CN114006584A - Tail current circuit of super regenerative oscillator and super regenerative oscillator - Google Patents
Tail current circuit of super regenerative oscillator and super regenerative oscillator Download PDFInfo
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- CN114006584A CN114006584A CN202210000500.XA CN202210000500A CN114006584A CN 114006584 A CN114006584 A CN 114006584A CN 202210000500 A CN202210000500 A CN 202210000500A CN 114006584 A CN114006584 A CN 114006584A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/1271—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the frequency being controlled by a control current, i.e. current controlled oscillators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/30—Circuits for homodyne or synchrodyne receivers
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Abstract
The invention relates to a tail current circuit of a super regenerative oscillator, the super regenerative oscillator and a super regenerative receiver. The tail current circuit of the super regenerative oscillator comprises: the comparison module is used for comparing the target voltage with a preset oscillation voltage of the super-regenerative oscillator; the control module is connected with the comparison module and used for outputting a control signal under the condition that the preset oscillation voltage is smaller than the target voltage; and the tail current adjusting module is connected with the control module, is used for being connected with a tail current input end of the super regenerative oscillator and is used for increasing the tail current provided to the tail current input end of the super regenerative oscillator under the condition of receiving the control signal. The tail current circuit can maintain the starting time of the super-regenerative oscillator at a relatively fixed time.
Description
Technical Field
The invention relates to the technical field of super-regenerative oscillators, in particular to a tail current circuit of a super-regenerative oscillator and the super-regenerative oscillator.
Background
The super-regenerative oscillator is a core circuit of the super-regenerative receiver, and the super-regenerative receiver mainly realizes the receiving and demodulation of signals through the oscillation starting condition of the super-regenerative oscillator at different input signals.
The super-regenerative oscillator is a core circuit of the super-regenerative receiver, when no signal is received, the oscillation starting time of the super-regenerative oscillator in each intermittent period is a relatively stable value, when the signal is received, the oscillation starting time of the super-regenerative oscillator in each intermittent period is shortened, therefore, the envelope of the output signal of the super-regenerative oscillator is different when the signal is present or absent, and the subsequent envelope detection circuit demodulates the input signal according to the envelope difference. The key of the super-regenerative receiver is to receive and judge signals by using the difference of the oscillation starting time of the super-regenerative oscillator when the super-regenerative oscillator has or does not have signals. However, the oscillation start time of the super-regenerative oscillator may be affected by various external factors (factors other than the received signal), so that the oscillation start time is changed when there is or does not have a signal, and demodulation errors are caused.
Disclosure of Invention
Accordingly, there is a need for a tail current circuit of a super-regenerative oscillator and a super-regenerative oscillator having a relatively fixed oscillation start time.
In a first aspect, a tail current circuit of a super-regenerative oscillator is provided, comprising: the device comprises a comparison module, a detection module and a control module, wherein the comparison module is used for comparing a target voltage with a preset oscillation voltage of a super-regenerative oscillator, and the preset oscillation voltage of the super-regenerative oscillator is an oscillation voltage output by the super-regenerative oscillator under the condition that an input signal of the super-regenerative oscillator is a preset signal; the control module is connected with the comparison module and used for outputting a control signal under the condition that the preset oscillation voltage is smaller than the target voltage; the tail current adjusting module is connected with the control module, and is used for being connected with the tail current input end of the super regenerative oscillator, and is used for receiving the tail current provided by the tail current input end of the super regenerative oscillator in an increasing mode under the condition of the control signal.
In one embodiment, the tail current regulation module comprises: the current unit comprises a main current branch and a plurality of auxiliary current branches, the input end of the main current branch is used for being connected with a first power supply, and the output end of each auxiliary current branch is connected with the tail current input end of the super-regenerative oscillator; the switching unit is connected with the control module and the current unit, and the switching unit is used for increasing the number of the auxiliary current branches communicated with the output end of the main current branch under the condition of receiving a control signal so as to increase the tail current provided to the tail current input end of the super-regenerative oscillator.
In one embodiment, the main current branch comprises a first switch tube, the secondary current branch comprises a second switch tube, the first switch tube comprises a first end, a second end and a third end, the second switch tube comprises a first end, a second end and a third end, the first end of the first switch tube is used for connecting a first power supply, the second end of the first switch tube is used for grounding, the third end of the first switch tube is connected with the first end of the first switch tube, the first end of each second switch tube is connected with the tail current input end of the super regenerative oscillator, the second end of each second switch tube is used for grounding, the third end of each second switch tube is connected with the third end of the first switch tube, and the first switch tube is used when the difference value between the third end voltage of the first switch tube and the second end voltage of the first switch tube is larger than a first threshold value, the current of the first switching tube flows from the first end of the first switching tube to the second end of the first switching tube, and the current of the second switching tube flows from the first end of the second switching tube to the second end of the second switching tube when the difference value between the voltage of the third end of the second switching tube and the voltage of the second end of the second switching tube is greater than a second threshold value; the switch unit comprises a plurality of controlled switches, the controlled switches correspond to the second switch tubes one to one, the first ends of the controlled switches are connected with the third ends of the first switch tubes, the second ends of the controlled switches are connected with the third ends of the second switch tubes, the third ends of the controlled switches are connected with the control module, and each controlled switch is used for controlling the connection and disconnection of the first ends of the controlled switches and the second ends of the controlled switches under the control of the control module.
In one embodiment, the switching unit further includes a third switching tube, the third switching tube includes a first end, a second end and a third end, the first end of the third switching tube is connected to the tail current input end of the super-regenerative oscillator, the second end of the third switching tube is used for grounding, the third end of the third switching tube is connected to the third end of the first switching tube, and the third switching tube allows current of the third switching tube to flow from the first end of the third switching tube to the second end of the third switching tube when a difference between a voltage of the third end of the third switching tube and a voltage of the second end of the third switching tube is greater than a third threshold value.
In one embodiment, the target voltage is a preset oscillation voltage amplitude of the super-regenerative oscillator when the oscillation starting time of the super-regenerative oscillator is half of the extinction period of the super-regenerative oscillator.
In one embodiment, the peak detector is connected to the comparison module, and is further configured to be connected to the super-regenerative oscillator, and is configured to detect a peak value of a preset oscillation voltage of the super-regenerative oscillator, and output a detection signal corresponding to the peak value to the comparison module.
In a second aspect, there is provided a super-regenerative oscillator comprising a tail current circuit according to any one of the above first aspects.
In a third aspect, there is provided a super-regenerative receiver comprising the super-regenerative oscillator according to the second aspect.
In one embodiment, the super regenerative receiver further comprises: a receiving antenna for receiving a signal; and the main controlled switch is connected with the control module and used for switching off or switching on the receiving antenna and the super-regenerative oscillator under the control of the control module.
In one embodiment, the super-regenerative receiver further comprises an amplifier, an input end of the amplifier is used for receiving an input signal, and an output end of the amplifier is connected with an input end of the super-regenerative oscillator; the demodulator is connected with the output end of the super-regenerative oscillator and used for demodulating the input signal according to the oscillation signal output by the super-regenerative oscillator; and the extinguishing signal generator is connected with an extinguishing signal input end of the super-regenerative oscillator and used for providing an extinguishing signal for the super-regenerative oscillator.
The tail current circuit of the super regenerative oscillator comprises a comparison module, a control module and a tail current adjusting module, wherein the control module controls the tail current adjusting module to increase tail current provided to a tail current input end of the super regenerative oscillator when preset oscillation voltage is smaller than target voltage, so that the preset oscillation voltage is increased until the preset oscillation voltage of the super regenerative oscillator is just larger than the target voltage, and the starting oscillation time of the super regenerative oscillator is maintained at a relatively fixed time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a tail current circuit of a first embodiment of a super-regenerative oscillator;
FIG. 2 is a tail current circuit of a second embodiment of a super-regenerative oscillator;
FIG. 3 is a tail current circuit of a third embodiment of a super-regenerative oscillator;
FIG. 4 is a first block diagram of the tail current regulator block of FIG. 3;
FIG. 5 is a second module configuration of the tail current regulation module of FIG. 3;
FIG. 6 is a schematic diagram of an embodiment of a super-regenerative oscillator;
FIG. 7 is a block diagram of a super regenerative receiver according to an embodiment;
FIG. 8 is a schematic diagram of a super-regenerative receiver according to another embodiment;
FIG. 9 is a schematic flow chart illustrating a method for self-calibration of the super-regenerative oscillator;
fig. 10 is a schematic flowchart of a method for self-calibration of super-regenerative oscillator oscillation start-up according to another embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
As described in the background, the super-regenerative receiver's ability to receive signals depends on the variation of the oscillation start time of the super-regenerative oscillator of its core module when receiving "0" or "1" signals, but the super-regenerative oscillator operates in an intermittent oscillation state, and the oscillation start time is very sensitive to process, temperature, and power supply voltage. The above factors may cause the super-regenerative oscillator to start oscillating too fast or too slow, resulting in demodulation errors of the super-regenerative receiver. In view of this, an embodiment of the present application provides a tail current circuit of a super-regenerative oscillator, where the tail current circuit of the super-regenerative oscillator may be configured to provide a tail current with an adjustable magnitude for the super-regenerative oscillator, so as to adjust a start-up time of the super-regenerative oscillator, and ensure that the start-up time of the super-regenerative oscillator can be maintained at a relatively fixed time under the conditions of process deviation, temperature difference, and different power supply voltages, thereby ensuring correct demodulation of a super-regenerative receiver.
Referring to fig. 1, a tail current circuit of a super-regenerative oscillator according to a first embodiment of the present application is shown. As shown in fig. 1, the tail current circuit of the super-regenerative oscillator may include a comparison module 102, a control module 104, and a tail current adjustment module 106.
The comparing module 102 is configured to compare the target voltage with a preset oscillating voltage of the super-regenerative oscillator. The preset oscillating voltage of the super-regenerative oscillator is the oscillating voltage output by the super-regenerative oscillator under the condition that the input signal of the super-regenerative oscillator is the preset signal. When the input signals of the super-regenerative oscillators are the same, the larger the tail current of the super-regenerative oscillator is, the smaller the oscillation start time of the super-regenerative oscillator is. Therefore, after the extinction signal is cancelled and a certain time passes, the voltage amplitude of the super-regenerative oscillator with large tail current is larger than that of the super-regenerative oscillator with small tail current. Therefore, whether the oscillation starting time of the super regenerative oscillator meets the demodulation requirement or not can be determined by comparing the preset oscillation voltage amplitude after a certain time after the extinguishing signal is cancelled with the target voltage amplitude. The target voltage amplitude can be set according to a voltage amplitude corresponding to an oscillation signal output by the super regenerative oscillator when an input signal of the super regenerative oscillator is a preset signal and the oscillation starting time of the super regenerative oscillator is the target oscillation starting time. In one embodiment, the target voltage is a preset oscillation voltage amplitude of the super-regenerative oscillator when the oscillation starting time of the super-regenerative oscillator is half of the extinction period of the super-regenerative oscillator. It should be noted that the super-regenerative oscillator is actually a super-regenerative oscillator that operates in an intermittent oscillation state, the intermittent frequency is determined by the blanking signal, and the blanking period is the period of the blanking signal. In one embodiment, the preset signal may be a "0" signal or a "1" signal.
In one embodiment, the comparison module may be configured to compare the target voltage with a preset oscillating voltage of the super-regenerative oscillator, and output a first signal if the target voltage is greater than the preset oscillating voltage, and output a second signal if the target voltage is less than the preset oscillating voltage, where the first signal and the second signal are different signals.
In one embodiment, the comparison module may include a voltage comparator. Specifically, the same-direction input end of the voltage comparator is used for accessing one of the target voltage and the preset oscillating voltage of the super-regenerative oscillator, the reverse-direction input end of the voltage comparator is used for accessing the other one of the target voltage and the preset oscillating voltage of the super-regenerative oscillator, and the output end of the voltage comparator is connected with the control module. It can be understood that, under the condition that the same-direction input end of the voltage comparator is connected with the target voltage and the reverse-direction input end of the voltage comparator is connected with the preset oscillating voltage, if the preset oscillating voltage is greater than the target voltage, the output end of the voltage comparator outputs a low level signal, and if the preset oscillating voltage is less than the target voltage, the output end of the voltage comparator outputs a high level signal. Under the condition that the same-direction input end of the voltage comparator is connected with a preset oscillating voltage and the reverse-direction input end of the voltage comparator is connected with a target voltage, if the preset oscillating voltage is larger than the target voltage, the voltage comparator outputs a high-level signal, and if the preset oscillating voltage is smaller than the target voltage, the voltage comparator outputs a low-level signal. Through the voltage comparator, the control module can determine the relative size of the target voltage and the preset oscillating voltage, so that a corresponding control signal is output, and the tail current adjusting module is controlled to provide corresponding tail current.
The control module 104 is connected to the comparing module 102, and is configured to output a control signal when the preset oscillating voltage is smaller than the target voltage.
The tail current adjusting module 106 is connected to the control module 104, the tail current adjusting module 106 is configured to be connected to a tail current input terminal of the super-regenerative oscillator, and the tail current adjusting module 106 is configured to increase a tail current provided to the tail current input terminal of the super-regenerative oscillator when receiving the control signal. It should be noted that, in the case that the preset oscillating voltage is smaller than the target voltage, the tail current adjusting module 106 increases the tail current provided to the tail current input terminal of the super-regenerative oscillator, so as to increase the amplitude of the preset oscillating voltage until the preset oscillating voltage is larger than the target voltage. Therefore, the preset oscillation voltage of the super-regenerative oscillator is just larger than or equal to the target voltage, namely, the oscillation starting time is relatively fixed under the condition that the input signal of the super-regenerative oscillator is the preset signal, and the oscillation starting time is ensured to be maintained at a relatively fixed time.
The tail current regulating circuit of the super-regenerative oscillator provided by the above embodiment includes a comparison module, a control module and a tail current regulating module, where the control module controls the tail current regulating module to increase the tail current provided to the tail current input terminal of the super-regenerative oscillator when the preset oscillating voltage is smaller than the target voltage, so as to increase the preset oscillating voltage until the preset oscillating voltage of the super-regenerative oscillator is just greater than the target voltage, so that the oscillation starting time of the super-regenerative oscillator is maintained at a relatively fixed time.
Since the peak value of the super-regenerative oscillator is a key feature after the super-regenerative oscillator oscillates, the following embodiments provide a tail current circuit of the super-regenerative oscillator, which is used to determine how much tail current should be provided to the super-regenerative oscillator according to the peak value of the target voltage and the preset oscillating voltage.
Referring to fig. 2, a tail current circuit of a super-regenerative oscillator according to a second embodiment of the present application is shown. As shown in fig. 2, the tail current circuit of the super-regenerative oscillator provided by the above-mentioned embodiment may further include a peak detector 202.
The peak detector 202 is connected to the comparison module 102, and the peak detector 202 is further configured to be connected to the super regenerative oscillator, and configured to detect a peak value of a preset oscillation voltage of the super regenerative oscillator, and output a detection signal corresponding to the peak value to the comparison module 102. It is understood that the comparing module 102 is used for comparing a target voltage with a peak value of a preset oscillating voltage of the super-regenerative oscillator, wherein the target voltage is set according to the peak value of the oscillating voltage of the output of the super-regenerative oscillator when the input signal of the super-regenerative oscillator is a preset signal and the oscillation starting time is a target oscillation starting time.
In one embodiment, continuing to refer to fig. 2, the peak detector 202 may include a diode D1, a resistor R1, and a capacitor C1. Specifically, the anode of the diode D1 is connected to the super-regenerative oscillator for obtaining an output signal of the super-regenerative oscillator, the cathode of the diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is grounded, the capacitor C1 is connected in parallel to the resistor R1, and the cathode of the diode D1 is connected to the comparison module 201 for outputting a detection signal corresponding to a peak value of the output signal of the super-regenerative oscillator. It can be understood that when the diode D1 is turned on, the output signal of the super-regenerative oscillator charges the capacitor C1 through the diode D1, and the potential of the capacitor C1 rises; when the diode D1 is turned off, the capacitor C1 discharges through the resistor R1, and the potential of the capacitor C1 decreases. Since the resistance of the resistor R1 is much larger than the equivalent on-resistance of the diode D1, the charging process of the capacitor C1 is fast, and the discharging process is slow. Thus, the peak detector 202 output voltage magnitude always follows the peak value of the input signal and remains at the maximum peak value of the super-regenerative oscillator output signal.
In the above embodiments, the tail current adjusting module provides the tail current to the super-regenerative oscillator, and then the following embodiments provide the structure of the tail current adjusting module to provide the tail current corresponding to the control signal to the super-regenerative oscillator according to the control signal.
Referring to fig. 3, which shows a schematic structural diagram of a tail current circuit of a super-regenerative oscillator according to a third embodiment of the present disclosure, as shown in fig. 3, the tail current adjusting module provided in the foregoing embodiment may include a current unit 302 and a switch unit 304.
The current unit 302 includes a main current branch and a plurality of auxiliary current branches, an input end of the main current branch is used for connecting the first power supply 306, an output end of the auxiliary current branch is connected with a tail current input end of the super-regenerative oscillator, and the switch unit 304 is connected with the control module 104 and the current unit 302. The switching unit 304 is configured to increase the number of secondary current branches in communication with the output of the primary current branch upon receiving the control signal to increase the tail current provided to the tail current input of the super-regenerative oscillator.
It should be noted that the first power source 306 may be used to provide an input current to the current cell 302. Alternatively, the first power source 306 may be a current source. It will be appreciated that the amount of current provided by the first power source 306 may be set as desired.
Please refer to fig. 4, which illustrates a structure of a current unit and a switch unit according to an embodiment of the present application. The primary current branch may include a first switching tube Q1 and the secondary current branch may include a second switching tube Q2. That is, the current unit may include a first switching tube Q1 and a plurality of second switching tubes Q2. Specifically, the first switch tube Q1 may include a first end, a second end and a third end, the second switch tube Q2 may include a first end, a second end and a third end, the first end of the first switch tube Q1 is configured to be connected to the first power source 306, the second end of the first switch tube Q1 is configured to be grounded, the third end of the first switch tube Q1 is connected to the first end of the first switch tube Q1, the first end of each second switch tube Q2 is connected to the tail current input end of the super-regenerative oscillator, and the second end of each second switch tube Q2 is configured to be grounded. It should be noted that, when the difference between the voltage at the third end of the first switch Q1 and the voltage at the second end of the first switch Q1 is greater than the first threshold, the current of the first switch Q1 flows from the first end of the first switch Q1 to the second end of the first switch Q1 of the first switch Q1. When the difference between the voltage at the third end of the second switch tube Q2 and the voltage at the second end of the second switch tube Q2 is greater than the second threshold, the second switch tube Q2 flows the current of the second switch tube Q2 from the first end of the second switch tube Q2 to the second end of the second switch tube Q2. The switch unit comprises a plurality of controlled switches K1, the controlled switches K1 correspond to the second switch tubes Q2 one by one, the first end of the controlled switch K1 is connected with the third end of the first switch tube Q1, the second end of the controlled switch K1 is connected with the third end of the second switch tube Q2, the third end of the controlled switch K1 is connected with the control module, and each controlled switch K1 is used for controlling the connection and disconnection of the first end of the controlled switch K1 and the second end of the controlled switch K1 under the control of the control module. It is understood that the first terminal of the first switch Q1 serves as the input terminal of the main current branch, the third terminal of the first switch Q1 serves as the output terminal of the main current branch, and the first terminal of the second switch Q2 serves as the output terminal of the auxiliary current branch.
It can be understood that the more the third terminal of the second switch Q2 is connected to the third terminal of the first switch Q1, the more the tail current is supplied to the tail current input terminal of the super-regenerative oscillator, so that by controlling the plurality of controlled switches K1, the connection between the third terminal of the second switch Q2 and the third terminal of the first switch Q1 is controlled, and the connection between the third terminal of the second switch Q2 and the third terminal of the first switch Q1 is controlled, so that the tail current with adjustable magnitude is supplied to the tail current input terminal of the super-regenerative oscillator.
In one embodiment, the first switch tube may be an NMOS tube, the first end of the first switch tube is a drain of the NMOS tube, the second end of the first switch tube is a source of the NMOS tube, and the third end of the first switch tube is a gate of the NMOS tube. In one embodiment, the second switch tube may be an NMOS tube, a first end of the second switch tube is a drain of the NMOS tube, a second end of the second switch tube is a source of the NMOS tube, and a third end of the second switch tube is a gate of the NMOS tube.
In one embodiment, the controlled switch may be, but is not limited to, an electromagnetic relay. Electromagnetic relay's coil one end and control module group are connected, and the coil other end of relay is used for ground connection, and the normally open contact of relay concatenates on the route of connection of the third end of first switch tube and the third end of second switch tube, and under the circumstances that the coil got electric, normally open contact was closed, and the third end of first switch tube is connected with the third end of second switch tube. And under the condition that the coil loses power, the normally open contact does not act, and the third end of the first switch tube is disconnected with the third end of the second switch tube. Therefore, the control module controls whether the coil of the electromagnetic relay is electrified or not to control the on-off of the third end of the first switch tube and the third end of the second switch tube.
Please refer to fig. 5, which illustrates a tail current adjusting module according to an embodiment of the present application. As shown in fig. 5, the switching unit may further include a third switching tube Q3. The third switching tube Q3 may include a first end, a second end, and a third end, the first end of the third switching tube Q3 is connected to the tail current input end of the super-regenerative oscillator, the second end of the third switching tube Q3 is used for grounding, the third end of the third switching tube Q3 is connected to the third end of the first switching tube Q1, and the third switching tube Q3 allows the current of the third switching tube Q3 to flow from the first end of the third switching tube Q3 to the second end of the third switching tube Q3 when the difference between the voltage of the third end of the third switching tube Q3 and the voltage of the second end of the third switching tube Q3 is greater than a third threshold. In one embodiment, the third switch transistor Q3 may be an NMOS transistor.
With reference to fig. 5, the tail current regulator module may further include a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, and a seventh switch Q7. The fourth switching tube Q4 includes a first terminal, a second terminal and a third terminal, the fifth switching tube Q5 includes a first terminal, a second terminal and a third terminal, the sixth switching tube Q6 includes a first terminal, a second terminal and a third terminal, and the seventh switching tube Q7 includes a first terminal, a second terminal and a third terminal. A first end of a fourth switching tube Q4 is connected to a first end of each second switching tube, a second end of a fourth switching tube Q4 is used for connecting a second power supply, a third end of a fourth switching tube Q4 is connected to a first end of a fourth switching tube Q4, a second end of a fifth switching tube Q5 is used for connecting a second power supply, a third end of a fifth switching tube Q5 is connected to a third end of a fourth switching tube Q4, a first end of a fifth switching tube Q5 is connected to a first end of a sixth switching tube Q6, a second end of a sixth switching tube Q6 is used for grounding, a third end of a sixth switching tube Q6 is connected to a first end of the sixth switching tube Q7 is connected to a third end of the sixth switching tube Q6, a second end of a seventh switching tube Q7 is used for grounding, and a first end of a seventh switching tube Q7 is connected to a tail current input end of an ultra-regenerative oscillator. When the difference between the voltage at the third end of the fourth switching tube Q4 and the voltage at the second end of the fourth switching tube Q4 is smaller than the fourth threshold, the current of the fourth switching tube Q4 flows from the second end of the fourth switching tube Q4 to the first end of the fourth switching tube Q4, when the difference between the voltage at the third end of the fifth switching tube Q5 and the voltage at the second end of the fifth switching tube Q5 is smaller than the fifth threshold, the current of the fifth switching tube Q5 flows from the second end of the fifth switching tube Q5 to the first end of the fifth switching tube Q5, when the difference between the voltage at the third end of the sixth switching tube Q6 and the voltage at the second end of the sixth switching tube Q6 is larger than the sixth threshold, the current of the sixth switching tube Q6 flows from the first end of the sixth switching tube Q68629 to the second end of the sixth switching tube Q6, and when the difference between the voltage at the third end of the sixth switching tube Q4684 and the seventh switching tube 7 is larger than the seventh threshold, the current of the seventh switching tube Q7 flows from the first end of the seventh switching tube Q7 to the second end of the seventh switching tube Q7. It should be noted that the first terminal current of the fifth switching tube Q5 corresponds to the first terminal current of the fourth switching tube Q4, that is, the first terminal current of the fifth switching tube Q5 can be adjusted by adjusting the first terminal current of the fourth switching tube Q4, so as to adjust the input current of the first terminal of the sixth switching tube Q6, so as to adjust the third terminal current of the seventh switching tube Q7, so as to adjust the tail current provided to the tail current input terminal of the super-regenerative oscillator. It should be noted that, the input current of the third terminal of the third switching tube increases, and the currents of the first terminal of the third switching tube and the second terminal of the third switching tube also increase. In one embodiment, the fourth switching transistor Q4 may be a PMOS transistor, the fifth switching transistor Q5 may be a PMOS transistor, the sixth switching transistor Q6 may be an NMOS transistor, and the seventh switching transistor Q7 may be an NMOS transistor.
It is understood that the tail current adjusting module may also take other forms, not limited to the form mentioned in the above embodiments, as long as it can achieve the function of increasing the tail current provided to the tail current input terminal of the super-regenerative oscillator according to the control signal.
In an embodiment of the present application, there is also provided a super-regenerative oscillator, which may include any one of the tail current circuits provided in the above embodiments.
Referring to fig. 6, the super-regenerative oscillator may further include a cross-coupling circuit 602 and an oscillation circuit 604, wherein the cross-coupling circuit 602 is connected in parallel with the oscillation circuit 604. Specifically, the cross-coupled circuit 602 includes a first fet Q8 and a second fet Q9, and the oscillator circuit includes an inductor L1 and a capacitor C2. The source electrode of the first field effect transistor Q8 is connected with the source electrode of the second field effect transistor Q9, the grid electrode of the first field effect transistor Q8 is connected with the drain electrode of the second field effect transistor Q9, the grid electrode of the second field effect transistor Q9 is connected with the drain electrode of the first field effect transistor Q8, the drain electrode of the first field effect transistor Q8 is connected with one end of the capacitor C2, the drain electrode of the second field effect transistor Q9 is connected with the other end of the capacitor C2, and the inductor L1 is connected with the capacitor C2 in parallel. The tail current adjusting module 106 is connected to the source of the first fet Q8 (or the second fet Q9).
With continued reference to fig. 6, in one embodiment, the super-regenerative oscillator may further include a third fet Q10, a fourth fet Q11, and a fifth fet Q12. Specifically, the gate of the third fet Q10 is used for receiving a blanking signal, the source of the third fet Q10 is connected to the drain of the first fet Q8, and the drain of the third fet Q10 is connected to the drain of the first fet Q8. The source electrode of the fourth field effect transistor Q11 is connected with a third power supply, the source electrode of the fifth field effect transistor Q12 is connected with the third power supply, the grid electrode of the fourth field effect transistor Q11 is connected with the drain electrode of the fifth field effect transistor Q12, the grid electrode of the fifth field effect transistor Q12 is connected with the drain electrode of the fourth field effect transistor Q11, the drain electrode of the fourth field effect transistor Q11 is connected with one end of a capacitor C2, and the drain electrode of the fifth field effect transistor Q12 is connected with the other end of a capacitor C2. The first field-effect tube Q8, the second field-effect tube Q9 and the third field-effect tube Q10 are all N-type field-effect tubes, and the fourth field-effect tube Q11 and the fifth field-effect tube Q12 are all P-type field-effect tubes. It should be noted that the frequency of the super-regenerative oscillator is determined by the inductor L1 and the capacitor C2, the amplitude of the super-regenerative oscillator is determined by the sum of the negative conductance of the first fet Q8, the second fet Q9, the third fet Q10 and the fourth fet Q11 and the positive conductance of the LC super-regenerative oscillator, and the negative conductance can be adjusted by adjusting the tail current.
In the above embodiment, after the blanking signal is cancelled and a certain time elapses, the tail current of the super-regenerative oscillator is adjusted according to the comparison structure of the comparison module, so that the start-up of the super-regenerative oscillator is always maintained within a fixed time. The super-regenerative oscillator is insensitive to process, temperature and supply voltage.
It is understood that the super-regenerative oscillator may also have other structures, such as a ring oscillator, so long as the oscillation start time of the oscillator can be adjusted by adjusting the magnitude of the input tail current, so that the oscillation start time of the oscillator can be maintained within a fixed time.
In an embodiment of the present application, there is also provided a super-regenerative receiver, which may include any one of the super-regenerative oscillators provided in the above embodiments.
Referring to fig. 7, in one embodiment, the super regenerative receiver may further include an amplifier 702, a demodulator 704, and a blanking signal generator 706. Wherein, the input end of the amplifier 702 is used for receiving an input signal, the output end of the amplifier 702 is connected with the input end of the super-regenerative oscillator 708, the output end of the super-regenerative oscillator 708 is connected with the demodulator 704, and the blanking signal generator 706 is connected with the blanking signal input end of the super-regenerative oscillator 708 and is used for providing a blanking signal to the super-regenerative oscillator 708. The demodulator 704 may be configured to demodulate the input signal of the super-regenerative receiver according to the oscillation signal output by the super-regenerative oscillator 708, and the demodulator 704 may demodulate the received input signal according to the difference of the oscillation time of the super-regenerative oscillator 708. The amplifier 702 may be used for input signal amplification to improve the sensitivity of the receiver while isolating leakage of the super-regenerative oscillator oscillation signal in the direction of the signal input. Optionally, amplifier 702 is a low noise amplifier.
In one embodiment, continuing to refer to fig. 7, the super regenerative receiver may further comprise a receive antenna 710 and a master controlled switch 712. The receiving antenna 710 is used for receiving signals, and the main controlled switch 712 is connected to the control module 104 and used for switching off or on the receiving antenna 710 and the super-regenerative oscillator 708 under the control of the control module 104. Note that, when the oscillation start time of the super-regenerative oscillator 708 is calibrated, the receiving antenna 710 is disconnected from the super-regenerative oscillator 708, and the calibration of the super-regenerative oscillator 708 is not affected by the input signal received by the receiving antenna 710. In normal operation of the super regenerative receiver, the receive antenna 710 is connected to the super regenerative oscillator 708 for processing of the incoming signal. In one embodiment, the main controlled switch is open if the control module 104 outputs a low signal to the main controlled switch 712, and closed if the control module 104 outputs a high signal to the main controlled switch 712. In one embodiment, the main controlled switch is open if the control module 104 outputs a high signal to the main controlled switch 712, and closed if the control module 104 outputs a low signal to the main controlled switch 712.
Referring to fig. 8, a super-regenerative receiver according to an embodiment of the present application is shown, where as shown in fig. 8, the super-regenerative receiver may include: a receiving antenna 710, a main controlled switch 712, an amplifier 702, a super-regenerative oscillator body 802, a demodulator 704, a peak detector 804, a comparator 806, a control module 104, a tail current adjusting module 106, and a blanking signal generator 706. It should be noted that, referring to fig. 6 and 8, the super-regenerative oscillator main body 802 includes a cross-coupled circuit 602, an oscillating circuit 604, a third fet Q10, a fourth fet Q11, and a fifth fet Q12, and the cross-coupled circuit 602, the oscillating circuit 604, the third fet Q10, the fourth fet Q11, and the fifth fet Q12 are described in detail in the above embodiments and will not be described again.
The receiving antenna 710 is connected to one end of the main controlled switch 712, the other end of the main controlled switch 712 is connected to the input end of the amplifier 702, the output end of the amplifier 702 is connected to the input end of the super-regenerative oscillator main body 802, and the demodulator 704 is connected to the output end of the super-regenerative oscillator main body 802. A first output terminal of the quench signal generator 706 is connected to a quench signal input terminal of the super-regenerative oscillator body 802, and a second output terminal of the quench signal generator 706 is connected to a clock signal port of the control module 104. The peak detector 804 is respectively connected to the output terminal of the super-regenerative oscillator body 802 and the non-inverting input terminal IN1 of the comparator 806, the inverting input terminal IN2 of the comparator 806 is used for connecting to the target voltage, the output terminal of the comparator 806 is connected to the main control module 104, and the main control module 104 is respectively connected to the tail current adjusting module 106 and the main controlled switch 712. The tail current regulation module 106 is connected to a tail current input of the super-regenerative oscillator body 802. It should be noted that the main controlled switch 712 is turned on or off under the control of the control module 104, so that the amplifier 702 receives the signal received by the receiving antenna 710, or the amplifier 702 does not receive the signal received by the receiving antenna 710, wherein the main controlled switch 712 is turned off when a low level signal is received, and the main controlled switch 712 is turned on when a high level signal is received. The quench signal generator 706 may provide a quench signal to the super-regenerative oscillator via a first output, and the quench signal generator 706 may provide a clock signal to the control module 104 via a second output. The blanking signal and the clock signal are opposite signals, that is, when the blanking signal is at a high level, the clock signal is at a low level, and when the blanking signal is at a low level, the clock signal is at a high level. The peak detector 804 functions to acquire a peak value of the oscillation signal of the super-regenerative oscillator and output the acquired peak value to the non-inverting input terminal IN1 of the comparator 806. As can be appreciated, in the case where the peak value of the oscillation signal is greater than the target voltage, the comparator 806 outputs a high level signal; when the peak value of the oscillation signal is smaller than the target voltage, the comparator 806 outputs a low level signal, the control module 104 controls the tail current adjusting module 106 according to the level signal output by the comparator, when the comparator 806 outputs a low level, the control module 106 controls the tail current adjusting module 106 to increase the tail current provided to the tail current input end of the super-regenerative oscillator main body 802, and when the comparator 806 outputs a high level signal, the control module keeps the tail current provided to the tail current input end of the super-regenerative oscillator main body 802 currently, and controls the main controlled switch to be closed. In one embodiment, the control module 104 controls the tail current regulation module 106 to provide the tail current to the tail current input of the super-regenerative oscillator body 802 by an equal amount each time. The control module 104 may also control the main controlled switch to close if the start-up time of the super-regenerative oscillator is calibrated. In one embodiment, the control module 104 may be configured to perform the steps of the oscillation start self-calibration method of the super-regenerative oscillator provided in any one of the following embodiments in a power-up situation. Therefore, the oscillation starting self-calibration of the super-regenerative oscillator is realized each time the super-regenerative oscillator is powered on.
Referring to fig. 9, a schematic flow chart of a method for self-calibration of oscillation starting of a super-regenerative oscillator according to an embodiment of the present application is shown. As shown in fig. 9, the oscillation starting self-calibration method of the super-regenerative oscillator includes steps S902 to S906.
And S902, providing a tail current to a tail current input end of the super regenerative oscillator.
S904, judging whether the oscillation voltage of the super-regenerative oscillator is greater than the target voltage; if not, go to step S906.
It should be noted that, if the oscillation voltage of the super-regenerative oscillator is greater than the target voltage, it represents that the difference between the start-oscillation time of the super-regenerative oscillator and the target start-oscillation time is small, that is, after self-calibration, the start-oscillation time of the super-regenerative oscillator is kept at a relatively fixed time, so as to ensure correct demodulation of the receiver.
S906, increasing the supply of the tail current to the tail current input of the super-regenerative oscillator, and continuing to perform step S904.
Referring to fig. 10, a flow chart of a method for oscillation starting self-calibration of a super-regenerative oscillator according to an embodiment of the present application is shown. As shown in fig. 10, the oscillation starting self-calibration method of the super-regenerative oscillator includes steps S1002 to S1006.
And S1002, controlling the main controlled switch to be switched off.
One end of the main controlled switch is connected with the receiving antenna, the other end of the main controlled switch is connected with the input end of the super-regenerative oscillator, the main controlled switch is disconnected in the process of starting oscillation and self-calibration of the super-regenerative oscillator, and the condition that the calibration of the super-regenerative oscillator is influenced by signals received by the receiving antenna is avoided.
And S1004, controlling the tail current regulation module to provide the minimum bias current to the tail current input end of the super regenerative oscillator.
It should be noted that the minimum bias current is the minimum current that the tail current regulation module can output.
S1006, receiving the output signal of the comparator, and if the output signal of the comparator is a low level signal, executing step S1008; if the output signal of the comparator is a high level signal, step S1010 is executed.
The positive phase input end of the comparator is connected with the output end of the peak detector, the negative phase input end of the comparator is used for being connected with a target voltage, and the input end of the peak detector is connected with the output end of the super-regenerative oscillator main body and used for obtaining the voltage peak value of the oscillation signal output by the super-regenerative oscillator main body. If the output signal of the comparator is a low level signal, it indicates that the voltage peak value of the oscillation signal is smaller than the target voltage, and if the output signal of the comparator is a high level signal, it indicates that the voltage peak value of the oscillation signal is larger than the target voltage.
S1008, controlling the tail current adjustment module to increase the current provided to the tail current input of the super-regenerative oscillator, and continuing to execute step S1006.
And S1010, controlling the main controlled switch to be closed.
It should be noted that, when the output signal of the comparator is a high-level signal, that is, the voltage peak of the oscillation signal is greater than the target voltage, the oscillation starting time of the super-regenerative oscillator may be satisfied that the demodulation of the demodulator is not erroneous. And under the condition that the output signal of the comparator is a high-level signal, the main controlled switch is controlled to be closed, and the current provided to the tail current input end of the super-regenerative oscillator is maintained.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A tail current circuit for a super-regenerative oscillator, comprising:
the device comprises a comparison module, a detection module and a control module, wherein the comparison module is used for comparing a target voltage with a preset oscillation voltage of a super-regenerative oscillator, and the preset oscillation voltage of the super-regenerative oscillator is an oscillation voltage output by the super-regenerative oscillator under the condition that an input signal of the super-regenerative oscillator is a preset signal;
the control module is connected with the comparison module and used for outputting a control signal under the condition that the preset oscillation voltage is smaller than the target voltage;
the tail current adjusting module is connected with the control module, and is used for being connected with the tail current input end of the super regenerative oscillator, and is used for receiving the tail current provided by the tail current input end of the super regenerative oscillator in an increasing mode under the condition of the control signal.
2. The tail current circuit of a super-regenerative oscillator of claim 1, wherein the tail current regulation module comprises:
the current unit comprises a main current branch and a plurality of auxiliary current branches, the input end of the main current branch is used for being connected with a first power supply, and the output end of each auxiliary current branch is connected with the tail current input end of the super-regenerative oscillator;
the switching unit is connected with the control module and the current unit, and the switching unit is used for increasing the number of the auxiliary current branches communicated with the output end of the main current branch under the condition of receiving a control signal so as to increase the tail current provided to the tail current input end of the super-regenerative oscillator.
3. The tail current circuit of the super-regenerative oscillator according to claim 2, wherein the main current branch comprises a first switch tube, the secondary current branch comprises a second switch tube, the first switch tube comprises a first end, a second end and a third end, the second switch tube comprises a first end, a second end and a third end, the first end of the first switch tube is used for connecting a first power supply, the second end of the first switch tube is used for grounding, the third end of the first switch tube is connected with the first end of the first switch tube, the first end of each second switch tube is connected with the tail current input end of the super-regenerative oscillator, the second end of each second switch tube is used for grounding, and the first switch tube is used for connecting the tail current input end of the super-regenerative oscillator when the difference value between the voltage of the third end of the first switch tube and the voltage of the second end of the first switch tube is larger than a first threshold value, the current of the first switching tube flows from the first end of the first switching tube to the second end of the first switching tube, and the current of the second switching tube flows from the first end of the second switching tube to the second end of the second switching tube when the difference value between the voltage of the third end of the second switching tube and the voltage of the second end of the second switching tube is greater than a second threshold value;
the switch unit comprises a plurality of controlled switches, the controlled switches correspond to the second switch tubes one to one, the first ends of the controlled switches are connected with the third ends of the first switch tubes, the second ends of the controlled switches are connected with the third ends of the second switch tubes, the third ends of the controlled switches are connected with the control module, and each controlled switch is used for controlling the connection and disconnection of the first ends of the controlled switches and the second ends of the controlled switches under the control of the control module.
4. The tail current circuit of the super-regenerative oscillator according to claim 3, wherein the switching unit further comprises a third switching tube, the third switching tube comprises a first end, a second end and a third end, the first end of the third switching tube is connected to the tail current input terminal of the super-regenerative oscillator, the second end of the third switching tube is used for grounding, the third end of the third switching tube is connected to the third end of the first switching tube, and the current of the third switching tube flows from the first end of the third switching tube to the second end of the third switching tube when the difference between the voltage of the third end of the third switching tube and the voltage of the second end of the third switching tube is greater than a third threshold value.
5. The tail current circuit of claim 1, wherein the target voltage is a preset oscillation voltage amplitude of the super-regenerative oscillator when a start-up time of the super-regenerative oscillator is half of a quench period of the super-regenerative oscillator.
6. The tail current circuit of the super-regenerative oscillator according to claim 1, further comprising a peak detector, connected to the comparison module, and further connected to the super-regenerative oscillator, for detecting a peak value of a preset oscillating voltage of the super-regenerative oscillator, and outputting a detection signal corresponding to the peak value to the comparison module.
7. A super-regenerative oscillator, characterized by comprising a tail current circuit according to any of claims 1 to 6.
8. A super-regenerative receiver, characterized by comprising the super-regenerative oscillator according to claim 7.
9. The super-regenerative receiver of claim 8, further comprising:
a receiving antenna for receiving a signal;
and the main controlled switch is connected with the control module and used for switching off or switching on the receiving antenna and the super-regenerative oscillator under the control of the control module.
10. The super-regenerative receiver of claim 8, further comprising:
an amplifier, an input end of the amplifier is used for receiving an input signal, and an output end of the amplifier is connected with an input end of the super-regenerative oscillator;
the demodulator is connected with the output end of the super-regenerative oscillator and used for demodulating the input signal according to the oscillation signal output by the super-regenerative oscillator;
and the extinguishing signal generator is connected with an extinguishing signal input end of the super-regenerative oscillator and used for providing an extinguishing signal for the super-regenerative oscillator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115473593A (en) * | 2022-09-13 | 2022-12-13 | 福州大学 | A circuit for non-interfering calibration of extinguished signals in super-regenerative receivers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150893A (en) * | 1997-09-26 | 2000-11-21 | Texas Instruments Incorporated | Voltage controlled oscillator with wide frequency range and low noise for integrated circuit fabrication |
| WO2006129405A1 (en) * | 2005-05-31 | 2006-12-07 | Kabushiki Kaisha Toyota Jidoshokki | Voltage controlled oscillator |
| CN104467887A (en) * | 2014-11-20 | 2015-03-25 | 东南大学 | Dynamic offset superregenerative receiver |
| CN104579319A (en) * | 2014-04-22 | 2015-04-29 | 上海华虹宏力半导体制造有限公司 | Multi-phase clock generator |
| CN111800086A (en) * | 2020-08-03 | 2020-10-20 | 牛芯半导体(深圳)有限公司 | Oscillator |
-
2022
- 2022-01-04 CN CN202210000500.XA patent/CN114006584B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150893A (en) * | 1997-09-26 | 2000-11-21 | Texas Instruments Incorporated | Voltage controlled oscillator with wide frequency range and low noise for integrated circuit fabrication |
| WO2006129405A1 (en) * | 2005-05-31 | 2006-12-07 | Kabushiki Kaisha Toyota Jidoshokki | Voltage controlled oscillator |
| CN104579319A (en) * | 2014-04-22 | 2015-04-29 | 上海华虹宏力半导体制造有限公司 | Multi-phase clock generator |
| CN104467887A (en) * | 2014-11-20 | 2015-03-25 | 东南大学 | Dynamic offset superregenerative receiver |
| CN111800086A (en) * | 2020-08-03 | 2020-10-20 | 牛芯半导体(深圳)有限公司 | Oscillator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115473593A (en) * | 2022-09-13 | 2022-12-13 | 福州大学 | A circuit for non-interfering calibration of extinguished signals in super-regenerative receivers |
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