CN118092572B - Linear power supply generating circuit with variable wide voltage and output waveform - Google Patents
Linear power supply generating circuit with variable wide voltage and output waveform Download PDFInfo
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- CN118092572B CN118092572B CN202410492577.2A CN202410492577A CN118092572B CN 118092572 B CN118092572 B CN 118092572B CN 202410492577 A CN202410492577 A CN 202410492577A CN 118092572 B CN118092572 B CN 118092572B
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- 238000010248 power generation Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 57
- 238000012360 testing method Methods 0.000 abstract description 6
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
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Abstract
The application discloses a linear power supply generating circuit with variable wide voltage and output waveform, which comprises a high-voltage input end and a waveform output end, wherein the high-voltage input end is connected with the input end of a high-voltage conversion XV circuit, the high-voltage conversion XV circuit converts the high voltage of the high-voltage input end into XV voltage, and the output end of the high-voltage conversion XV circuit is respectively connected with the high-voltage conversion XV circuit, a DAC reference voltage generating circuit, a DAC power supply voltage generating circuit and an output voltage control circuit; the high-voltage conversion-XV circuit converts XV voltage at the output end of the high-voltage conversion-XV circuit into-XV voltage, and the output end of the high-voltage conversion-XV circuit is connected with the output voltage control circuit; the DAC reference voltage generation circuit converts XV voltage at the output end of the high-voltage XV conversion circuit into 2.5V voltage, and the output end voltage of the DAC reference voltage generation circuit is used as the reference voltage of the arbitrary waveform generation circuit; the power generation circuit of this scheme, the structure is clear, and circuit size is less, has also solved the unable problem of carrying of traditional test machine ATE.
Description
Technical Field
The application relates to the technical field of electronic device testing, in particular to a linear power supply generating circuit with variable wide voltage and output waveform.
Background
During integrated circuit testing, it is often necessary to generate a start-up or shut-down waveform at the power port for one millisecond to several hundred milliseconds of response time, thereby simulating various on-off states in the user's use environment. Aiming at the problem that the output of any waveform voltage needs to be realized at a power supply port in the test process, the conventional programmable power supply or the power supply in ATE cannot meet the test requirement of complaints.
The traditional programmable power supply mainly only can generate fixed voltage and can not realize arbitrary waveform output; although the programmable power supply in ATE can meet the waveform output function, the main disadvantage is poor carrying capacity, usually less than 1A, large volume and inconvenient carrying.
In view of this, a need exists for a wide voltage, variable output waveform linear power generation circuit.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present application proposes a wide-voltage, variable-output-waveform linear power supply generating circuit for solving the control problem of the power supply voltage waveform in the existing device.
The application adopts the following technical scheme for realizing the purposes:
a wide voltage, variable output waveform linear power supply generating circuit comprising a high voltage input and a waveform output, wherein:
the high-voltage input end is connected with the input end of the high-voltage conversion XV circuit, the high-voltage conversion XV circuit converts the high voltage of the high-voltage input end into XV voltage, and the output end of the high-voltage conversion XV circuit is respectively connected with the high-voltage conversion-XV circuit, the DAC reference voltage generating circuit, the DAC power supply voltage generating circuit and the output voltage control circuit;
the high-voltage conversion-XV circuit converts XV voltage at the output end of the high-voltage conversion-XV circuit into-XV voltage, and the output end of the high-voltage conversion-XV circuit is connected with the output voltage control circuit;
the DAC reference voltage generation circuit converts XV voltage at the output end of the high-voltage XV conversion circuit into 2.5V voltage, and the output end voltage of the DAC reference voltage generation circuit is used as the reference voltage of the arbitrary waveform generation circuit; the DAC power supply voltage generation circuit converts the voltage at the output end of the high-voltage XV conversion circuit into 3.3V voltage, and the voltage at the output end of the DAC power supply voltage generation circuit is used as the power supply voltage of the arbitrary waveform generation circuit;
The arbitrary waveform generation circuit comprises a control module and a DAC chip, wherein the control module is communicated with the DAC chip, a control quantity D is input to the DAC chip according to a preset time interval, the output end of the DAC chip is grounded through a capacitor, and the common end of the output end of the DAC chip and the capacitor is an arbitrary waveform output end of the arbitrary waveform generation circuit, wherein D is a decimal value of a control output voltage register in the DAC chip;
the output voltage control circuit comprises a high-voltage operational amplifier, wherein the high-voltage operational amplifier is configured to:
enabling the common ground;
The enabling end is grounded through a third capacitor and is powered by the high-voltage XV conversion circuit;
The negative input end is simultaneously connected with one end of a second resistor and one end of a third resistor, the other end of the second resistor is connected with the source electrode of the transistor, and the other end of the third resistor is grounded;
the positive input end is connected with the arbitrary waveform output end of the arbitrary waveform generating circuit;
the negative power supply end is grounded through a second capacitor and is powered by the high-voltage transfer-XV circuit;
the positive power supply end is connected with one end of the first capacitor and the drain electrode of the transistor at the same time, and the other end of the capacitor is connected with the high-voltage input end;
the output end is connected with the grid electrode of the transistor through a first resistor;
Wherein X represents a voltage value, the value range is 4.5-5.5, V represents a voltage unit, and the voltage value range of the high-voltage input end is 12-60V.
As an optional solution, the high-voltage to XV circuit includes a linear voltage regulator configured to: the input end is sequentially connected with one end of the first capacitor and the emitter of the triode, the adjusting end is simultaneously connected with one end of the second resistor and one end of the third resistor, and the output end is sequentially connected with the other end of the second resistor and one end of the second capacitor;
The other end of the second capacitor, the other end of the third resistor and the other end of the first capacitor are connected with the input end of the diode, the output end of the diode is sequentially connected with the base electrode of the triode and one end of the first resistor, the other end of the first resistor is simultaneously connected with the high-voltage input end and the collector electrode of the triode, and the common end of the second resistor and the second capacitor is the XV voltage output end of the high-voltage XV conversion circuit.
As an alternative solution, the linear voltage regulator uses an LM317T chip.
As an optional solution, the high-voltage conversion-XV circuit includes a DC-DC power chip configured to: the CAP+ pin is connected with the CAP-pin through a second capacitor, the GND pin is grounded, the OUT pin is used as an-XV voltage output end in the high-voltage conversion-XV circuit and is grounded through a third capacitor, the LV pin is grounded, and the V+ pin is grounded through a first capacitor; the common end of the V+ pin and the first capacitor is connected with XV voltage.
As an alternative solution, the DC-DC power chip uses an LM2662 chip.
As an optional technical scheme, the DAC reference voltage generating circuit converts XV voltage at the output end of the high-voltage XV converting circuit into 2.5V voltage, and the conversion is realized through an ADR431 chip.
As an optional technical scheme, the DAC supply voltage generating circuit converts the voltage at the output end of the high voltage to the voltage of 3.3V, which is implemented by the LT3045 chip.
As an optional technical scheme, the power supply circuit further comprises a scaling circuit, wherein the input end of the scaling circuit is connected with the arbitrary waveform output end of the arbitrary waveform generating circuit, and the output end of the scaling circuit is connected with the positive input end of a high-voltage operational amplifier in the output voltage control circuit.
As an alternative solution, the scaling circuit is powered by a high voltage to XV circuit.
As an optional solution, the scaling circuit includes an operational amplifier, where the operational amplifier is configured to:
The positive power supply is connected with the XV voltage and grounded through the first capacitor;
The negative power supply is grounded;
the negative input end is connected with the arbitrary waveform output end of the arbitrary waveform generating circuit;
the positive input end is connected with the output end and the first resistor;
the output end is sequentially connected with a first resistor, a second resistor and ground in series, and the second resistor is connected with a second capacitor in parallel; and the common end of the second capacitor and the first resistor is used as the output end of the scaling circuit.
The beneficial effects of the application include:
The variable waveform output voltage waveform is generated by a high precision DAC chip. The control module is communicated with the DAC chip, and inputs a control quantity D (D is a decimal value of a control output voltage register in the DAC) into the DAC chip according to a preset time interval, and changes the output voltage according to the continuous change of D, so that any waveform is generated. The waveform is scaled down to a fixed voltage by a scaling down circuit, and the control of the output voltage and the output current is realized by a voltage control circuit consisting of an NMOS, a high-voltage operational amplifier and a feedback network, so that the power supply waveform with variable output waveform is realized; the circuit structure is clear, and the circuit size is smaller, and the problem that the ATE of the traditional testing machine can not be carried is solved.
Other benefits or advantages of the application will be described in detail with reference to specific structures in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art. Furthermore, it should be understood that the scale of each component in the drawings in this specification is not represented by the scale of actual material selection, but is merely a schematic diagram of structures or positions, in which:
FIG. 1 is a basic functional block diagram of a circuit in the present application;
FIG. 2 is a schematic diagram of the power flow inside the power generation circuit according to the present application;
FIG. 3 is a schematic diagram of a high voltage to 5V circuit in an embodiment;
FIG. 4 is a schematic diagram of a high voltage-to-5V circuit in an embodiment;
FIG. 5 is a schematic diagram of an arbitrary waveform generation circuit according to an embodiment;
FIG. 6 is a schematic diagram of a scaling circuit in an embodiment;
FIG. 7 is a schematic diagram of an output voltage control circuit according to an embodiment;
FIG. 8 is a schematic diagram of a DAC reference voltage generation circuit in an embodiment;
Fig. 9 is a schematic diagram of a DAC supply voltage generation circuit in an embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that terms such as "top" and "bottom" are used to refer to the present application in which the portion near the upper side is the top and the portion near the lower side is the bottom in the use state; the use of terms such as "first" and "second" is for the purpose of distinguishing between similar elements and not necessarily for the purpose of indicating or implying any particular importance or order of such elements; terms such as "inner", "outer" and "inner and outer" are used to refer to specific contours. The above terms are used only for the convenience of clearly and simply describing the technical solution of the present application and are not to be construed as limiting the present application.
Examples:
In order to overcome the defect that the conventional linear power supply cannot meet the requirement of a large voltage range and control output of any waveform, the linear power supply is shown in fig. 1 and 2; the invention designs and manufactures a linear power supply generating circuit with wide voltage (up to 60V) and output arbitrary waveforms based on the technologies of high-voltage operational amplifier, high-withstand-voltage power NMOS (N-channel metal oxide semiconductor) transistor, mirror current source and the like, and is used for solving the control problem of power supply voltage waveforms in the existing equipment.
The main block diagram of the circuit is as shown in fig. 1:
The power supply generating circuit includes a high voltage input terminal and a waveform output terminal, in this embodiment, preferably X is 5, and the voltage of the high voltage input terminal is 60V, where:
The high-voltage input end is connected with the input end of a high-voltage conversion 5V circuit, the high-voltage conversion 5V circuit converts the high voltage of the high-voltage input end into 5V voltage, and the output end of the high-voltage conversion 5V circuit is respectively connected with the high-voltage conversion 5V circuit, the DAC reference voltage generating circuit, the DAC power supply voltage generating circuit and the output voltage control circuit;
the high-voltage conversion-XV circuit converts XV voltage at the output end of the high-voltage conversion-XV circuit into-XV voltage, and the output end of the high-voltage conversion-XV circuit is connected with the output voltage control circuit;
the DAC reference voltage generation circuit converts XV voltage at the output end of the high-voltage XV conversion circuit into 2.5V voltage, and the output end voltage of the DAC reference voltage generation circuit is used as the reference voltage of the arbitrary waveform generation circuit; the DAC power supply voltage generation circuit converts the voltage at the output end of the high-voltage XV conversion circuit into 3.3V voltage, and the voltage at the output end of the DAC power supply voltage generation circuit is used as the power supply voltage of the arbitrary waveform generation circuit;
As a possible implementation solution, the main function of the high voltage to 5V circuit is to supply power as part of the internal circuit. The working principle diagram of the high-voltage-to-5V circuit is shown in the circuit in FIG. 3, and the circuit mainly comprises an NPN triode, a voltage stabilizing diode, a linear voltage stabilizer and a resistance-capacitance element;
The method comprises the following steps: the high-voltage to 5V circuit comprises a linear voltage stabilizer, wherein the linear voltage stabilizer adopts an LM317T chip, and the LM317T chip is configured to: the in pin 3 is sequentially connected with one end of the first capacitor C1 and the emitter 3 of the triode, the ADJ pin 1 is simultaneously connected with one end of the second resistor R2 and one end of the third resistor R3, and the out pin 2 is sequentially connected with the other end of the second resistor R2 and one end of the second capacitor C2;
The other end of the second capacitor C2, the other end of the third resistor R3 and the other end of the first capacitor C1 are connected with the input end of the diode D1, the output end of the diode D1 is sequentially connected with the base electrode 1 of the triode and one end of the first resistor R1, the other end of the first resistor R1 is simultaneously connected with the high-voltage input end and the collector electrode 2 of the triode, and the public end of the second resistor R2 and the second capacitor C2 is a 5V voltage output end of a high-voltage-to-5V circuit.
The NPN triode and the diode D1 form a voltage reduction network (the diode D1 adopts a voltage stabilizing diode), and the problem of low input voltage range of the linear voltage stabilizer LM317T is solved. And the triode is used for reducing the voltage, so that the heat power consumption can be dispersed, and the junction temperature of the linear voltage stabilizer is prevented from exceeding the range due to overlarge power consumption.
After the circuit stably works, the voltage of the high-voltage input end at the point A is clamped to the regulated voltage V ZT through the first resistor R1 and the diode D1, and the value is the regulated value of the diode D1. A PN junction voltage difference exists between the point B and the point A, so that the voltage of the point B is the stabilized voltage V ZT minus the voltage difference between the base electrode and the emitter electrode of the NPN triode, thereby achieving the purpose of reducing the high voltage input voltage.
The voltage formed at point B satisfies the input voltage range of the linear regulator. The relation between the output voltage V OUT of the linear regulator LM317T and the feedback resistor (the second resistor R2 and the third resistor R3 are feedback resistors) is:
Where I ADJ is the current at the ADJ pin, which is very small, about 0.2uA, and can be reduced to:
in the formula, V REF is a reference voltage, V REF =1.25v, and the output voltage can be configured to be about 5.0V by configuring r3=72Ω and r2=430Ω.
As a possible technical scheme, the working principle diagram of the high-voltage converting-5V circuit is shown in the circuit in fig. 4, and the part is mainly realized by a DC-DC power supply chip LM2662, and converts 5V voltage into-5V voltage; the output end of the power supply is connected with an output voltage control circuit;
The method comprises the following steps: the DC-DC power supply chip LM2662 is configured to: the CAP+ pin 2 is connected with the CAP-pin 4 through a second capacitor, the GND pin 3 is grounded, the OUT pin 5 is used as an-XV voltage output end in a high-voltage conversion-XV circuit and is grounded through a third capacitor, the LV pin 6 is grounded, and the V+ pin 8 is grounded through a first capacitor; wherein, the common terminal of V+ pin 8 and first electric capacity connects XV voltage.
As a possible implementation solution, the main circuit diagram of the arbitrary waveform generation circuit is shown in the circuit in fig. 5, and the arbitrary waveform generation circuit is mainly composed of a DAC chip, preferably an AD5541 chip; the principle is that the control module completes the editing function of the waveform through real-time control of the output voltage of the DAC chip, so that the output generates any waveform desired by the program.
The conversion relation formula of the DAC output voltage and the data thereof is as follows:
In this circuit, V REF =2.5v, n=16, n is the number of bits D of the DAC chip AD5541, which is the decimal value of the control output voltage register in the DAC chip.
The above formula is converted into:
The control module is communicated with the DAC chip, and the control quantity D is input into the DAC chip according to a preset time interval, so that the voltage of an output port of the DAC chip is changed in real time, the function of waveform editing is realized, and sine waves, square waves, triangular waves and pulses can be realized or various waveform outputs can be produced according to actual requirements;
As a possible technical scheme, the high-voltage operational amplifier further comprises a scaling circuit, wherein the input end of the scaling circuit is connected with the arbitrary waveform output end of the arbitrary waveform generating circuit, and the output end of the scaling circuit is connected with the positive input end of the high-voltage operational amplifier in the output voltage control circuit. The main circuit diagram of the scaling circuit is shown in the circuit of fig. 6, and the scaling circuit is mainly composed of an operational amplifier and a resistor. The operational amplifier is configured as a follower and is configured as a unity gain. The formula of the output voltage V OUT and the positive input voltage V IN of the circuit is as follows:
Specifically, the scaling circuit is powered by a high voltage to 5V circuit. The scaling circuit includes an operational amplifier, and in fig. 6, the operational amplifier is configured to:
The pin 7 is used as a positive power end of the operational amplifier, is connected with 5V voltage and is grounded through the first capacitor C1;
Pin 4 is used as the negative power supply end of the operational amplifier and grounded;
The pin 2 is used as a negative input end of the operational amplifier and is connected with an arbitrary waveform output end of an arbitrary waveform generating circuit;
pin 3 is used as the positive input end of the operational amplifier, and is connected with pin 6 and the first resistor;
The pin 6 is used as an output end of the operational amplifier and is sequentially connected with a first resistor, a second resistor and ground in series, and the second resistor is connected with a second capacitor in parallel; and the common end of the second capacitor and the first resistor is used as the output end of the scaling circuit.
As a possible implementation solution, the output voltage control circuit is shown in the circuit in fig. 7, and the output voltage control circuit mainly includes an NMOS power tube, a high voltage operational amplifier, and a feedback network. After the circuit works stably, the operational amplifier works in a deep negative feedback state, and according to the theoretical analysis of 'virtual short and virtual break', the output voltage V OUT of the high-voltage operational amplifier is as follows:
Wherein V IN is the positive input terminal voltage of the high-voltage operational amplifier;
Therefore, the circuit structure can amplify the output voltage in the figure 6 in equal proportion, and the output slope of VOUT of all the structures is fixed due to the fixed slope, so that the function of adjustable output slope is realized. By changing the proportional relation between the second resistor R2 and the third resistor R3, the maximum value of the output voltage V OUT of the circuit can be controlled.
Specifically, as shown in fig. 7: in the output voltage control circuit, a high voltage operational amplifier is included, the high voltage operational amplifier being configured to:
pin 1 is used as an enabling common end of the high-voltage operational amplifier and is grounded;
pin 8 is used as the enabling end of the high voltage operational amplifier, grounded through the third capacitor and supplied by the high voltage to XV circuit
The pin 2 is used as a negative input end of the high-voltage operational amplifier and is simultaneously connected with one end of a second resistor and one end of a third resistor, the other end of the second resistor is connected with the source electrode of the transistor, and the other end of the third resistor is grounded;
The pin 3 is used as a positive input end of the high-voltage operational amplifier and is connected with a falling slope output end of the falling waveform generating circuit;
pin 4 is used as the negative power supply end of the high-voltage operational amplifier, is grounded through a second capacitor and is powered by the high-voltage transfer-XV circuit;
The pin 7 is used as a positive power end of the high-voltage operational amplifier and is connected with one end of the first capacitor and the drain electrode of the transistor, and the other end of the capacitor is connected with the high-voltage input end;
the pin 6 is used as an output end of the high-voltage operational amplifier and is connected with the grid electrode of the transistor through a first resistor;
As a possible implementation solution, the DAC reference voltage generating circuit converts the voltage at the output end of the high-voltage to XV circuit into 0.5XV voltage, and is implemented by an ADR431 chip, where the main circuit diagram is shown in the circuit in fig. 8, and the ADR431 chip is configured to:
the pin 2 is connected with one end of the first capacitor C1 and is powered by a high-voltage to 5V circuit;
The pin 4 is connected with the other end of the first capacitor C1 and grounded; pin 6 is grounded through the second capacitor C2, and the common end of the output end of the chip ADR431 and the second capacitor C2 is the output end of the DAC reference voltage generating circuit, which is connected with the REF pin (reference voltage pin) in the DAC chip, to provide 2.5V reference voltage for the DAC chip.
As an alternative solution, the DAC supply voltage generating circuit converts the voltage at the output end of the high-voltage converting-XV circuit into 3.3 voltage, which is implemented by an LT3045 chip, where the main circuit diagram is shown in the circuit in fig. 9, and the LT3045 chip is configured to:
the pin 1, the pin 2, the pin 4 and the pin 4 are connected with the pin 7 and the 5V voltage and are grounded through a second resistor C2;
pin 6 and pin 9 are grounded;
pin 1, pin 11 and pin 12 are all grounded through a first capacitor C1 and output 3.3V voltage;
Pin 8 is grounded through resistor R1, and resistor R1 is connected in parallel with third capacitor C3.
In summary, the main principle of the output arbitrary waveform control function is as follows: the variable waveform output voltage waveform is generated by a high precision DAC chip. The control module is communicated with the DAC chip, and inputs a control quantity D (D is a decimal value of a control output voltage register in the DAC) into the DAC chip according to a preset time interval, and changes the output voltage according to the continuous change of D, so that any waveform is generated. And then the waveform is scaled down to a fixed voltage by a scaling down circuit, and then the control of the output voltage and the output current is realized by a voltage control circuit consisting of an NMOS, a high-voltage operational amplifier and a feedback network, so that the power supply waveform with variable output waveform is realized.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The utility model provides a wide voltage, output waveform variable's linear power supply generating circuit which characterized in that, power supply generating circuit includes high voltage input and waveform output, wherein:
the high-voltage input end is connected with the input end of the high-voltage conversion XV circuit, the high-voltage conversion XV circuit converts the high voltage of the high-voltage input end into XV voltage, and the output end of the high-voltage conversion XV circuit is respectively connected with the high-voltage conversion-XV circuit, the DAC reference voltage generating circuit, the DAC power supply voltage generating circuit and the output voltage control circuit;
the high-voltage conversion-XV circuit converts XV voltage at the output end of the high-voltage conversion-XV circuit into-XV voltage, and the output end of the high-voltage conversion-XV circuit is connected with the output voltage control circuit;
the DAC reference voltage generation circuit converts XV voltage at the output end of the high-voltage XV conversion circuit into 2.5V voltage, and the output end voltage of the DAC reference voltage generation circuit is used as the reference voltage of the arbitrary waveform generation circuit; the DAC power supply voltage generation circuit converts the voltage at the output end of the high-voltage XV conversion circuit into 3.3V voltage, and the voltage at the output end of the DAC power supply voltage generation circuit is used as the power supply voltage of the arbitrary waveform generation circuit;
The arbitrary waveform generation circuit comprises a control module and a DAC chip, wherein the control module is communicated with the DAC chip, a control quantity D is input to the DAC chip according to a preset time interval, the output end of the DAC chip is grounded through a capacitor, and the common end of the output end of the DAC chip and the capacitor is an arbitrary waveform output end of the arbitrary waveform generation circuit, wherein D is a decimal value of a control output voltage register in the DAC chip;
the output voltage control circuit comprises a high-voltage operational amplifier, wherein the high-voltage operational amplifier is configured to:
enabling the common ground;
the enabling end is grounded through a third capacitor and is supplied by a high-voltage conversion XV circuit
The negative input end is simultaneously connected with one end of a second resistor and one end of a third resistor, the other end of the second resistor is connected with the source electrode of the transistor, and the other end of the third resistor is grounded;
the positive input end is connected with the arbitrary waveform output end of the arbitrary waveform generating circuit;
the negative power supply end is grounded through a second capacitor and is powered by the high-voltage transfer-XV circuit;
The positive power supply end is connected with one end of the first capacitor and the drain electrode of the transistor at the same time, and the other end of the first capacitor is connected with the high-voltage input end;
the output end is connected with the grid electrode of the transistor through a first resistor;
Wherein X represents a voltage value, the value range is 4.5-5.5, V represents a voltage unit, and the voltage value range of the high-voltage input end is 12-60V.
2. The power generation circuit of claim 1, wherein the high voltage to XV circuit comprises a linear regulator configured to: the input end is sequentially connected with one end of the first capacitor and the emitter of the triode, the adjusting end is simultaneously connected with one end of the second resistor and one end of the third resistor, and the output end is sequentially connected with the other end of the second resistor and one end of the second capacitor;
The other end of the second capacitor, the other end of the third resistor and the other end of the first capacitor are connected with the input end of the diode, the output end of the diode is sequentially connected with the base electrode of the triode and one end of the first resistor, the other end of the first resistor is simultaneously connected with the high-voltage input end and the collector electrode of the triode, and the common end of the second resistor and the second capacitor is the output end of the high-voltage XV conversion circuit.
3. The power generation circuit of claim 2, wherein the linear voltage regulator employs an LM317T chip.
4. The power generation circuit of claim 1, wherein the high voltage trans-XV circuit comprises a DC-DC power chip configured to: the CAP+ pin is connected with the CAP-pin through a second capacitor, the GND pin is grounded, the OUT pin is used as an-XV voltage output end in the high-voltage conversion-XV circuit and is grounded through a third capacitor, the LV pin is grounded, and the V+ pin is grounded through a first capacitor; the common end of the V+ pin and the first capacitor is connected with XV voltage.
5. The power generation circuit of claim 4, wherein the DC-DC power chip employs an LM2662 chip.
6. The power generation circuit of claim 4 wherein the DAC reference voltage generation circuit converts the XV voltage at the output of the high-voltage-to-XV circuit to 2.5V voltage, implemented by an ADR431 chip.
7. The power supply generating circuit according to claim 4, wherein the DAC supply voltage generating circuit converts the voltage at the output terminal of the high voltage-to-XV circuit into 3.3V voltage, which is implemented by an LT3045 chip.
8. The power generation circuit of claim 1, further comprising a scaling circuit having an input terminal coupled to an arbitrary waveform output terminal of the arbitrary waveform generation circuit and an output terminal coupled to a positive input terminal of a high voltage operational amplifier in the output voltage control circuit.
9. The power generation circuit of claim 8, wherein the scaling circuit is powered by a high voltage to XV circuit.
10. The power generation circuit of claim 8, wherein the scaling circuit comprises an operational amplifier configured to:
The positive power supply is connected with the XV voltage and grounded through the first capacitor;
The negative power supply is grounded;
the negative input end is connected with the arbitrary waveform output end of the arbitrary waveform generating circuit;
the positive input end is connected with the output end and the first resistor;
the output end is sequentially connected with a first resistor, a second resistor and ground in series, and the second resistor is connected with a second capacitor in parallel; and the common end of the second capacitor and the first resistor is used as the output end of the scaling circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410492577.2A CN118092572B (en) | 2024-04-23 | 2024-04-23 | Linear power supply generating circuit with variable wide voltage and output waveform |
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| CN104699158B (en) * | 2015-02-09 | 2017-05-17 | 深圳市科曼医疗设备有限公司 | Power supply circuit for constant current source |
| RU202966U1 (en) * | 2020-12-01 | 2021-03-17 | Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр "Кольский научный центр Российской академии наук" (ФИЦ КНЦ РАН) | HIGH VOLTAGE STABILIZED POWER SUPPLY |
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| 一种仿峰值电流模式、宽输入电压范围的BUCK型电源设计;蒋婷;曹正州;;电子与封装;20201020(10);全文 * |
| 高精度连续可调高压开关电源的设计;储开斌;宋长加;陈树越;;微型机与应用;20120625(12);全文 * |
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