CN115955200B - Amplifier circuit, amplifier and electronic equipment - Google Patents
Amplifier circuit, amplifier and electronic equipment Download PDFInfo
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- CN115955200B CN115955200B CN202211740664.2A CN202211740664A CN115955200B CN 115955200 B CN115955200 B CN 115955200B CN 202211740664 A CN202211740664 A CN 202211740664A CN 115955200 B CN115955200 B CN 115955200B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application provides an amplifier circuit, an amplifier and an electronic device, wherein the amplifier circuit includes: amplifying circuit, matching circuit, isolation circuit and first inductance, wherein: the output end of the amplifying circuit is respectively connected with the isolating circuit and the matching circuit; the matching circuit is connected with the isolation circuit in parallel and is grounded through the first inductor respectively; the first inductor multiplexes the matching circuit and the isolation circuit to form a first filter circuit, and the first filter circuit is used for filtering signals output by the output end of the amplifying circuit.
Description
Technical Field
The present application relates to the field of circuits, and relates to, but is not limited to, an amplifier circuit, an amplifier, and an electronic device.
Background
The amplifier is an important module of the radio frequency front-end circuit, with the advent of the fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G), the communication protocol is more and more complex, and the performance requirements on the inside and outside of the frequency band are also higher and higher, so that the amplifier is required to have high gain, low noise coefficient and high linearity in a wider working frequency band range, and meanwhile, a certain inhibition effect on out-of-band interference signals can be realized to ensure the receiving sensitivity. In the prior art, in order to suppress out-of-band interference signals, an additional filter network is usually designed in an input or output matching network to realize interference suppression of a specific frequency band; thus, the phenomena of complexity of circuit design and increase of area of chip are easy to occur.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, embodiments of the present application provide an amplifier circuit, an amplifier, and an electronic device, where an inductor is added to a common ground, and an isolation circuit and a matching circuit in the inductor multiplexing amplifier circuit are used to form a filter circuit; thus, the filtering circuit can be used for filtering the interference signals in the low-frequency specific frequency range in the amplifier circuit; therefore, only one inductor is added in the amplifier circuit, so that the complexity and difficulty of the amplifier circuit in the circuit design process (such as suppression of interference signals at low frequency) can be reduced, and meanwhile, the chip layout area corresponding to the amplifier circuit can be saved, and the design cost corresponding to the amplifier circuit can be further reduced.
In a first aspect, embodiments of the present application provide an amplifier circuit, the amplifier circuit comprising: amplifying circuit, matching circuit, isolation circuit and first inductance, wherein: the output end of the amplifying circuit is respectively connected with the isolating circuit and the matching circuit; the matching circuit is connected with the isolation circuit in parallel and is grounded through the first inductor respectively; the first inductor multiplexes the matching circuit and the isolation circuit to form a first filter circuit, and the first filter circuit is used for filtering signals output by the output end of the amplifying circuit.
In some embodiments, the matching circuit comprises: an L-shaped impedance matching circuit consisting of a first capacitor and a second inductor; the isolation circuit comprises a second capacitor and a third inductor, wherein the first inductor multiplexes the first capacitor and the third inductor to form the filter circuit; the inductance value of the third inductor is larger than that of the first inductor.
In some embodiments, the L-shaped impedance matching circuit and the third inductor in the isolation circuit form a second filter circuit, wherein: the second filter circuit is used for outputting signals which are larger than a preset frequency threshold value in the signals output by the output end of the amplifying circuit; the preset frequency threshold is associated with the inductance value of the second inductor and the inductance value of the third inductor.
In some embodiments, the second capacitor is configured to provide a loop for an ac signal output by the signal amplifying sub-circuit and transmitted along the third inductor.
In some embodiments, the first inductor is an inductor with an adjustable inductance value.
In some embodiments, the first inductor comprises: an inductor formed by metal winding on the substrate; the substrate is a packaging substrate for setting a chip corresponding to the amplifier circuit.
In some embodiments, the number of the matching circuits is at least two, and each matching circuit is connected in parallel, and the number of the first inductors is at least two; each matching circuit is grounded through a first inductor connected in series with each matching circuit, and the isolation circuit is connected with each second inductor and is grounded through each inductor.
In some embodiments, the inductance value of each first inductor is different.
In a second aspect, embodiments of the present application provide an amplifier, which at least includes an amplifier circuit according to any of the embodiments described above.
In a third aspect, an embodiment of the present application provides an electronic device, where the electronic device at least includes the amplifier provided in the foregoing embodiment.
The application provides an amplifier circuit, an amplifier and electronic equipment, wherein, this amplifier circuit includes: amplifying circuit, matching circuit, isolation circuit and first inductance, wherein: the output end of the amplifying circuit is respectively connected with the isolating circuit and the matching circuit; the matching circuit is connected with the isolation circuit in parallel and is grounded through the first inductor respectively; the first inductor multiplexes the matching circuit and the isolation circuit to form a first filter circuit, and the first filter circuit is used for filtering signals output by an output end of the amplifying circuit; therefore, by adding an inductor at the common grounding end and adopting the isolation circuit and the matching circuit in the inductance multiplexing amplifier circuit, the filtering of the interference signals in the low-frequency specific frequency range in the amplifier circuit can be realized; in this way, the complexity and difficulty of the amplifier circuit in the circuit design process (such as suppression of interference signals at low frequency) can be reduced, and meanwhile, the chip layout area corresponding to the amplifier circuit can be saved, so that the design cost corresponding to the amplifier circuit can be reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the aspects of the present application.
Drawings
In the drawings (which are not necessarily drawn to scale), like numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different instances of similar components. The drawings illustrate generally, by way of example and not by way of limitation, various embodiments discussed herein.
FIG. 1 is a schematic diagram of an alternative circuit for implementing out-of-band interference signals based on an LC resonant network in accordance with the related art;
FIG. 2 shows a first alternative circuit schematic of an amplifier circuit provided by an embodiment of the present application;
FIG. 3A shows a second alternative circuit schematic of an amplifier circuit provided by embodiments of the present application;
fig. 3B is a schematic circuit connection diagram of a part of components in the amplifier circuit according to the embodiment of the present application;
fig. 4 is a schematic circuit diagram of a common mode grounding inductor including an adjustable inductance value in an amplifier circuit according to an embodiment of the present application;
fig. 5 shows a schematic circuit diagram of an amplifier circuit including a two-stage matching network sub-circuit according to an embodiment of the present application;
fig. 6 shows a schematic diagram of the composition structure of an amplifier provided in an embodiment of the present application;
fig. 7 shows a schematic diagram of a composition structure of an electronic device provided in an embodiment of the present application;
wherein, the reference numerals illustrate:
1-electronic device, 10-amplifier, 100-amplifier circuit, 101-amplifier circuit, 102-matching circuit, 1021-first capacitance, 1022-second inductance, 103-isolation circuit, 1031-second capacitance, 1032-third inductance, 104-first inductance.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the prior art, it is common to design additional filter networks in either the input matching network or the output matching network, such as: an Inductance-Capacitance (LC) notch network and an LC resonance network are used for filtering interference signals in a certain frequency range outside the band; thus, the complexity and design difficulty of the matching network structure are greatly increased. Meanwhile, suppression of interference signals at low-frequency is realized by using an on-chip inductor or capacitor with a larger magnitude; thus, the area of the chip (Die) is greatly increased, which is disadvantageous in high integration and low cost. Here, as shown in fig. 1, an alternative circuit schematic for implementing an out-of-band interference signal based on an LC resonant network in the related art is shown; wherein the power supply terminal VDD is used to power a low noise amplifier (Low Noise Amplifier, LNA), and Cbypass is used to filter the ac signal flowing to VDD to avoid its influence on VDD. Meanwhile, a high-frequency choke inductor Lchoke is arranged between the amplifier LNA and the VDD; and, at least pass through a resonant network part and a Matching network part (Matching) before the signal output of the amplifier LNA, wherein the Matching network part is an impedance Matching circuit in the output Matching network of the amplifier LNA.
Based on this, the embodiment of the application provides an amplifier circuit, an amplifier and an electronic device, which are configured by adding an inductor at a common ground terminal and multiplexing an isolation circuit and a matching circuit with the inductor to form a filter circuit; thus, the filtering circuit can be used for filtering the interference signals in the low-frequency specific frequency range in the amplifier circuit; in this way, only one inductor is added in the amplifier circuit, so that the complexity and difficulty of the amplifier circuit in the circuit design process (such as suppression of interference signals at low frequency) can be reduced, and meanwhile, the chip layout area corresponding to the amplifier circuit can be saved, and further, the design cost corresponding to the amplifier circuit can be reduced.
Example 1
As shown in fig. 2, a first alternative circuit schematic of an amplifier circuit provided in an embodiment of the present application is shown, where the amplifier circuit 100 includes: an amplifying circuit 101, a matching circuit 102, an isolation circuit 103, and a first inductor 104, wherein:
the output end of the amplifying circuit 101 is respectively connected with the isolating circuit 103 and the matching circuit 102; wherein, the matching circuit 102 is connected in parallel with the isolation circuit 103 and is grounded through the first inductor 104 respectively;
the first inductor 104 multiplexes the matching circuit 102 and the isolation circuit 103 to form a first filter circuit, where the first filter circuit is configured to filter a signal output from an output end of the amplifying circuit 101.
In some embodiments, the amplifying circuit 101 may be a transistor for realizing signal amplification; here, the transistor includes, but is not limited to: triode, field effect transistor, etc.
In some embodiments, the amplifying circuit 101 may be a Power Amplifier (PA) or a low noise Amplifier (Low Noise Amplifier, LNA).
It should be noted that PA is an amplifier that can generate maximum power output to drive a load under a given distortion rate. Meanwhile, the LNA is mainly used in the design of a receiving circuit, and the input signal-to-noise ratio is equal to the output signal-to-noise ratio.
In some embodiments, the matching circuit 102 may be an impedance matching circuit in an output matching network of the amplifying circuit 101; the matching circuit 102 may be an L-type impedance matching circuit composed of a capacitor and an inductor.
It should be noted that, in the case where the matching circuit 102 is an L-shaped impedance matching circuit composed of a capacitor and an inductor, the capacitance value of the capacitor and the inductance value of the inductor included in the matching circuit 102 may depend on the actual requirement of the amplifier circuit 100.
In some embodiments, the number of matching circuits 102 included in the amplifier circuit 100 may be one, or two or more; when the number of the matching circuits 102 included in the amplifier circuit 100 is two or more, the components included in each matching circuit 102 may be the same or may be partially the same.
Here, in the case where the amplifier circuit 100 includes two or more matching circuits 102, each matching circuit 102 may be connected in series with one first inductor 104, respectively, wherein each first inductor 104 may be different; or, each matching circuit 102 is connected in parallel with a first inductor 104.
In some embodiments, the inductance in the isolation circuit 103 may be a common mode inductance (which is also referred to as a choke inductance, choke coil); illustratively, the inductance of the inductance in the isolation circuit 103 may be 1.0 to 2.0nH.
Accordingly, the first inductor 104 may be an inductor having an inductance value of 0.1 to 0.3 nH.
Here, the capacitance in the isolation circuit is also used to implement a matching function in the amplifier circuit 100.
The common mode inductance not only generally plays roles of energy storage, traffic isolation, filtering and the like in a circuit, but also plays roles of suppressing electromagnetic interference in the circuit.
In some embodiments, the first inductor 104 may be an inductor with an adjustable inductance value.
In some embodiments, the capacitor in the isolation circuit 103 may be a decoupling capacitor, which may be equivalent to an ac short circuit in the required operating frequency band of the amplifier circuit 100, and the corresponding capacitance value may depend on the practical application of the amplifier circuit 100; illustratively, the capacitance of the capacitor in the isolation circuit 103 may be 20 to 70pF.
In some embodiments, the amplifying circuit 101 is configured to amplify a signal input to the amplifier circuit 100, that is, the input signal, which may be gain amplified, to obtain an amplified signal. In some embodiments, in the amplifier circuit 100, the matching circuit 102, the isolation circuit 103 and the first inductor 104 are regarded as a whole, that is, they are regarded as a filtering network, that is, a first filtering circuit, and based on the first filtering circuit, signals in a preset frequency band are filtered from signals output from an output end of the amplifying circuit 101; the preset frequency band is associated with an inductance value of the first inductor 104.
Here, the first filter circuit may be configured to generate a resonance point at a frequency of the low frequency of the amplifier circuit 100 and further filter the frequency.
In some embodiments, the inductor in the isolation circuit 103, the matching circuit 102 may be connected with the amplifying circuit 101 at a common node; thus, the inductor in the isolation circuit 103 and the matching circuit 102 can form a pi-type high-pass filter network together; based on the pi-type high-pass filter network, the first inductor 104 is added to the common ground terminal; in this way, the first inductor 104 can be used to multiplex the inductor in the isolation circuit 103 and the matching circuit 103 to form a low-frequency filter circuit, so that a resonance point can be generated at a certain low frequency based on the low-frequency filter circuit, and then the signal output by the output end of the amplifying circuit 101 is subjected to low-frequency filtering; here, as the inductance value of the first inductor 104 increases, the corresponding resonance point moves toward the high frequency position.
A high-pass filter network is a network circuit that allows signals with frequencies above a certain frequency threshold to pass through and prevents signals below the certain frequency threshold from passing through.
In some embodiments, in the amplifier circuit 100 having the output matching circuit 102 and the isolation circuit 103, by adding an inductance to the common ground, that is, the first inductance 104 provided in the above embodiments, the matching circuit 102 and the isolation circuit 103 connected to the external power supply are multiplexed by using the first inductance 104; wherein the external power supply supplies power to the amplifying circuit 101; in this way, filtering of the interference signal in the low frequency specific frequency band range in the amplifier circuit 100 can be achieved; thus, compared with the prior art, by designing an additional filter network in the input matching network or the output matching network, for example: the LC notch network and the LC resonance network are used for filtering interference signals in a certain specific frequency range outside the band; the complexity and difficulty of the amplifier circuit 100 in the circuit design process (for suppressing the interference signal at the low frequency) can be reduced, and meanwhile, the chip layout area corresponding to the amplifier circuit 100 can be saved, so that the design cost corresponding to the amplifier circuit can be reduced.
An amplifier circuit provided in an embodiment of the present application includes: amplifying circuit, matching circuit, isolation circuit and first inductance, wherein: the output end of the amplifying circuit is respectively connected with the isolating circuit and the matching circuit; the matching circuit is connected with the isolation circuit in parallel and is grounded through the first inductor respectively; the first inductance multiplexing matching circuit and the isolation circuit form a first filter circuit, and the first filter circuit is used for filtering signals output by the output end of the amplifying circuit; thus, an inductor is added at the public grounding end, and the inductor is adopted to multiplex the isolation circuit and the matching circuit so as to form a filter circuit; in this way, the filtering circuit can be used for filtering the interference signals in the low-frequency specific frequency range in the amplifier circuit; in this way, the complexity and difficulty of the amplifier circuit in the circuit design process (such as suppression of interference signals at low frequency) can be reduced, and meanwhile, the chip layout area corresponding to the amplifier circuit can be saved, so that the design cost corresponding to the amplifier circuit can be reduced.
Example two
Based on the foregoing embodiments, as shown in fig. 3A, a second alternative circuit schematic diagram of the amplifier circuit provided in the embodiment of the present application is shown, and the following description is made in conjunction with fig. 2 and 3A: wherein the amplifier circuit 100 comprises: an amplifying circuit 101, a matching circuit 102, an isolation circuit 103, and a first inductor 104, wherein: the output end of the amplifying circuit 101 is respectively connected with the isolating circuit 102 and the matching circuit 103; wherein, the matching circuit 102 is connected in parallel with the isolation circuit 103 and is grounded through the first inductor 104 respectively; the first inductor 103 multiplexes the matching circuit 102 and the isolation circuit 103 to form a first filter circuit, where the first filter circuit is configured to filter a signal output by an output end of the amplifying circuit 101; here, the matching circuit 102 may include: an L-shaped impedance matching circuit consisting of a first capacitor 1021 and a second inductor 1022; the isolation circuit 103 comprises a second capacitor 1031 and a third inductance 1032, wherein:
the first inductor 104 multiplexes the first capacitor 1021 and the third inductor 1032 to form the first filter circuit;
wherein, the inductance value of the third inductor 1032 is greater than the inductance value of the first inductor 104.
In some embodiments, the capacitance value of the first capacitor 1021 and the inductance value of the second inductor 1022 in the matching circuit 102 may depend on the actual requirement of the amplifier circuit 100. In this way, based on the second capacitor 1021 and the second inductor 1022 included in the matching circuit 102, and further on the basis that the matching circuit 102 is grounded through the first inductor 104 and the isolation circuit 103 (i.e., the third inductor 1031 and the second capacitor 1031) is grounded through the first inductor 104, the amplifier circuit 100 can generate a resonance point at a certain low frequency by adding the first inductor 104 to the common ground, and further can realize filtering of interference signals within a specific low frequency band range.
In some embodiments, the matching circuit 102 and the isolation circuit 103 are connected with the amplifying circuit 101 at a common node; correspondingly, the isolation circuit 103 includes: the third inductor 1032, the second capacitor 1031, and the matching circuit 102 includes: in the case of the first capacitor 1021 and the second inductor 1022, the connection relationship among the first inductor 104, the first capacitor 1021, the second inductor 1022, the third inductor 1032, and the second capacitor 1031 in the amplifier circuit 100 may be shown in fig. 3B, that is, fig. 3B shows a schematic circuit connection diagram of a part of components in the amplifier circuit provided in the embodiment of the present application; the second capacitor 1032 can be equivalently an ac short circuit in the required operating frequency band of the amplifier circuit 100, and the third inductor 1032, the first capacitor 1021 and the second inductor 1022 together form a pi-type filter network.
In some possible implementations, with continued reference to fig. 3A and fig. 3B, in the amplifier circuit 100 provided in the embodiment of the present application, the L-shaped impedance matching circuit (i.e. the matching circuit 102) provided in the foregoing embodiment may be capable of forming a second filter circuit with the third inductor 1032 in the isolation circuit 103, where:
the second filter circuit is used for outputting signals which are larger than a preset frequency threshold value in the signals output by the output end of the amplifying circuit.
In some embodiments, the preset frequency threshold is associated with an inductance value of the second inductor 1022, an inductance value of the third inductor 1032.
In some embodiments, the second filter circuit may be a pi-type high pass filter network; wherein the high pass filter network is a network circuit that allows signals with frequencies above a certain frequency threshold to pass through and prevents signals below the certain frequency threshold from passing through.
Meanwhile, referring to fig. 2, fig. 3A and fig. 3B, in the amplifier circuit 100 provided in the embodiment of the present application, the second capacitor 1021 in the isolation circuit 102 may be a decoupling capacitor, that is, a circuit for providing a loop for separating an ac signal, so that the obtained load substantially only includes a dc signal component; that is, in the amplifier circuit 100 provided in the embodiment of the present application:
the second capacitor 1031 is configured to provide a loop for the ac signal output by the amplifying circuit 101 and transmitted along the third inductor 1032.
In some possible implementations, the amplifier circuit 100 provided in the embodiments of the present application:
the first inductor 104 is an inductor with an adjustable inductance value.
Here, referring to fig. 4, a schematic circuit diagram of a common mode grounding inductor including an adjustable inductance value in an amplifier circuit according to an embodiment of the present application is shown; the common mode ground inductance is the first inductance 104. The first inductor 104 may be adjusted according to the frequency of the input signal, and may further perform filtering for different frequencies. Specifically, the first inductor 104 includes a plurality of parallel branches, each parallel branch includes an inductor and a switch, and the first inductor 104 selects a conductive parallel branch according to the frequency of the input signal, so as to adjust the inductance value.
In some embodiments, to enable the amplifier circuit 100 to filter the interference signal in the low frequency specific frequency range, the inductance value of the first inductor 104 may be set in the range of 0.1 to 0.3 nH. In practical applications, the amplifier circuit 100 is capable of filtering low frequency signals in the band7 (2500 to 2570 MHz) and band41 (2496 to 2690 MHz) with an inductance value of the first inductor 104 in the range of 0.1 to 0.3 nH.
In some possible implementations, the first inductor 104 may be implemented on a substrate through a metal wire (where Die corresponding to the amplifier circuit 100 is disposed on the substrate), that is, in the amplifier circuit 100 provided in the embodiments of the present application:
the first inductor 104 includes: an inductor formed by a metal wire on a substrate; the substrate is a package substrate for setting a chip corresponding to the amplifier circuit 100.
In some embodiments, the inductance formed by the metal wire on the substrate is determined as the first inductance 104 in the amplifier circuit 100 provided in the embodiments of the present application; thus, not only can a higher inductance quality factor (Q value) be achieved, that is, deterioration of the gain of the amplifier due to the insertion loss of the matching network itself can be reduced; and the layout area of the chip Die corresponding to the amplifier circuit can be reduced, and the cost can be saved.
The device structure according to the above embodiment may be placed at the corresponding input terminal of the amplifier circuit 100, or between stages of the multi-stage amplifier.
Example III
Based on the foregoing embodiments, the amplifier circuit 100 provided in the embodiments of the present application may include at least two matching circuits 102, where each matching circuit 102 is connected in parallel, and each matching circuit 102 is connected in series with a first inductor 104; in this way, filtering for interference signals in different frequencies can be realized in the amplifier circuit 100; as shown in fig. 5, a schematic circuit diagram of an amplifier circuit including two stages of matching network sub-circuits is shown in the embodiment of the present application (in fig. 5, the amplifier circuit 100 includes two stages of matching circuits 102 as an example, and in the practical application process, the amplifier circuit 100 may include two or more matching circuits 102, which is not illustrated here); wherein each matching circuit 102 includes a first capacitor 1021 and a second inductor 1022; that is, the amplifier circuit 100 provided in the embodiment of the present application includes: the amplifying circuit 101, the matching circuit 102, the isolation circuit 103, and the first inductor 104 may be described with reference to the above embodiments, where, in a case where the number of the matching circuits 102 is at least two, and each matching circuit 102 is connected in parallel, the number of the first inductors 104 is at least two:
each matching circuit 102 is grounded through a first inductor 104 connected in series with each matching circuit 102, and the isolation circuit 103 is connected to each first inductor 104 and is grounded through each first inductor 104.
In some embodiments, each matching circuit 102, i.e. an L-shaped impedance matching circuit consisting of a first capacitor 1021 and a second inductor 1022, forms a pi-shaped filter network corresponding to the isolation circuit 103; and, the pi-type filter network corresponding to each matching circuit 102 and the first inductor 104 form a corresponding first filter circuit, which can generate a resonance point at a certain frequency in a corresponding low frequency band, so as to filter the frequency.
In some possible implementations, the inductance value of each first inductor 104 is different.
In some embodiments, referring to the above description, because the inductance values of the first inductors 104 are different, the pi-type filter network corresponding to each matching circuit 102 and the first inductors 104 form a corresponding first filter circuit, which generates resonance points at different frequencies in a corresponding low frequency band, so that signals with different frequencies can be filtered simultaneously.
The embodiment of the present application further provides an amplifier 10, where the amplifier 10 includes at least the amplifier circuit 100 according to any one of the embodiments described above. As shown in fig. 6, a schematic diagram of the composition structure of an amplifier according to an embodiment of the present application is shown.
Here, the amplifier circuit 100 included in the amplifier 10 is configured to form a filter circuit by adding an inductance to a common ground and multiplexing an isolation circuit and a matching circuit in the amplifier circuit using the added inductance
A road; in this way, the filtering circuit can be used for filtering the interference 5 signal in the low-frequency specific frequency range in the amplifier circuit; thus, only one inductor is added in the amplifier circuit, and the amplifier can be reduced in the following steps
Complexity and difficulty in a circuit design process (such as suppression of interference signals at low frequency) can be reduced, and meanwhile, a chip layout area corresponding to the amplifier can be saved, so that design cost corresponding to the amplifier can be reduced.
The embodiment of the application further provides an electronic device 1, where the electronic device 1 includes at least the amplifier 10 as described in the above embodiment. As shown in fig. 7, a schematic diagram of a group 0 of electronic devices according to an embodiment of the present application is shown.
The electronic device 1 has similar technical descriptions and advantages as those of the corresponding embodiments of the amplifier circuit 100, and is limited in scope, and reference may be made to the descriptions of the corresponding embodiments of the amplifier circuit 100, so that the description thereof is omitted herein.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the details of one embodiment that are not described in detail in fig. 5 may be referred to in the related descriptions of other embodiments.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and the division of the units is merely a logical function division, and other division manners may be implemented in practice, for example
Such as multiple units or components may be combined or may be integrated into another system, or some features may be omitted, 0, or not performed. In another aspect, the coupling or direct coupling or communication connection shown or discussed with respect to each other may be
Such that the device or unit is indirectly coupled or communicatively coupled through some interface, whether in electrical or other form.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or 5 may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application.
Claims (10)
1. An amplifier circuit, the amplifier circuit comprising: amplifying circuit, matching circuit, isolation circuit and first inductance, wherein:
the output end of the amplifying circuit is respectively connected with the isolating circuit and the matching circuit; the matching circuit is connected with the isolation circuit in parallel and is grounded through the first inductor respectively, and the isolation circuit is used for connecting a power supply to feed the amplifying circuit;
the first inductor multiplexes the matching circuit and the isolation circuit to form a first filter circuit, and the first filter circuit is used for filtering signals output by the output end of the amplifying circuit.
2. The amplifier circuit of claim 1, wherein the matching circuit comprises: an L-shaped impedance matching circuit consisting of a first capacitor and a second inductor; the isolation circuit includes a second capacitor and a third inductor, wherein:
the first inductor multiplexes the first capacitor and the third inductor to form the first filter circuit; the inductance value of the third inductor is larger than that of the first inductor.
3. The amplifier circuit of claim 2, wherein the L-shaped impedance matching circuit and the third inductor form a second filter circuit, wherein:
the second filter circuit is used for outputting signals which are larger than a preset frequency threshold value in the signals output by the output end of the amplifying circuit; the preset frequency threshold is associated with the inductance value of the second inductor and the inductance value of the third inductor.
4. The amplifier circuit of claim 1 wherein the amplifier circuit comprises a plurality of transistors,
the matching network is a multi-stage matching network.
5. The amplifier circuit of claim 1, wherein the first inductor is an inductor with an adjustable inductance value.
6. The amplifier circuit of claim 1, wherein the first inductance comprises: an inductor formed by a metal wire on a substrate.
7. The amplifier circuit according to any one of claims 1 to 6, wherein the number of the matching circuits is at least two, and each matching circuit is connected in parallel, and the number of the first inductors is at least two;
each matching circuit is grounded through a first inductor connected in series with each matching circuit, and the isolation circuit is connected with each second inductor and is grounded through each first inductor.
8. The amplifier circuit of claim 7, wherein the amplifier circuit comprises a plurality of transistors,
the inductance value of each first inductor is different.
9. An amplifier, the amplifier comprising at least: an amplifier circuit as claimed in any one of claims 1 to 8.
10. An electronic device, the electronic device comprising at least: the amplifier of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211740664.2A CN115955200B (en) | 2022-12-31 | 2022-12-31 | Amplifier circuit, amplifier and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211740664.2A CN115955200B (en) | 2022-12-31 | 2022-12-31 | Amplifier circuit, amplifier and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115955200A CN115955200A (en) | 2023-04-11 |
| CN115955200B true CN115955200B (en) | 2024-04-05 |
Family
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| CN202211740664.2A Active CN115955200B (en) | 2022-12-31 | 2022-12-31 | Amplifier circuit, amplifier and electronic equipment |
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| CN101895265A (en) * | 2010-08-24 | 2010-11-24 | 复旦大学 | Full differential CMOS multimode low-noise amplifier |
| CN102420625A (en) * | 2011-11-23 | 2012-04-18 | 中兴通讯股份有限公司 | Matching circuit, matching circuit network and signal transmit-receive device |
| CN106026934A (en) * | 2016-05-19 | 2016-10-12 | 电子科技大学 | Doherty power amplifier with concurrent structure and design method thereof |
| CN109600119A (en) * | 2018-12-19 | 2019-04-09 | 成都瑞迪威科技有限公司 | A kind of millimetre-wave circuit structure and there is the circuit structure millimeter wave amplifier |
| CN110289819A (en) * | 2019-07-04 | 2019-09-27 | 广东工业大学 | An output matching network of a radio frequency front end and its radio frequency power amplifier |
| CN111355469A (en) * | 2020-03-16 | 2020-06-30 | 安徽安努奇科技有限公司 | A filter circuit and filter for generating extra transmission zero |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7253701B2 (en) * | 2004-11-30 | 2007-08-07 | Northrop Grumman Corporation | Multiplexed amplifier |
| CN112564645B (en) * | 2021-02-18 | 2021-05-28 | 广州慧智微电子有限公司 | Multi-frequency low-noise amplifier |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895265A (en) * | 2010-08-24 | 2010-11-24 | 复旦大学 | Full differential CMOS multimode low-noise amplifier |
| CN102420625A (en) * | 2011-11-23 | 2012-04-18 | 中兴通讯股份有限公司 | Matching circuit, matching circuit network and signal transmit-receive device |
| CN106026934A (en) * | 2016-05-19 | 2016-10-12 | 电子科技大学 | Doherty power amplifier with concurrent structure and design method thereof |
| CN109600119A (en) * | 2018-12-19 | 2019-04-09 | 成都瑞迪威科技有限公司 | A kind of millimetre-wave circuit structure and there is the circuit structure millimeter wave amplifier |
| CN110289819A (en) * | 2019-07-04 | 2019-09-27 | 广东工业大学 | An output matching network of a radio frequency front end and its radio frequency power amplifier |
| CN111355469A (en) * | 2020-03-16 | 2020-06-30 | 安徽安努奇科技有限公司 | A filter circuit and filter for generating extra transmission zero |
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| CN115955200A (en) | 2023-04-11 |
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