Amplifier circuit with adjustable power consumption

Abstract

The invention relates to the technical field of microelectronics, semiconductors and communication technologies, and discloses a power-consumption-adjustable amplifier circuit, which comprises an amplifying circuit, a power-consumption-adjustable amplifier circuit, a power-consumption-adjustable amplifier circuit, a power-consumption-adjustable amplifier circuit, a power-consumption-adjustable amplifier circuit and a power-consumption-adjustable amplifier circuit, the biasing circuit is used for returning a part of the amplified signal to the input end of the amplifying circuit, and the biasing circuit is externally connected with an adjustable resistor; and the adjustable resistor is used for controlling the power consumption of the adjustable power consumption amplifier circuit. The bias circuit is externally connected with the adjustable resistor, the power consumption can be adjusted by adopting a proper resistance value, and compared with the mode that the power consumption of the amplifier is adjusted by reducing the power supply voltage or externally introducing an extra bias circuit, the circuit cost can be further reduced, and the reliability, stability and flexibility of the whole circuit are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of microelectronics, semiconductors and communication technology, and in particular to an adjustable power consumption amplifier circuit. Background Art

[0002] In recent years, in order to make wireless communication systems highly integrated and miniaturized, it is necessary to adjust the power consumption of the amplifier (increase or decrease it), which can further reduce the circuit cost and improve the reliability, stability and flexibility of the overall circuit.

[0003] However, current amplifier designs mainly use methods such as reducing the power supply voltage or introducing an additional bias circuit to adjust the amplifier power consumption, which makes the circuit more complex in application and more costly. Summary of the invention

[0004] Based on this, it is necessary to address the technical problem that the power consumption adjustment effect of the amplifier in the prior art is poor, and propose an adjustable power consumption amplifier circuit, the circuit comprising:

[0005] An amplifier circuit, used for amplifying the radio frequency signal and outputting an amplified signal;

[0006] A bias circuit, used for returning a portion of the amplified signal to the input end of the amplifying circuit, wherein the bias circuit is externally connected to an adjustable resistor;

[0007] The adjustable resistor is used to control the power consumption of the adjustable power consumption amplifier circuit.

[0008] In one embodiment, the bias circuit includes a transistor M1, a resistor R1, a resistor R2, a resistor R3, and an adjustable resistor R4;

[0009] One end of the resistor R1 is connected to the drain of the transistor M1, the other end of the resistor R1 is connected to the output end of the amplifier circuit, the gate of the transistor M1 is connected to one end of the resistor R2 and the drain of the transistor M1, the other end of the resistor R2 is connected to the input end of the amplifier circuit, the source of the transistor M1 is connected to one end of the resistor R3, the other end of the resistor R3 is grounded, the source of the transistor M1 is connected to one end of the adjustable resistor R4 through a binding wire, and the other end of the adjustable resistor R4 is grounded.

[0010] In one embodiment, the amplifier circuit includes a transistor M2, a resistor R5, and a capacitor C3, wherein one end of the resistor R5 and one end of the capacitor C3 are connected to the source of the transistor M2, the other end of the resistor R5 and the other end of the capacitor C3 are grounded, the gate of the transistor M2 is the input end of the amplifier circuit, and the drain of the transistor M2 is the output end of the amplifier circuit.

[0011] In one embodiment, the adjustable power consumption amplifier circuit further includes an inductor L1, a capacitor C1 and a capacitor C2, wherein the other end of the resistor R1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to a power supply VDD, the drain of the transistor M2 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to a radio frequency signal output end, one end of the capacitor C1 is connected to a radio frequency signal input end, and the other end of the capacitor C1 is connected to a gate of the transistor M2.

[0012] The adjustable power consumption amplifier circuit proposed in the present invention includes an amplifier circuit for amplifying a radio frequency signal and outputting an amplified signal; a bias circuit for returning a portion of the amplified signal to the input end of the amplifier circuit, wherein the bias circuit is externally connected to an adjustable resistor; and the adjustable resistor is used to control the power consumption of the adjustable power consumption amplifier circuit. The present invention can adjust the power consumption by connecting an adjustable resistor to the bias circuit and taking a suitable resistance value. Compared with reducing the power supply voltage or introducing an additional bias circuit externally to adjust the amplifier power consumption, this can further reduce the circuit cost and improve the reliability, stability and flexibility of the overall circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] in:

[0015] Figure 1 is a schematic diagram of a circuit structure of an adjustable power consumption amplifier circuit in one embodiment;

[0016] Figure 2 A gain curve of an adjustable power consumption amplifier circuit as the frequency changes in one embodiment;

[0017] Figure 3 is a curve of the output third-order intermodulation point of an adjustable power consumption amplifier circuit as the frequency changes in one embodiment;

[0018] Figure 4 FIG. 4 is a noise figure curve of an adjustable power consumption amplifier circuit as the frequency changes in one embodiment. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 As shown, Figure 1 A structural schematic diagram of an adjustable power consumption amplifier circuit provided for one embodiment of the present invention, the adjustable power consumption amplifier circuit comprises: an amplifier circuit, used to amplify a radio frequency signal and output an amplified signal; a bias circuit, used to return a portion of the amplified signal to the input end of the amplifier circuit, wherein the bias circuit is externally connected to an adjustable resistor; the adjustable resistor is used to control the power consumption of the adjustable power consumption amplifier circuit.

[0023] Compared with general amplifiers, the adjustable power consumption amplifier circuit proposed in the present invention has the effect of adjustable power consumption, and specifically has the characteristics of two different modes of high / low power consumption. When working at high power consumption, the device of the external adjustable resistor R4 of the bias circuit does not exist; when working at low power consumption, the external adjustable resistor R4 of the bias circuit can achieve low power consumption amplification by taking a suitable resistance value. Compared with reducing the power supply voltage or introducing an additional bias circuit externally to adjust the power consumption of the amplifier, this can further reduce the circuit cost and improve the reliability, stability and flexibility of the overall circuit.

[0024] refer to Figure 2 , Figure 2The gain variation curve of the adjustable power amplifier circuit in high and low power modes with frequency is shown. The results in this figure show that the bias structure of this circuit can make the amplifier have an increased flat gain within the band, and the values ​​of C4 and R6 in the bias circuit can solve the problem of the amplifier gain dropping sharply as the frequency increases.

[0025] refer to Figure 3 , Figure 3 This is the noise coefficient curve of the adjustable power amplifier circuit in high and low power modes as it changes with frequency. The results in this figure show that the bias structure of this circuit can make the amplifier have lower noise within the band, and the value of bias circuit R7 can significantly improve the noise level.

[0026] refer to Figure 4 , Figure 4 The simulation results of static current of adjustable power amplifier circuit under high or low power consumption show that the use of this bias circuit can make the amplifier have the above indicators while maintaining very low power consumption. If other biases are used, the low power consumption indicators may also be achieved, but the indicators of other amplifiers are far from those of this bias circuit.

[0027] In one embodiment, reference Figure 1 , the bias circuit includes a transistor M1, a resistor R1, a resistor R2, a resistor R3, and an adjustable resistor R4;

[0028] One end of the resistor R1 is connected to the drain of the transistor M1, the other end of the resistor R1 is connected to the output end of the amplifier circuit, the gate of the transistor M1 is connected to one end of the resistor R2 and the drain of the transistor M1, the other end of the resistor R2 is connected to the input end of the amplifier circuit, the source of the transistor M1 is connected to one end of the resistor R3, the other end of the resistor R3 is grounded, the source of the transistor M1 is connected to one end of the adjustable resistor R4 through a binding wire, and the other end of the adjustable resistor R4 is grounded.

[0029] In one embodiment, reference Figure 1 The amplifier circuit includes a transistor M2, a resistor R5, and a capacitor C3, wherein one end of the resistor R5 and one end of the capacitor C3 are connected to the source of the transistor M2, the other end of the resistor R5 and the other end of the capacitor C3 are grounded, the gate of the transistor M2 is the input end of the amplifier circuit, and the drain of the transistor M2 is the output end of the amplifier circuit.

[0030] In one embodiment, reference Figure 1The adjustable power consumption amplifier circuit also includes an inductor L1, a capacitor C1 and a capacitor C2, wherein the other end of the resistor R1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the power supply VDD, the drain of the transistor M2 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to the RF signal output end, one end of the capacitor C1 is connected to the RF signal input end, and the other end of the capacitor C1 is connected to the gate of the transistor M2.

[0031] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An adjustable power consumption amplifier circuit, characterized in that: The adjustable power consumption amplifier circuit comprises: An amplifier circuit, used for amplifying the radio frequency signal and outputting an amplified signal; A bias circuit, used for returning a portion of the amplified signal to the input end of the amplifying circuit, wherein the bias circuit is externally connected to an adjustable resistor; The adjustable resistor is used to control the power consumption of the adjustable power consumption amplifier circuit.

2. The adjustable power consumption amplifier circuit according to claim 1, characterized in that: The bias circuit includes a transistor M1, a resistor R1, a resistor R2, a resistor R3, and an adjustable resistor R4; One end of the resistor R1 is connected to the drain of the transistor M1, the other end of the resistor R1 is connected to the output end of the amplifier circuit, the gate of the transistor M1 is connected to one end of the resistor R2 and the drain of the transistor M1, the other end of the resistor R2 is connected to the input end of the amplifier circuit, the source of the transistor M1 is connected to one end of the resistor R3, the other end of the resistor R3 is grounded, the source of the transistor M1 is connected to one end of the adjustable resistor R4 through a binding wire, and the other end of the adjustable resistor R4 is grounded.

3. The adjustable power consumption amplifier circuit according to claim 2, characterized in that: The amplifier circuit includes a transistor M2, a resistor R5, and a capacitor C3, wherein one end of the resistor R5 and one end of the capacitor C3 are connected to the source of the transistor M2, the other end of the resistor R5 and the other end of the capacitor C3 are grounded, the gate of the transistor M2 is the input end of the amplifier circuit, and the drain of the transistor M2 is the output end of the amplifier circuit.

4. The adjustable power consumption amplifier circuit according to claim 3, characterized in that: The adjustable power consumption amplifier circuit also includes an inductor L1, a capacitor C1 and a capacitor C2, wherein the other end of the resistor R1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to a power supply VDD, the drain of the transistor M2 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to a radio frequency signal output end, one end of the capacitor C1 is connected to a radio frequency signal input end, and the other end of the capacitor C1 is connected to a gate of the transistor M2.

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