Current multiplexing low noise amplifier using noise feedback cancellation

Abstract

The application belongs to the technical field of integrated circuits, and discloses a current multiplexing type low-noise amplifier adopting noise feedback cancellation, which comprises an input matching circuit, a two-stage common-source current multiplexing amplifying circuit, a common-drain amplifying circuit, a common-gate amplifying circuit and a noise cancellation output circuit; the first input end of the two-stage common-source current multiplexing amplifying circuit is connected with the output end of the input matching circuit and the output end of the common-drain amplifying circuit; the first output end of the two-stage common-source current multiplexing amplifying circuit is connected with the input end of the common-gate amplifying circuit, and the output end of the common-gate amplifying circuit is connected with the second input end of the two-stage common-source current multiplexing amplifying circuit and the first input end of the noise cancellation output circuit; and the second output end of the two-stage common-source current multiplexing amplifying circuit is connected with the second input end of the noise cancellation output circuit. The application realizes current multiplexing and noise cancellation of the low-noise amplifier, and has the advantages of low noise coefficient, high gain and low power consumption.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of integrated circuits, and relates to a current multiplexing type low-noise amplifier adopting noise feedback cancellation. BACKGROUND

[0002] With the rapid development of high-speed wireless communication technology, Internet of Things sensing network and radar communication and the like, the portability, low power consumption, low cost and high performance of wireless mobile communication devices have become research hotspots. The application of high-integration radio frequency transceiver chips greatly improves the performance of wireless mobile communication devices.

[0003] As a first-stage active module of a radio frequency receiver, the circuit performance of a low-noise amplifier has a crucial influence on the signal-to-noise ratio and sensitivity of the entire receiver. An important index of a low-noise amplifier is low power consumption, which is mainly manifested in low current and low voltage. At present, low power consumption of a low-noise amplifier is mainly realized through current multiplexing technology, such as Figure 1 Fig. 1 shows a circuit principle diagram of an existing two-stage common-source current multiplexing structure type low-noise amplifier, which is realized based on a transistor M5 and a transistor M6. All DC currents of the transistor M6 are multiplexed by the transistor M5. Although this circuit can reduce the power consumption of the amplifier and increase the gain, the channel thermal noise of the transistor M5 in the circuit exists, so that the influence of the thermal noise of the device itself on the noise figure cannot be eliminated.

[0004] Therefore, it is necessary to study a low-noise amplifier capable of simultaneously realizing low noise figure and low power consumption. SUMMARY

[0005] The application aims to provide a current multiplexing type low-noise amplifier adopting noise feedback cancellation. By arranging an input matching circuit, a two-stage common-source current multiplexing amplification circuit, a common-drain amplification circuit, a common-gate amplification circuit and a noise cancellation output circuit, a two-stage common-source and common-gate parallel amplification output structure adopting common-drain feedback is formed, and the advantages of low noise figure, high gain and low power consumption are achieved.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0007] A current multiplexing type low-noise amplifier adopting noise feedback cancellation, comprising an input matching circuit, a two-stage common-source current multiplexing amplification circuit, a common-drain amplification circuit, a common-gate amplification circuit and a noise cancellation output circuit.

[0008] The first input end of the two-stage common-source current multiplexing amplifying circuit is connected with the output end of the input matching circuit and the output end of the common-drain amplifying circuit; the first output end of the two-stage common-source current multiplexing amplifying circuit is connected with the input end of the common-gate amplifying circuit, the output end of the common-gate amplifying circuit is connected with the second input end of the two-stage common-source current multiplexing amplifying circuit and the first input end of the noise cancellation output circuit; the second output end of the two-stage common-source current multiplexing amplifying circuit is connected with the second input end of the noise cancellation output circuit, the third output end of the two-stage common-source current multiplexing amplifying circuit is connected with the first input end of the common-drain amplifying circuit, and the fourth output end of the two-stage common-source current multiplexing amplifying circuit is connected with the second input end of the common-drain amplifying circuit;

[0009] The input end of the input matching circuit is connected with an external radio frequency signal, and the output end of the noise cancellation output circuit is the output end of the current multiplexing type low-noise amplifier using noise feedback cancellation.

[0010] As a limitation, the two-stage common-source current multiplexing amplifying circuit comprises a first transistor, a second transistor, a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a ninth inductor, a thirteenth inductor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a fourth capacitor and an eighth capacitor;

[0011] The fourth inductor, the fifth inductor and the ninth inductor constitute a three-coupling transformer circuit.

[0012] The gate of the second transistor and one end of the fourth capacitor are connected to serve as the first input end of the two-stage common-source current multiplexing amplification circuit and the output end of the input matching circuit, and the output end of the common-drain amplification circuit, the other end of the fourth capacitor is connected to one end of the ninth inductor, the other end of the ninth inductor serves as the first output end of the two-stage common-source current multiplexing amplification circuit and is connected to the input end of the common-gate amplification circuit; the source of the second transistor is connected to one end of the fourth inductor, the other end of the fourth inductor is connected to one end of the fifth inductor, one end of the fourth resistor and one end of the eighth capacitor, the other end of the eighth capacitor is grounded, the other end of the fifth inductor and the other end of the fourth resistor are connected to serve as the second input end of the two-stage common-source current multiplexing amplification circuit and are connected to the output end of the common-gate amplification circuit and the first input end of the noise cancellation output circuit; the drain of the second transistor is connected to one end of the third inductor and one end of the second capacitor, the other end of the third inductor is connected to the source of the first transistor and one end of the first capacitor, the other end of the first capacitor is grounded, the other end of the second capacitor is connected to the gate of the first transistor and one end of the thirteenth inductor to serve as the fourth output end of the two-stage common-source current multiplexing amplification circuit and the second input end of the common-drain amplification circuit; the drain of the first transistor is connected to one end of the second inductor and one end of the fifth resistor to serve as the second output end of the two-stage common-source current multiplexing amplification circuit and the second input end of the noise cancellation output circuit; the other end of the first inductor, the other end of the fifth resistor and the other end of the thirteenth inductor are connected to serve as the third output end of the two-stage common-source current multiplexing amplification circuit and the first input end of the common-drain amplification circuit, and the other end of the first inductor, the other end of the fifth resistor and the other end of the thirteenth inductor are all connected to the power supply end.

[0013] As a second limitation, the common-gate amplification circuit includes a third transistor, a seventh inductor, an eighth inductor and a third resistor;

[0014] The gate of the third transistor is connected to one end of the third resistor through the eighth inductor, and the other end of the third resistor is connected to the second bias voltage; the source of the third transistor is connected to one end of the seventh inductor to serve as the input end of the common-gate amplification circuit and the first output end of the two-stage common-source current multiplexing amplification circuit, and the other end of the seventh inductor is grounded; the drain of the third transistor serves as the output end of the common-gate amplification circuit and is connected to the second input end of the two-stage common-source current multiplexing amplification circuit and the first input end of the noise cancellation output circuit.

[0015] As a third limitation, the common-drain amplification circuit includes a fourth transistor, a first resistor, a third capacitor, a sixth inductor and a twelfth inductor;

[0016] The gate of the fourth transistor is connected with the second input end of the common-drain amplification circuit and the fourth output end of the two-stage common-source current multiplexing amplification circuit as a second input end; the drain of the fourth transistor is connected with one end of the first resistor through the sixth inductor, and the other end of the first resistor is connected with a power supply end and serves as the first input end of the common-drain amplification circuit and the third output end of the two-stage common-source current multiplexing amplification circuit; the source of the fourth transistor is connected with one end of the third capacitor C3 and one end of the twelfth inductor, and the other end of the twelfth inductor is connected with an alternating current ground, and the other end of the third capacitor serves as the output end of the common-drain amplification circuit and the first input end of the two-stage common-source current multiplexing amplification circuit.

[0017] As a fourth limitation, the input matching circuit comprises a second resistor, a tenth inductor, a fifth capacitor, a sixth capacitor and an LC parallel resonance circuit.

[0018] One end of the tenth inductor serves as the output end of the input matching circuit and is connected with the first input end of the two-stage common-source current multiplexing amplification circuit, and the other end of the tenth inductor is connected with one end of the second resistor and one end of the fifth capacitor, the other end of the second resistor is connected with the first bias voltage, the other end of the fifth capacitor is connected with one end of the parallel resonance circuit and one end of the sixth capacitor, the other end of the LC parallel resonance circuit is connected with the ground, and the other end of the sixth capacitor serves as the input end of the input matching circuit and is connected with an external radio frequency signal.

[0019] As a fifth limitation, the noise cancellation output circuit comprises a ninth capacitor and a tenth capacitor.

[0020] One end of the ninth capacitor is connected with the output end of the common-gate amplification circuit and the second input end of the two-stage common-source current multiplexing amplification circuit as the first input end of the noise cancellation output circuit, and the other end of the ninth capacitor is connected with one end of the tenth capacitor and serves as the second input end of the noise cancellation output circuit and is connected with the second output end of the two-stage common-source current multiplexing amplification circuit, and the other end of the tenth capacitor serves as the output end of the noise cancellation output circuit and is the output end of the current multiplexing type low-noise amplifier adopting noise feedback cancellation.

[0021] As a sixth limitation, the first transistor, the second transistor, the third transistor and the fourth transistor are all NMOS tubes.

[0022] Compared with the prior art, the technical progress achieved by the application lies in that:

[0023] (1) The application comprises an input matching circuit, a two-stage common-source current multiplexing amplification circuit, a common-drain amplification circuit, a common-gate amplification circuit and a noise cancellation output circuit, wherein the two-stage common-source current multiplexing structure in parallel with the common-gate is formed by the cooperation of the two-stage common-source current multiplexing amplification circuit and the common-gate amplification circuit, compared with the traditional two-stage common-source current multiplexing structure, the current of the input common-source is effectively multiplexed, the gain is improved while the circuit power consumption is saved, and the noise cancellation is created favorable conditions; the two-stage common-source and common-gate parallel amplification output noise cancellation structure using active common-drain feedback is formed by the cooperation of the two-stage common-source current multiplexing amplification circuit, the common-drain amplification circuit and the common-gate amplification circuit, compared with the passive device feedback mode, the circuit isolation can be improved; at the same time, combined with the two-stage common-source and common-gate parallel current multiplexing structure, the noise signal can be cancelled at the final output end.

[0024] (2) The application adopts a three-coupling transformer circuit composed of a fourth inductor, a fifth inductor and a ninth inductor in the two-stage common-source current multiplexing amplification circuit, not only saves the on-chip area, but also effectively improves the Vgs value between the gate and source of the second transistor, and achieves the effect of equivalent transconductance enhancement.

[0025] In summary, the application realizes the current multiplexing and noise cancellation of the low-noise amplifier, and has the advantages of low noise factor, high gain and low power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 shows the circuit principle diagram of the low-noise amplifier in the prior art;

[0027] Figure 2 Fig. 2 shows the circuit principle diagram of the low-noise amplifier in the embodiment of the application;

[0028] Figure 3 Fig. 3 shows the principle diagram of the current multiplexing of the low-noise amplifier in the embodiment of the application;

[0029] Figure 4 Fig. 4 shows the principle diagram of the noise cancellation of the low-noise amplifier in the embodiment of the application;

[0030] Figure 5 Fig. 5 shows the input matching simulation result diagram of the low-noise amplifier in the embodiment of the application;

[0031] Figure 6 Fig. 6 shows the output matching simulation result diagram of the low-noise amplifier in the embodiment of the application;

[0032] Figure 7 Fig. 7 shows the gain simulation result diagram of the low-noise amplifier in the embodiment of the application;

[0033] Figure 8The figure shown is a simulation result of the noise figure of the low-noise amplifier according to an embodiment of the present invention. Detailed Implementation

[0034] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example: A current-multiplexed low-noise amplifier employing noise feedback cancellation.

[0036] like Figure 2 As shown, this embodiment is a current-multiplexed low-noise amplifier with noise feedback cancellation, including an input matching circuit, a two-stage common-source current-multiplexed amplifier circuit, a common-drain amplifier circuit, a common-gate amplifier circuit, and a noise-cancelling output circuit.

[0037] The first input terminal of the two-stage common-source current-multiplexed amplifier circuit is connected to the output terminal of the input matching circuit and the output terminal of the common-drain amplifier circuit; the first output terminal of the two-stage common-source current-multiplexed amplifier circuit is connected to the input terminal of the common-gate amplifier circuit, and the output terminal of the common-gate amplifier circuit is connected to the second input terminal of the two-stage common-source current-multiplexed amplifier circuit and the first input terminal of the noise cancellation output circuit; the second output terminal of the two-stage common-source current-multiplexed amplifier circuit is connected to the second input terminal of the noise cancellation output circuit; the third output terminal of the two-stage common-source current-multiplexed amplifier circuit is connected to the first input terminal of the common-drain amplifier circuit; and the fourth output terminal of the two-stage common-source current-multiplexed amplifier circuit is connected to the second input terminal of the common-drain amplifier circuit. The input terminal Vin of the input matching circuit serves as the input terminal of the current-multiplexed low-noise amplifier with noise feedback cancellation and is connected to the external radio frequency signal. The output terminal Vout of the noise cancellation output circuit serves as the output terminal of the current-multiplexed low-noise amplifier with noise feedback cancellation.

[0038] In this embodiment, the two-stage common-source current multiplexing amplifier circuit includes a first transistor M1, a second transistor M2, a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a fifth inductor L5, a ninth inductor L9, a thirteenth inductor L13, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a fourth capacitor C4, and an eighth capacitor C8.

[0039] The gate of the second transistor M2 and one end of the fourth capacitor C4 are connected to serve as the first input end of the two-stage common-source current multiplexing amplification circuit and are connected with the output end of the input matching circuit and the output end of the common-drain amplification circuit, the other end of the fourth capacitor C4 is connected with one end of the ninth inductor L9, and the other end of the ninth inductor L9 serves as the first output end of the two-stage common-source current multiplexing amplification circuit and is connected with the input end of the common-gate amplification circuit; the source of the second transistor M2 is connected with one end of the fourth inductor L4, the other end of the fourth inductor L4 is connected with one end of the fifth inductor L5, one end of the fourth resistor R4 and one end of the eighth capacitor C8, the other end of the eighth capacitor C8 is grounded, and the other end of the fifth inductor L5 and the other end of the fourth resistor R4 are connected to serve as the second input end of the two-stage common-source current multiplexing amplification circuit and are connected with the output end of the common-gate amplification circuit and the first input end of the noise cancellation output circuit; the drain of the second transistor M2 is connected with one end of the third inductor L3 and one end of the second capacitor C2, the other end of the third inductor L3 is connected with the source of the first transistor M1 and one end of the first capacitor C1, the other end of the first capacitor C1 is grounded, and the other end of the second capacitor C2 is connected with the gate of the first transistor M1 and one end of the thirteenth inductor L13 to serve as the fourth output end of the two-stage common-source current multiplexing amplification circuit and is connected with the second input end of the common-drain amplification circuit; the drain of the first transistor M1 is connected with one end of the second inductor L2, the other end of the second inductor L2 is connected with one end of the first inductor L1 and one end of the fifth resistor R5 to serve as the second output end of the two-stage common-source current multiplexing amplification circuit and is connected with the second input end of the noise cancellation output circuit; the other end of the first inductor L1, the other end of the fifth resistor R5 and the other end of the thirteenth inductor L13 are connected to serve as the third output end of the two-stage common-source current multiplexing amplification circuit and are connected with the first input end of the common-drain amplification circuit, and the other end of the first inductor L1, the other end of the fifth resistor R5 and the other end of the thirteenth inductor L13 are all connected with the power supply end VDD.

[0040] In the embodiment, the fourth inductor L4, the fifth inductor L5 and the ninth inductor L9 constitute a three-coupled transformer circuit. The three-coupled transformer circuit is used for input matching, load and source degeneration in the two-stage common-source and common-gate parallel current multiplexing structure state; wherein the fourth inductor L4 is used for source degeneration and adjusts the real part of the input matching of the two-stage common-source current multiplexing amplification circuit; the fifth inductor L5 serves as a load and provides high gain for the common-gate amplification circuit; and the ninth inductor L9 is used for input matching and adjusts the imaginary part of the input matching of the overall circuit. The three-coupled transformer circuit not only saves the on-chip area, but also effectively improves the Vgs value between the gate and the source of the second transistor, achieves the effect of equivalent transconductance enhancement, and assists signal and noise transmission.

[0041] The common-gate amplification circuit comprises a third transistor M3, a seventh inductor L7, an eighth inductor L8 and a third resistor R3; the gate of the third transistor M3 is connected with one end of the third resistor R3 through the eighth inductor L8, and the other end of the third resistor R3 is connected with a second bias voltage Vb2; the source of the third transistor M3 is connected with one end of the seventh inductor L7, and then serves as an input end of the common-gate amplification circuit and is connected with a first output end of the two-stage common-source current multiplexing amplification circuit, and the other end of the seventh inductor L7 is grounded; the drain of the third transistor M3 serves as an output end of the common-gate amplification circuit and is connected with a second input end of the two-stage common-source current multiplexing amplification circuit and a first input end of the noise cancellation output circuit.

[0042] The common-drain amplification circuit comprises a fourth transistor M4, a first resistor R1, a third capacitor C3, a sixth inductor L6 and a twelfth inductor L12; the gate of the fourth transistor M4 serves as a second input end of the common-drain amplification circuit and is connected with a fourth output end of the two-stage common-source current multiplexing amplification circuit; the drain of the fourth transistor M4 is connected with one end of the first resistor R1 through the sixth inductor L6, the other end of the first resistor R1 is connected with a power supply end VDD and serves as a first input end of the common-drain amplification circuit and is connected with a third output end of the two-stage common-source current multiplexing amplification circuit; the source of the fourth transistor M4 is connected with one end of the third capacitor C3 and one end of the twelfth inductor L12, the other end of the twelfth inductor L12 is grounded, and the other end of the third capacitor C3 serves as an output end of the common-drain amplification circuit and is connected with a first input end of the two-stage common-source current multiplexing amplification circuit.

[0043] The input matching circuit comprises a second resistor R2, a tenth inductor L10, a fifth capacitor C5, a sixth capacitor C6 and an LC parallel resonance circuit; the LC parallel resonance circuit is obtained by connecting the fifth capacitor C7 and an eleventh inductor L11 in parallel; one end of the tenth inductor L10 serves as an output end of the input matching circuit and is connected with a first input end of the two-stage common-source current multiplexing amplification circuit, the other end of the tenth inductor L10 is connected with one end of the second resistor R2 and one end of the fifth capacitor C5, the other end of the second resistor R2 is connected with a first bias voltage Vb1, the other end of the fifth capacitor C5 is connected with one end of the LC parallel resonance circuit and one end of the sixth capacitor C6, the other end of the LC parallel resonance circuit is grounded, and the other end of the sixth capacitor C6 serves as an input end Vin of the input matching circuit and is connected with an external radio frequency signal.

[0044] The noise cancellation output circuit comprises a ninth capacitor C9 and a tenth capacitor C10; one end of the ninth capacitor C9 is connected with the output end of the common-gate amplification circuit and the second input end of the two-stage common-source current multiplexing amplification circuit as the first input end of the noise cancellation output circuit, the other end of the ninth capacitor C9 is connected with one end of the tenth capacitor C10, and then the other end of the tenth capacitor C10 is connected with the second output end of the two-stage common-source current multiplexing amplification circuit as the second input end of the noise cancellation output circuit, and the other end of the tenth capacitor C10 is the output end Vout of the noise cancellation output circuit.

[0045] In the embodiment, the first transistor M1, the second transistor M2, the third transistor M3 and the fourth transistor M4 are NMOS tubes.

[0046] In use, the current multiplexing low-noise amplifier with noise feedback cancellation in the embodiment is connected with a power supply voltage at the power supply end VDD, connected with a bias voltage at the first bias voltage Vb1 and the second bias voltage Vb2, and connected with a radio frequency signal at the input end Vin of the input matching circuit, so that the amplified radio frequency signal is output at the output end Vout of the noise cancellation output circuit.

[0047] The current multiplexing and noise cancellation principle of the current multiplexing low-noise amplifier with noise feedback cancellation in the embodiment is as follows:

[0048] I. Current multiplexing

[0049] As shown in Figure 3 , the current multiplexing in the embodiment refers to the current flowing through the first transistor M1 and the fourth transistor M4, and the direct current flowing through the first transistor M1 and the fourth transistor M4 is used by the second transistor M2 and the third transistor M3 after the radio frequency signal is isolated.

[0050] Specifically, the current flows from the power supply end VDD into the first transistor M1 and the fourth transistor M4 first, the current flowing through the fourth transistor M4 is combined with the current flowing through the first transistor M1 at RFGND through the twelfth inductor L12, and the combined current (i.e., the multiplexed current) flows through the third inductor L3, the second transistor M2, the fourth inductor L4, the fifth inductor L5, the third transistor M3, the seventh inductor L7 to the ground in turn, as shown by the direct current path indicated by the solid line in Figure 3 .

[0051] For an alternating current signal, as shown in Figure 3As shown by the dotted line in the middle, the AC signal is amplified at the second transistor M2. The amplified signal is blocked by the third inductor L3. The signal flows through the second capacitor C2. Part of it is amplified again by the first transistor M1, and the other part is fed back to the gate of the second transistor M2 by the fourth transistor M4. There is still a part of the signal at the gate of the second transistor M2. After being amplified by the third transistor M3, it is output to the output terminal Vout.

[0052] In this circuit, the first transistor M1 and the second transistor M2 are common-source transistors, the third transistor M3 is a common-gate transistor, and the fourth transistor M4 is a common-drain transistor.

[0053] II. Noise Cancellation

[0054] like Figure 4 As shown, in this embodiment, the main function is to cancel the channel thermal noise Vnoise of the second transistor M2, such as... Figure 4 As shown by the sawtooth curve, after the channel thermal noise Vnoise is generated, it flows through the second capacitor C2 to the gate of the fourth transistor M4 and the gate of the first transistor M1. The fourth transistor M4 feeds back a portion of the channel thermal noise Vnoise in phase to the gate of the second transistor M2, while the first transistor M1 outputs a portion of the channel thermal noise Vnoise in phase to the non-output terminal of the tenth capacitor C10. The channel thermal noise Vnoise at the gate of the second transistor M2 flows through the fourth capacitor C4 and the ninth inductor L9, and is amplified in phase at the third transistor M3, outputting the channel thermal noise Vnoise to the non-output terminal of the tenth capacitor C10. At the non-output terminal of the tenth capacitor C10, the Vnoise signal and the Vnoise signal are superimposed and cancel each other out, completing noise cancellation.

[0055] For the signal path, the radio frequency (RF) signal is input from the input terminal Vin. After being amplified by the second transistor M2, it is inverted. This inverted signal is then inverted and amplified again by the first transistor M1, forming a signal amplified in phase with the input terminal Vin. A portion of the signal at the gate of the second transistor M2 is amplified in phase by the third transistor M3 and output. Finally, at the non-output terminal of the tenth capacitor C10, the input RF signal is output after being superimposed in phase, as shown below. Figure 4 As shown in the arc-shaped curve, the noise signals cancel each other out, forming a signal superposition, which is the effect of noise cancellation.

[0056] like Figures 5-8As shown in the simulation result diagram of the current multiplexing type low noise amplifier using noise feedback cancellation in the embodiment, the low noise amplifier in the embodiment can have a noise coefficient lower than 2 dB in a wide band range and a gain peak higher than 15 dB in a wide frequency band range, and has the characteristics of high gain and low noise. Meanwhile, since the three-stage current multiplexing structure is connected in series from top to bottom, the low noise amplifier also has the characteristic of low power consumption.

[0057] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A current reuse type low noise amplifier using noise feedback cancellation, characterized by, The input matching circuit, the two-stage common-source current multiplexing amplification circuit, the common-drain amplification circuit, the common-gate amplification circuit and the noise cancellation output circuit are connected in series. The first input end of the two-stage common-source current multiplexing amplification circuit is connected with the output end of the input matching circuit and the output end of the common-drain amplification circuit; the first output end of the two-stage common-source current multiplexing amplification circuit is connected with the input end of the common-gate amplification circuit; the output end of the common-gate amplification circuit is connected with the second input end of the two-stage common-source current multiplexing amplification circuit and the first input end of the noise cancellation output circuit; the second output end of the two-stage common-source current multiplexing amplification circuit is connected with the second input end of the noise cancellation output circuit; the third output end of the two-stage common-source current multiplexing amplification circuit is connected with the first input end of the common-drain amplification circuit; and the fourth output end of the two-stage common-source current multiplexing amplification circuit is connected with the second input end of the common-drain amplification circuit. The input end of the input matching circuit is connected with an external radio frequency signal, and the output end of the noise cancellation output circuit is the output end of the current multiplexing type low-noise amplifier adopting noise feedback cancellation. The two-stage common-source current multiplexing amplification circuit comprises a first transistor, a second transistor, a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a ninth inductor, a thirteenth inductor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a fourth capacitor and an eighth capacitor. The fourth inductor, the fifth inductor and the ninth inductor constitute a three-coupling transformer circuit. The gate of the second transistor and one end of the fourth capacitor are connected to serve as the first input end of the two-stage common-source current multiplexing amplifying circuit, the output end of the input matching circuit and the output end of the common-drain amplifying circuit, the other end of the fourth capacitor is connected with one end of the ninth inductor, and the other end of the ninth inductor is connected with the first output end of the two-stage common-source current multiplexing amplifying circuit and the input end of the common-gate amplifying circuit; the source of the second transistor is connected with one end of the fourth inductor, the other end of the fourth inductor is connected with one end of the fifth inductor, one end of the fourth resistor and one end of the eighth capacitor, the other end of the eighth capacitor is grounded, and the other end of the fifth inductor and the other end of the fourth resistor are connected to serve as the second input end of the two-stage common-source current multiplexing amplifying circuit, the output end of the common-gate amplifying circuit and the first input end of the noise cancellation output circuit; the drain of the second transistor is connected with one end of the third inductor and one end of the second capacitor, the other end of the third inductor is connected with the source of the first transistor and one end of the first capacitor, the other end of the first capacitor is grounded, and the other end of the second capacitor is connected with the gate of the first transistor and one end of the thirteenth inductor to serve as the fourth output end of the two-stage common-source current multiplexing amplifying circuit and the second input end of the common-drain amplifying circuit; the drain of the first transistor is connected with one end of the second inductor and one end of the fifth resistor to serve as the second output end of the two-stage common-source current multiplexing amplifying circuit and the second input end of the noise cancellation output circuit; the other end of the first inductor, the other end of the fifth resistor and the other end of the thirteenth inductor are connected to serve as the third output end of the two-stage common-source current multiplexing amplifying circuit and the first input end of the common-drain amplifying circuit, and the other end of the first inductor, the other end of the fifth resistor and the other end of the thirteenth inductor are all connected with the power supply end.

2. The current reused low noise amplifier with noise feedback cancellation according to claim 1, wherein, The common-gate amplifying circuit comprises a third transistor, a seventh inductor, an eighth inductor and a third resistor; The gate of the third transistor is connected with one end of the third resistor through the eighth inductor, and the other end of the third resistor is connected with the second bias voltage; the source of the third transistor is connected with one end of the seventh inductor to serve as the input end of the common-gate amplifying circuit and the first output end of the two-stage common-source current multiplexing amplifying circuit, and the other end of the seventh inductor is grounded; the drain of the third transistor serves as the output end of the common-gate amplifying circuit and is connected with the second input end of the two-stage common-source current multiplexing amplifying circuit and the first input end of the noise cancellation output circuit.

3. The current reused low noise amplifier with noise feedback cancellation according to claim 2, wherein, The common-drain amplifying circuit comprises a fourth transistor, a first resistor, a third capacitor, a sixth inductor and a twelfth inductor; The gate of the fourth transistor is connected with the second input end of the common-drain amplification circuit and the fourth output end of the two-stage common-source current multiplexing amplification circuit as a second input end; the drain of the fourth transistor is connected with one end of the first resistor through the sixth inductor, the other end of the first resistor is connected with the power supply end and serves as the first input end of the common-drain amplification circuit and the third output end of the two-stage common-source current multiplexing amplification circuit; the source of the fourth transistor is connected with one end of the third capacitor C3 and one end of the twelfth inductor, the other end of the twelfth inductor is connected with the alternating current ground, and the other end of the third capacitor serves as the output end of the common-drain amplification circuit and the first input end of the two-stage common-source current multiplexing amplification circuit.

4. The current reused low noise amplifier with noise feedback cancellation according to claim 1, wherein, The input matching circuit comprises a second resistor, a tenth inductor, a fifth capacitor, a sixth capacitor and an LC parallel resonant circuit; One end of the tenth inductor serves as the output end of the input matching circuit and is connected with the first input end of the two-stage common-source current multiplexing amplification circuit, the other end of the tenth inductor is connected with one end of the second resistor and one end of the fifth capacitor, the other end of the second resistor is connected with the first bias voltage, one end of the fifth capacitor is connected with one end of the parallel resonant circuit and one end of the sixth capacitor, the other end of the LC parallel resonant circuit is connected with the ground, and the other end of the sixth capacitor serves as the input end of the input matching circuit and is connected with the external radio frequency signal.

5. The current reused low noise amplifier with noise feedback cancellation according to claim 1, wherein, The noise cancellation output circuit comprises a ninth capacitor and a tenth capacitor; One end of the ninth capacitor serves as the first input end of the noise cancellation output circuit and is connected with the output end of the common-gate amplification circuit and the second input end of the two-stage common-source current multiplexing amplification circuit, the other end of the ninth capacitor is connected with one end of the tenth capacitor and serves as the second input end of the noise cancellation output circuit and is connected with the second output end of the two-stage common-source current multiplexing amplification circuit, and the other end of the tenth capacitor serves as the output end of the noise cancellation output circuit and is the output end of the current multiplexing type low-noise amplifier adopting noise feedback cancellation.

6. The current reused low noise amplifier with noise feedback cancellation according to claim 3, wherein, The first transistor, the second transistor, the third transistor and the fourth transistor are all NMOS tubes.

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