Low-noise amplifier and radio-frequency power amplifier module
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-01-30
- Publication Date
- 2026-08-13
Smart Images
Figure CN2026076032_13082026_PF_FP_ABST
Abstract
Description
Low-noise amplifier and RF power amplifier module Technical Field
[0001] This utility model relates to the field of wireless communication technology, and in particular to a low-noise amplifier and a radio frequency power amplifier module. Background Technology
[0002] With the rapid development of wireless communication technology, mobile phones, tablets and other electronic devices with wireless communication capabilities have become necessities in people's lives. As a key component of electronic devices, the performance of the low-noise amplifier in the receiver directly affects the user experience of the electronic devices.
[0003] The low-noise amplifier in the prior art mainly includes an input matching network, two power amplifiers, an output matching circuit, and other auxiliary devices and switches. The two power amplifiers can be in amplification mode or bypass mode by selectively grounding, connecting to bias circuits, and using different operating voltages. When the low-noise amplifier is in amplification mode, it is used to amplify the received radio frequency signal before transmitting it to the output matching circuit. When the low-noise amplifier is in bypass mode, it is used to transmit the received radio frequency signal from the bypass to the output matching circuit, that is, the radio frequency signal is transmitted to the output matching circuit without power amplification.
[0004] Although the aforementioned low-noise amplifier can achieve the selection of amplification mode and bypass mode, the bypass mode circuit of the low-noise amplifier requires more components connected in series or parallel, which makes the wiring of the low-noise amplifier complicated. In addition, the equivalent capacitance to ground of all components on the bypass mode node is large, which will also affect the performance of the low-noise amplifier.
[0005] Utility Model Content
[0006] To address the shortcomings of the existing technology, this utility model proposes a low-noise amplifier and RF power amplifier module to solve the problems that the bypass mode circuit of the low-noise amplifier in the existing technology requires a large number of components connected in series or parallel, which leads to complicated wiring of the low-noise amplifier. At the same time, the equivalent capacitance to ground of all components on the bypass mode node is large, which will also affect the performance of the low-noise amplifier.
[0007] To solve the above-mentioned technical problems, in a first aspect, the present invention provides a low-noise amplifier, which includes an input matching circuit, a first capacitor, a first power amplifier, a first resistor, a first single-pole single-throw switch, a second capacitor, a first inductor, a second single-pole single-throw switch, a second resistor, a second power amplifier, a third capacitor, a third single-pole single-throw switch, a third resistor, a second inductor, a fourth capacitor, and an output matching circuit.
[0008] The input terminal of the input matching circuit is used to receive radio frequency signals;
[0009] The first terminal of the first capacitor is connected to the output terminal of the input matching circuit;
[0010] The input terminal of the first power amplifier is connected to the second terminal of the first capacitor;
[0011] The first end of the first resistor is connected to the input terminal of the first power amplifier, and the second end of the first resistor is used to select grounding or to connect to the first bias voltage.
[0012] The control terminal of the first single-pole single-throw switch is connected to the output terminal of the input matching circuit;
[0013] The first end of the second capacitor is connected to the output end of the first single-pole single-throw switch, and the second end of the second capacitor is connected to the output end of the first power amplifier.
[0014] The first end of the first inductor is connected to the ground terminal of the first power amplifier;
[0015] The control terminal of the second single-pole single-throw switch is connected to the second terminal of the first inductor, and the output terminal of the second single-pole single-throw switch is grounded.
[0016] The first end of the second resistor is connected to the second end of the first inductor, and the second end of the second resistor is grounded.
[0017] The ground terminal of the second power amplifier is connected to the output terminal of the first power amplifier;
[0018] The first terminal of the third capacitor is connected to the input terminal of the second power amplifier;
[0019] The control terminal of the third single-pole single-throw switch is connected to the second terminal of the third capacitor, and the output terminal of the third single-pole single-throw switch is grounded.
[0020] The first end of the third resistor is connected to the input terminal of the second power amplifier, and the second end of the third resistor is used to select the operating voltage or the second bias voltage.
[0021] The first end of the second inductor is connected to the output terminal of the second power amplifier;
[0022] The first terminal of the fourth capacitor is connected to the second terminal of the second inductor and is used to select the operating voltage or ground. The second terminal of the fourth capacitor is grounded.
[0023] The input terminal of the output matching circuit is connected to the output terminal of the second power amplifier, and the output terminal of the output matching circuit is used to output radio frequency signals.
[0024] Preferably, the low-noise amplifier further includes a first single-pole double-throw switch; the common terminal of the first single-pole double-throw switch is connected to the second terminal of the first resistor, the first connection terminal of the first single-pole double-throw switch is used for grounding, and the second connection terminal of the first single-pole double-throw switch is used to connect to a first bias signal.
[0025] Preferably, the low-noise amplifier further includes a second single-pole double-throw switch; the common terminal of the second single-pole double-throw switch is connected to the second terminal of the third resistor, the first connection terminal of the second single-pole double-throw switch is used to connect to the operating voltage, and the second connection terminal of the second single-pole double-throw switch is used to connect to the second bias signal.
[0026] Preferably, the low-noise amplifier further includes a fourth single-pole single-throw switch and a fifth single-pole single-throw switch;
[0027] The control terminal of the fourth single-pole single-throw switch is connected to the first terminal of the fourth capacitor, and the output terminal of the fourth single-pole single-throw switch is used to connect to the working voltage.
[0028] The control terminal of the fifth single-pole single-throw switch is connected to the first terminal of the fourth capacitor, and the output terminal of the fifth single-pole single-throw switch is used for grounding.
[0029] Preferably, the low-noise amplifier further includes a sixth single-pole single-throw switch and a seventh single-pole single-throw switch;
[0030] The control terminal of the sixth single-pole single-throw switch is connected to the second terminal of the first resistor, and the output terminal of the sixth single-pole single-throw switch is used for grounding.
[0031] The control terminal of the seventh single-pole single-throw switch is connected to the second terminal of the first resistor, and the output terminal of the seventh single-pole single-throw switch is used to connect to the first bias voltage.
[0032] Preferably, the low-noise amplifier further includes an eighth single-pole single-throw switch and a ninth single-pole single-throw switch;
[0033] The control terminal of the eighth single-pole single-throw switch is connected to the second terminal of the third resistor, and the output terminal of the eighth single-pole single-throw switch is used to connect to the working voltage.
[0034] The control terminal of the ninth single-pole single-throw switch is connected to the second terminal of the third resistor, and the output terminal of the ninth single-pole single-throw switch is used to connect to the second bias voltage.
[0035] Preferably, the low-noise amplifier further includes a third single-pole double-throw switch; the common terminal of the third single-pole double-throw switch is connected to the first terminal of the fourth capacitor, the first connection terminal of the third single-pole double-throw switch is used to connect to the operating voltage, and the second connection terminal of the second single-pole double-throw switch is used to ground.
[0036] Preferably, the first power amplifier includes a first field-effect transistor; the gate of the first field-effect transistor serves as the input terminal of the first power amplifier, the drain of the first field-effect transistor serves as the output terminal of the first power amplifier, and the source of the first field-effect transistor serves as the ground terminal of the first power amplifier.
[0037] Preferably, the second power amplifier includes a second field-effect transistor; the gate of the second field-effect transistor serves as the input terminal of the second power amplifier, the drain of the second field-effect transistor serves as the output terminal of the second power amplifier, and the source of the second field-effect transistor serves as the ground terminal of the second power amplifier.
[0038] Secondly, this utility model provides an RF power amplifier module, which includes the low-noise amplifier described above.
[0039] Compared with existing technologies, the low-noise amplifier in this invention reduces the number of components required for the bypass mode circuit by designing an input matching circuit, a first capacitor, a first power amplifier, a first resistor, a first single-pole single-throw switch, a second capacitor, a first inductor, a second single-pole single-throw switch, a second resistor, a second power amplifier, a third capacitor, a third single-pole single-throw switch, a third resistor, a second inductor, a fourth capacitor, and an output matching circuit, and by defining the connection method of each component. This facilitates the routing of the low-noise amplifier and improves its wiring flexibility. At the same time, the output matching circuit can absorb the equivalent capacitance to ground of all components on the bypass mode node, thereby reducing the impact on the performance of the low-noise amplifier. Attached Figure Description
[0040] The present invention will now be described in detail with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description in conjunction with the following drawings. In the drawings:
[0041] Figure 1 is a circuit diagram of the low-noise amplifier in amplification mode provided in an embodiment of this utility model;
[0042] Figure 2 is a circuit diagram of the low-noise amplifier in bypass mode provided in an embodiment of the present invention;
[0043] Figure 3 is the equivalent RF circuit diagram of the low-noise amplifier in bypass mode provided in the embodiment of this utility model. Detailed Implementation
[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0047] Example 1
[0048] This utility model embodiment provides a low-noise amplifier 100, as shown in Figures 1 to 3, which includes an input matching circuit 1, a first capacitor CB1, a first power amplifier 2, a first resistor R1, a first single-pole single-throw switch S1, a second capacitor CB2, a first inductor LS, a second single-pole single-throw switch S2, a second resistor R2, a second power amplifier 3, a third capacitor C3, a third single-pole single-throw switch S3, a third resistor R3, a second inductor LD, a fourth capacitor C4, and an output matching circuit 4.
[0049] Among them, the first inductor LS is used as the source negative feedback inductor, the second inductor LD is used as the drain choke inductor, the first capacitor CB1 is used as the DC blocking capacitor, the third capacitor C3 and the fourth capacitor C4 are used as the voltage regulation bypass capacitors, and the first resistor R1, the second resistor R2 and the third resistor R3 are used as DC bias resistors.
[0050] The input terminal of the input matching circuit 1 is used to receive the radio frequency signal (RFIN).
[0051] The first terminal of the first capacitor CB1 is connected to the output terminal of the input matching circuit 1.
[0052] The input terminal of the first power amplifier 2 is connected to the second terminal of the first capacitor CB1.
[0053] The first end of the first resistor R1 is connected to the input terminal of the first power amplifier 2, and the second end of the first resistor R1 is used to select ground (GND) or connect to the first bias voltage Vbias1.
[0054] The control terminal of the first single-pole single-throw switch S1 is connected to the output terminal of the input matching circuit 1.
[0055] The first end of the second capacitor CB2 is connected to the output end of the first single-pole single-throw switch S1, and the second end of the second capacitor CB2 is connected to the output end of the first power amplifier 2.
[0056] The first terminal of the first inductor LS is connected to the ground terminal of the first power amplifier 2.
[0057] The control terminal of the second single-pole single-throw switch S2 is connected to the second terminal of the first inductor LS, and the output terminal of the second single-pole single-throw switch S2 is grounded.
[0058] The first end of the second resistor R2 is connected to the second end of the first inductor LS, and the second end of the second resistor R2 is grounded.
[0059] The ground terminal of the second power amplifier 3 is connected to the output terminal of the first power amplifier 2.
[0060] The first terminal of the third capacitor C3 is connected to the input terminal of the second power amplifier 3.
[0061] The control terminal of the third single-pole single-throw switch S3 is connected to the second terminal of the third capacitor C3, and the output terminal of the third single-pole single-throw switch S3 is grounded.
[0062] The first end of the third resistor R3 is connected to the input terminal of the second power amplifier 3, and the second end of the third resistor R3 is used to select the input operating voltage VDD or the input second bias voltage Vbias2.
[0063] The first end of the second inductor LD is connected to the output end of the second power amplifier 3.
[0064] The first terminal of the fourth capacitor C4 is connected to the second terminal of the second inductor LD and is used to select the operating voltage VDD or ground. The second terminal of the fourth capacitor C4 is grounded.
[0065] The input terminal of the output matching circuit 4 is connected to the output terminal of the second power amplifier 3, and the output terminal of the output matching circuit 4 is used to output radio frequency signal (RFOUT).
[0066] In this embodiment, the first bias voltage Vbias1 and the second bias voltage Vbias2 are different bias voltages.
[0067] In this embodiment, the low-noise amplifier 100 further includes a first single-pole double-throw switch DS1; the common terminal of the first single-pole double-throw switch DS1 is connected to the second terminal of the first resistor R1, the first connection terminal of the first single-pole double-throw switch DS1 is used for grounding, and the second connection terminal of the first single-pole double-throw switch DS1 is used to connect to a first bias signal.
[0068] This is equivalent to the second terminal of the first resistor R1 being selectively grounded or connected to the first bias voltage Vbias1 via the first single-pole double-throw switch DS1. When the common terminal of the first single-pole double-throw switch DS1 is connected to the first connection terminal of the first single-pole double-throw switch DS1, the second terminal of the first resistor R1 is used for grounding; when the common terminal of the first single-pole double-throw switch DS1 is connected to the second connection terminal of the first single-pole double-throw switch DS1, the second terminal of the first resistor R1 is used for connecting to the first bias voltage Vbias1.
[0069] Of course, depending on actual needs, the first single-pole double-throw switch DS1 can be replaced with the sixth single-pole single-throw switch and the seventh single-pole single-throw switch (not shown in the figure).
[0070] The control terminal of the sixth single-pole single-throw switch is connected to the second terminal of the first resistor R1, and the output terminal of the sixth single-pole single-throw switch is used for grounding.
[0071] The control terminal of the seventh single-pole single-throw switch is connected to the second terminal of the first resistor R1, and the output terminal of the seventh single-pole single-throw switch is used to connect to the first bias voltage Vbias1.
[0072] At this time, it is equivalent to the second terminal of the first resistor R1 being selected to be grounded or connected to the first bias voltage Vbias1 through the sixth single-pole single-throw switch and the seventh single-pole single-throw switch. When the sixth single-pole single-throw switch is turned on, the second terminal of the first resistor R1 is used to be grounded; when the seventh single-pole single-throw switch is turned on, the second terminal of the first resistor R1 is used to be connected to the first bias voltage Vbias1.
[0073] In this embodiment, the low-noise amplifier 100 further includes a second single-pole double-throw switch DS2; the common terminal of the second single-pole double-throw switch DS2 is connected to the second terminal of the third resistor R3, the first connection terminal of the second single-pole double-throw switch DS2 is used to connect to the operating voltage VDD, and the second connection terminal of the second single-pole double-throw switch DS2 is used to connect to the second bias signal.
[0074] This means that the second terminal of the third resistor R3 is selectively connected to either the operating voltage VDD or the second bias voltage Vbias2 via the second single-pole double-throw switch DS2. When the common terminal of the second single-pole double-throw switch DS2 is connected to its first connection terminal, the second terminal of the third resistor R3 is used to connect to the operating voltage VDD; when the common terminal of the second single-pole double-throw switch DS2 is connected to its second connection terminal, the second terminal of the third resistor R3 is used to connect to the second bias voltage Vbias2.
[0075] Of course, depending on actual needs, the second single-pole double-throw switch DS2 can be replaced with the eighth single-pole single-throw switch and the ninth single-pole single-throw switch (not shown in the figure).
[0076] The control terminal of the eighth single-pole single-throw switch is connected to the second terminal of the third resistor R3, and the output terminal of the eighth single-pole single-throw switch is used to connect to the working voltage VDD.
[0077] The control terminal of the ninth single-pole single-throw switch is connected to the second terminal of the third resistor R3, and the output terminal of the ninth single-pole single-throw switch is used to connect to the second bias voltage Vbias2.
[0078] At this time, the second terminal of the third resistor R3 is equivalent to being connected to either the working voltage VDD or the second bias voltage Vbias2 via the eighth and ninth single-pole single-throw switches. When the eighth single-pole single-throw switch is on, the second terminal of the third resistor R3 is used to connect to the working voltage VDD; when the ninth single-pole single-throw switch is on, the second terminal of the third resistor R3 is used to connect to the second bias voltage Vbias2.
[0079] In this embodiment, the low-noise amplifier 100 further includes a fourth single-pole single-throw switch S4 and a fifth single-pole single-throw switch S5.
[0080] The control terminal of the fourth single-pole single-throw switch S4 is connected to the first terminal of the fourth capacitor C4, and the output terminal of the fourth single-pole single-throw switch S4 is used to connect to the working voltage VDD.
[0081] The control terminal of the fifth single-pole single-throw switch S5 is connected to the first terminal of the fourth capacitor C4, and the output terminal of the fifth single-pole single-throw switch S5 is used for grounding.
[0082] Essentially, the first terminal of the fourth capacitor C4 is connected to the operating voltage VDD or grounded via the fourth single-pole single-throw switch S4 and the fifth single-pole single-throw switch S5, respectively. When the fourth single-pole single-throw switch S4 is on, the first terminal of the fourth capacitor C4 is connected to the operating voltage VDD; when the fifth single-pole single-throw switch S5 is on, the first terminal of the fourth capacitor C4 is grounded.
[0083] Of course, depending on actual needs, the fourth single-pole single-throw switch S4 and the fifth single-pole single-throw switch S5 can be replaced with the third single-pole double-throw switch (not shown in the figure).
[0084] The common terminal of the third single-pole double-throw switch is connected to the first terminal of the fourth capacitor C4. The first connection terminal of the third single-pole double-throw switch is used to connect to the working voltage VDD. The second connection terminal of the second single-pole double-throw switch DS2 is used to ground.
[0085] At this time, it is equivalent to the first terminal of the fourth capacitor C4 being connected to the working voltage VDD or grounded through the third single-pole double-throw switch. When the common terminal of the third single-pole double-throw switch is connected to the first connection terminal of the third single-pole double-throw switch, the first terminal of the fourth capacitor C4 is used to connect to the working voltage VDD; when the common terminal of the third single-pole double-throw switch is connected to the second connection terminal of the third single-pole double-throw switch, the second terminal of the fourth capacitor C4 is used to ground.
[0086] In this embodiment, the first power amplifier 2 includes a first field-effect transistor (CSMOS); the gate of the first CSMOS serves as the input terminal of the first power amplifier 2, the drain of the first CSMOS serves as the output terminal of the first power amplifier 2, and the source of the first CSMOS serves as the ground terminal of the first power amplifier 2. Of course, depending on actual needs, the first power amplifier 2 may also include multiple first CSMOS transistors, or the first CSMOS transistors may be replaced with transistors.
[0087] In this embodiment, the second power amplifier 3 includes a second field-effect transistor (CGMOS); the gate of the second CGMOS serves as the input terminal of the second power amplifier 3, the drain of the second CGMOS serves as the output terminal of the second power amplifier 3, and the source of the second CGMOS serves as the ground terminal of the second power amplifier 3. Of course, depending on actual needs, the second power amplifier 3 may also include multiple second CGMOS transistors, or the second CGMOS transistors may be replaced with transistors.
[0088] The first field-effect transistor, CSMOS, is used as a common-source amplifier, and the second field-effect transistor, CGMOS, is used as a common-gate amplifier.
[0089] As shown in Figure 1, when the low-noise amplifier 100 in this embodiment is in amplification mode, the first single-pole single-throw switch S1 and the fifth single-pole single-throw switch S5 are open, while the second single-pole single-throw switch S2, the third single-pole single-throw switch S3, and the fourth single-pole single-throw switch S4 are open. The common terminal of the first single-pole double-throw switch DS1 is connected to the second connection terminal of the first single-pole double-throw switch DS1, that is, the first resistor R1 is selected to be connected to the first bias voltage Vbias1, thereby making the first field-effect transistor CSMOS work in the subthreshold or saturation region. The common terminal of the second single-pole double-throw switch DS2 is connected to the second connection terminal of the second single-pole double-throw switch DS2, that is, the second terminal of the third resistor R3 is selected to be connected to the second bias circuit, thereby making the second field-effect transistor CGMOS work in the subthreshold or saturation region.
[0090] As shown in Figure 2, when the low-noise amplifier 100 in this embodiment is in bypass mode, the first single-pole single-throw switch S1 and the fifth single-pole single-throw switch S5 are turned on, while the second single-pole single-throw switch S2, the third single-pole single-throw switch S3, and the fourth single-pole single-throw switch S4 are turned off. At this time, the source and drain of the second field-effect transistor CGMOS and the first field-effect transistor CSMOS are pulled down to ground due to the conduction of the fifth single-pole single-throw switch S5. The common terminal of the first single-pole double-throw switch DS1 is connected to the first connection terminal of the first single-pole double-throw switch DS1, that is, the first resistor R1 is grounded, thereby making the first field-effect transistor CSMOS work in the cutoff region, and its source and drain exhibit high impedance. The common terminal of the second single-pole double-throw switch DS2 is connected to the first connection terminal of the second single-pole double-throw switch DS2, that is, the second terminal of the third resistor R3 is connected to the working voltage VDD, thereby making the second field-effect transistor CGMOS work in the deep linear region, and its source and drain exhibit low impedance. The RF signal passes through the first single-pole single-throw switch S1 → the second capacitor CB2 → the second field-effect transistor CGMOS to complete the bypass function. The second single-pole single-throw switch S2 is disconnected to prevent signal leakage to ground caused by the parasitic effect of the first field-effect transistor CSMOS.
[0091] As shown in Figure 3, in this embodiment, the total equivalent capacitance (CP) to ground of all devices on the bypass mode node of the low-noise amplifier 100, including the parasitic capacitances of the second field-effect transistor CGMOS, the third capacitor C3, and the third single-pole single-throw switch S3, can be absorbed by the output matching circuit 4 to reduce its impact on the performance of the low-noise amplifier 100. In this embodiment, the low-noise amplifier 100 utilizes the different equivalent devices of the common-source first field-effect transistor CSMOS and the common-gate second field-effect transistor CGMOS under different bias voltages to achieve path multiplexing, i.e., multiplexing of active amplification and passive bypass. This reduces the number of devices required for the bypass mode circuit, simplifies the routing of the low-noise amplifier 100, and improves its wiring flexibility.
[0092] Compared with the prior art, the low-noise amplifier 100 in this embodiment is designed with an input matching circuit 1, a first capacitor CB1, a first power amplifier 2, a first resistor R1, a first single-pole single-throw switch S1, a second capacitor CB2, a first inductor LS, a second single-pole single-throw switch S2, a second resistor R2, a second power amplifier 3, a third capacitor C3, a third single-pole single-throw switch S3, a third resistor R3, a second inductor LD, a fourth capacitor C4, and an output matching circuit 4, and the connection method of each device is defined. This reduces the number of devices required for the bypass mode circuit, which facilitates the routing of the low-noise amplifier 100 and improves its wiring flexibility. At the same time, the output matching circuit 4 can absorb the equivalent capacitance to ground of all devices on the bypass mode node to reduce the impact on the performance of the low-noise amplifier 100.
[0093] Example 2
[0094] This embodiment provides a radio frequency (RF) power amplifier module, which includes the low-noise amplifier 100 described in Embodiment 1 above. Since the RF power amplifier module in this embodiment includes the low-noise amplifier 100 described in Embodiment 1 above, it can also achieve the same technical effects as the low-noise amplifier 100 described in Embodiment 1 above, and will not be described in detail here.
[0095] It should be noted that the various embodiments described above with reference to the accompanying drawings are only illustrative of the present invention and not intended to limit its scope. Those skilled in the art should understand that any modifications or equivalent substitutions made to the present invention without departing from its spirit and scope should be covered within the scope of the present invention. Furthermore, unless the context otherwise requires, singular terms include plural forms, and vice versa. Additionally, unless specifically stated otherwise, all or part of any embodiment may be used in conjunction with all or part of any other embodiment.
Claims
1. A low-noise amplifier, characterized in that, The low-noise amplifier includes an input matching circuit, a first capacitor, a first power amplifier, a first resistor, a first single-pole single-throw switch, a second capacitor, a first inductor, a second single-pole single-throw switch, a second resistor, a second power amplifier, a third capacitor, a third single-pole single-throw switch, a third resistor, a second inductor, a fourth capacitor, and an output matching circuit. The input terminal of the input matching circuit is used to receive radio frequency signals; The first terminal of the first capacitor is connected to the output terminal of the input matching circuit; The input terminal of the first power amplifier is connected to the second terminal of the first capacitor; The first end of the first resistor is connected to the input terminal of the first power amplifier, and the second end of the first resistor is used to select grounding or to connect to the first bias voltage. The control terminal of the first single-pole single-throw switch is connected to the output terminal of the input matching circuit; The first end of the second capacitor is connected to the output end of the first single-pole single-throw switch, and the second end of the second capacitor is connected to the output end of the first power amplifier. The first end of the first inductor is connected to the ground terminal of the first power amplifier; The control terminal of the second single-pole single-throw switch is connected to the second terminal of the first inductor, and the output terminal of the second single-pole single-throw switch is grounded. The first end of the second resistor is connected to the second end of the first inductor, and the second end of the second resistor is grounded. The ground terminal of the second power amplifier is connected to the output terminal of the first power amplifier; The first terminal of the third capacitor is connected to the input terminal of the second power amplifier; The control terminal of the third single-pole single-throw switch is connected to the second terminal of the third capacitor, and the output terminal of the third single-pole single-throw switch is grounded. The first end of the third resistor is connected to the input terminal of the second power amplifier, and the second end of the third resistor is used to select the operating voltage or the second bias voltage. The first end of the second inductor is connected to the output terminal of the second power amplifier; The first terminal of the fourth capacitor is connected to the second terminal of the second inductor and is used to select the operating voltage or ground. The second terminal of the fourth capacitor is grounded. The input terminal of the output matching circuit is connected to the output terminal of the second power amplifier, and the output terminal of the output matching circuit is used to output radio frequency signals.
2. The low-noise amplifier as described in claim 1, characterized in that, The low-noise amplifier further includes a first single-pole double-throw switch; the common terminal of the first single-pole double-throw switch is connected to the second terminal of the first resistor, the first connection terminal of the first single-pole double-throw switch is used for grounding, and the second connection terminal of the first single-pole double-throw switch is used to connect to a first bias signal.
3. The low-noise amplifier as described in claim 1, characterized in that, The low-noise amplifier also includes a second single-pole double-throw switch; the common terminal of the second single-pole double-throw switch is connected to the second terminal of the third resistor, the first connection terminal of the second single-pole double-throw switch is used to connect to the operating voltage, and the second connection terminal of the second single-pole double-throw switch is used to connect to the second bias signal.
4. The low-noise amplifier as described in claim 1, characterized in that, The low-noise amplifier also includes a fourth single-pole single-throw switch and a fifth single-pole single-throw switch; The control terminal of the fourth single-pole single-throw switch is connected to the first terminal of the fourth capacitor, and the output terminal of the fourth single-pole single-throw switch is used to connect to the working voltage. The control terminal of the fifth single-pole single-throw switch is connected to the first terminal of the fourth capacitor, and the output terminal of the fifth single-pole single-throw switch is used for grounding.
5. The low-noise amplifier as described in claim 1, characterized in that, The low-noise amplifier also includes a sixth single-pole single-throw switch and a seventh single-pole single-throw switch; The control terminal of the sixth single-pole single-throw switch is connected to the second terminal of the first resistor, and the output terminal of the sixth single-pole single-throw switch is used for grounding. The control terminal of the seventh single-pole single-throw switch is connected to the second terminal of the first resistor, and the output terminal of the seventh single-pole single-throw switch is used to connect to the first bias voltage.
6. The low-noise amplifier as described in claim 1, characterized in that, The low-noise amplifier also includes an eighth single-pole single-throw switch and a ninth single-pole single-throw switch; The control terminal of the eighth single-pole single-throw switch is connected to the second terminal of the third resistor, and the output terminal of the eighth single-pole single-throw switch is used to connect to the working voltage. The control terminal of the ninth single-pole single-throw switch is connected to the second terminal of the third resistor, and the output terminal of the ninth single-pole single-throw switch is used to connect to the second bias voltage.
7. The low-noise amplifier as claimed in claim 1, characterized in that, The low-noise amplifier also includes a third single-pole double-throw switch; the common terminal of the third single-pole double-throw switch is connected to the first terminal of the fourth capacitor, the first connection terminal of the third single-pole double-throw switch is used to connect to the operating voltage, and the second connection terminal of the second single-pole double-throw switch is used to ground.
8. The low-noise amplifier as described in claim 1, characterized in that, The first power amplifier includes a first field-effect transistor (FET); the gate of the first FET serves as the input terminal of the first power amplifier, the drain of the first FET serves as the output terminal of the first power amplifier, and the source of the first FET serves as the ground terminal of the first power amplifier.
9. The low-noise amplifier as claimed in claim 1, characterized in that, The second power amplifier includes a second field-effect transistor (FET); the gate of the second FET serves as the input terminal of the second power amplifier, the drain of the second FET serves as the output terminal of the second power amplifier, and the source of the second FET serves as the ground terminal of the second power amplifier.
10. A radio frequency power amplifier module, characterized in that, The radio frequency power amplifier module includes a low-noise amplifier as described in any one of claims 1 to 9.