Low-noise amplification circuit and radio frequency front-end module

Abstract

The invention provides a low-noise amplification circuit and a radio frequency front-end module. The low-noise amplification circuit comprises a low-noise amplifier, at least one inductance coil and at least two impedance adjusting modules, the first end of the inductance coil is connected with the low-noise amplifier, and the second end of the inductance coil is connected with a power supply end; the inductance coil further comprises at least one external connection end, and the external connection end is located between the first end and the second end of the inductance coil. The first end of each impedance adjusting module is connected with the first end or the external end of the inductance coil, and the second end of each impedance adjusting module is set as an output end. According to the low-noise amplification circuit, output insertion loss can be reduced, circuit gain can be improved, and the layout area of the inductance coil can be reduced.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to a low-noise amplifier circuit and a radio frequency front-end module. Background Technology

[0002] Low-noise amplifiers (LNAs) are one of the core components in radio frequency and analog signal processing. With the evolution of semiconductor technology and communication systems, LNAs have gradually become key circuits in fields such as wireless communication, radar, satellite reception, and medical imaging.

[0003] In a multi-output link of a low-noise amplifier circuit, each output terminal requires a corresponding control switch and a matching inductor. For example, if two output terminals correspond to frequency bands n77 and n79 respectively, one control switch controls the n77 frequency band, and the other control switch controls the n79 frequency band. Therefore, control switches are required for output terminals corresponding to different frequency bands, and the corresponding matching inductors need to be adjusted separately, resulting in higher output insertion loss and lower circuit gain. Summary of the Invention

[0004] The main objective of this application is to provide a low-noise amplifier circuit and an RF front-end module, which aims to reduce the output insertion loss of the low-noise amplifier circuit and thereby improve the circuit gain.

[0005] In a first aspect, this application provides a low-noise amplifier circuit, comprising:

[0006] Low-noise amplifiers are used to amplify radio frequency signals in different frequency bands;

[0007] At least one inductor, a first end of which is connected to the low-noise amplifier, and a second end of which is used to connect to a power supply terminal; the inductor also includes at least one external terminal located between the first and second ends of the inductor.

[0008] At least two impedance adjustment modules are provided, with the first end of each impedance adjustment module connected to the first end of the inductor coil or the external terminal, and the second end of each impedance adjustment module being configured as an output terminal.

[0009] Secondly, embodiments of this application also provide a low-noise amplifier circuit, comprising:

[0010] Low-noise amplifiers are used to amplify radio frequency signals in different frequency bands;

[0011] A first impedance matching circuit includes a first inductor and at least two first impedance adjustment modules. A first end of the first inductor is connected to the low-noise amplifier, and a second end of each of the first inductors is connected to a power supply terminal. The first inductor includes at least one first external terminal located between the first and second ends of the first inductor. The first end of each first impedance adjustment module is connected to either the first end of the first inductor or the external terminal, and the second end of each first impedance adjustment module is configured as a first output terminal.

[0012] The second impedance matching circuit includes a second inductor and at least two second impedance adjustment modules. The first end of the second inductor is connected to the low-noise amplifier, and the second end of the second inductor is connected to the power supply terminal. The second inductor includes at least one second external terminal, which is located between the first and second ends of the second inductor. The first end of each second impedance adjustment module is connected to either the first end of the second inductor or the external terminal, and the second end of each second impedance adjustment module is configured as a second output terminal.

[0013] Thirdly, embodiments of this application also provide a low-noise amplifier circuit, including:

[0014] Low-noise amplifiers are used to amplify radio frequency signals in different frequency bands;

[0015] At least one inductor, a first end of which is connected to the low-noise amplifier, and a second end of which is used to connect to a power supply terminal; the inductor is configured as a multi-turn winding structure, the winding structure including at least one external terminal, the winding structure of the inductor being divided into at least two segments with the at least one external terminal of the inductor as a dividing point;

[0016] At least two impedance adjustment modules are provided, with the first end of each impedance adjustment module connected to the first end of the inductor coil or the external terminal, and the second end of each impedance adjustment module being configured as an output terminal.

[0017] Fourthly, embodiments of this application also provide a radio frequency front-end module, including a low-noise amplifier circuit as described in any one of the embodiments of this application.

[0018] This application provides a low-noise amplifier circuit and an RF front-end module. The low-noise amplifier circuit improves the connection method between the inductor and the impedance adjustment module by setting an external terminal on the inductor and connecting it to the impedance adjustment module to form a new output terminal. This eliminates the need for additional control switches and allows for output impedance matching across different operating frequency bands. Therefore, the number of control switches can be reduced, thereby reducing output insertion loss and improving circuit gain. Simultaneously, the number of inductors is reduced, thus decreasing the layout area. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A circuit diagram of a low-noise amplifier circuit provided for related implementation methods;

[0021] Figure 2 A circuit diagram of a low-noise amplifier circuit provided in an embodiment of this application;

[0022] Figure 3 A circuit diagram of a first embodiment of the low-noise amplifier circuit provided in this application;

[0023] Figure 4 A circuit diagram of a second embodiment of the low-noise amplifier circuit provided in this application;

[0024] Figure 5 A circuit diagram of a third embodiment of the low-noise amplifier circuit provided in this application.

[0025] Figure 6 A circuit diagram of a fourth embodiment of the low-noise amplifier circuit provided in this application.

[0026] Figure 7 Simulation results of two low-noise amplifier circuits provided in the embodiments of this application are shown in the figure.

[0027] Figure 8 A circuit diagram illustrating one embodiment of the inductor coil provided in this application;

[0028] Figure 9 A circuit diagram illustrating another embodiment of the inductor coil provided in this application;

[0029] Figure 10A circuit diagram illustrating yet another embodiment of the inductor coil provided in this application.

[0030] Figure 11 A circuit diagram of one embodiment of the impedance adjustment module provided in this application;

[0031] Figure 12 A circuit diagram of another embodiment of the impedance adjustment module provided in this application;

[0032] Figure 13 A circuit diagram of yet another embodiment of the impedance adjustment module provided in this application;

[0033] Figure 14 A circuit diagram of one embodiment of the low-noise amplifier provided in this application;

[0034] Figure 15 A circuit diagram of another low-noise amplifier circuit provided in an embodiment of this application;

[0035] Figure 16 A circuit diagram of yet another low-noise amplifier circuit provided in an embodiment of this application;

[0036] Figure 17 This is a schematic block diagram of a radio frequency front-end module provided in an embodiment of this application.

[0037] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0039] It should also be noted that the methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged, and some steps can also be deleted.

[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] Figure 1 A circuit diagram of a low-noise amplifier circuit is provided for related implementation methods. For example... Figure 1As shown, in a conventional dual-output circuit, each output terminal requires a corresponding control switch and a matching inductor. For example, if the two output terminals Out1 and Out2 correspond to frequency bands n77 and n79 respectively, the first control switch K1 controls the signal output of the n77 frequency band, and the other control switch K2 controls the signal output of the n79 frequency band. Therefore, control switches are required for different frequency bands, and the corresponding matching inductors need to be adjusted separately. Figure 1 When either control switch K1 or K2 is turned on, the inductance value of the left inductor needs to be adjusted accordingly. In practical applications, it has been found that this low-noise amplifier circuit has high output insertion loss and low circuit gain.

[0042] Next, combined Figures 2 to 6 This application introduces a low-noise amplifier circuit according to an embodiment. This low-noise amplifier circuit can solve the problems of high output insertion loss and low circuit gain in current low-noise amplifier circuits.

[0043] like Figure 2 As shown, Figure 2 A circuit diagram of a low-noise amplifier circuit provided for an embodiment of this application.

[0044] Specifically, the low-noise amplifier circuit 100 includes a low-noise amplifier 110, at least one inductor (such as inductor 120), and at least two impedance adjustment modules (such as two impedance adjustment modules 130).

[0045] The low-noise amplifier 110 is used to amplify radio frequency (RF) signals of different frequency bands. For example, the low-noise amplifier 110 can receive RF signals F1 transmitted from the antenna and amplify them for processing by subsequent circuits. There can be one or more RF signals F1. When there are multiple RF signals F1, their frequency bands can be different, or multiple RF signals in the same frequency band can exist. The low-noise amplifier 110 has a low noise figure, causes less interference to the RF signal, and improves the signal-to-noise ratio of the amplified RF signal.

[0046] The number of inductors 120 is at least one, such as one or more inductors 120. A first end of each inductor 120 is connected to a low-noise amplifier 110, and a second end of each inductor 120 is connected to a power supply terminal Vdd. Each inductor 120 also includes at least one external terminal (such as terminal a), located between the first and second ends of the inductor 120. That is, when there is one inductor 120, there can be one or more external terminals (such as terminal a). When there are multiple inductors 120, each inductor 120 can have one or more external terminals, and the number of external terminals in different inductors 120 can be the same or different. It should be noted that when there are multiple inductors 120, the multiple inductors 120 are connected in parallel, for example, the first ends of multiple inductors 120 are all connected to the low-noise amplifier 110, and the second ends of multiple inductors 120 are all connected to the power supply terminal Vdd. The specific location of the external terminal (e.g., terminal a) between the first and second terminals of inductor 120 can be determined according to actual conditions, such as the inductance value required for amplifying different frequency bands of radio frequency signals. The first terminal of inductor 120 can be the starting terminal of inductor 120, and the second terminal of inductor 120 can be the ending terminal of inductor 120. The power supply terminal Vdd can be provided directly by the power supply or through an intermediate module such as a low dropout linear regulator (LDO).

[0047] The number of impedance adjustment modules 130 is at least two, such as two or more impedance adjustment modules 130. The first terminal of each impedance adjustment module 130 is connected to the first terminal or an external terminal of the inductor coil 120, and the second terminal of each impedance adjustment module 130 is set as an output terminal. Each impedance adjustment module 130 is used to adjust the impedance value corresponding to amplified radio frequency signals of different frequency bands. For example, one impedance adjustment module 130 is used to adjust the impedance value corresponding to the amplified radio frequency signal F2, and another impedance adjustment module 130 is used to adjust the impedance value corresponding to the amplified radio frequency signal F3. The radio frequency signals F2 and F3 have different frequency bands. For example, the frequency band of radio frequency signal F2 is n77, and the frequency band of radio frequency signal F3 is n79. Therefore, the output terminal of each impedance adjustment module 130 can be used to output amplified radio frequency signals of different frequency bands.

[0048] It should be noted that the low-noise amplifier circuit 100 usually needs to amplify different frequency bands of radio frequency signals according to the actual situation. Since the required inductance value is different when amplifying different frequency bands of radio frequency signals, this embodiment connects the first end of the inductor coil 120 to an impedance adjustment module 130 and connects the external end (such as end a) of the inductor coil 120 to another impedance adjustment module 130. The second end of the inductor coil 120 is connected to the power supply terminal Vdd, thereby achieving output impedance matching under different operating frequency bands. Furthermore, the switching between radio frequency signal F2 and radio frequency signal F3 can be achieved through the adjustment function of the impedance adjustment module 130 itself, without the need for an additional control switch.

[0049] The following is based on Figures 3 to 6 Taking different numbers of inductors and different numbers of impedance adjustment modules as an example, the connection methods between more inductors and more impedance adjustment modules can be explained in the same way.

[0050] For example, such as Figure 3 As shown, at least one inductor includes a first inductor 121, the first inductor 121 includes a first external terminal a1; at least two impedance adjustment modules include a first impedance adjustment module 131 and a second impedance adjustment module 132; the first impedance adjustment module 132 is connected to the first terminal of the first inductor 121, and the second impedance adjustment module 132 is connected to the first external terminal a1.

[0051] It should be noted that the first impedance adjustment module 131 connected to the first end of the first inductor coil 121 is used to output a radio frequency signal in the first frequency band, and the second impedance adjustment module 132 connected to the first external terminal a1 is used to output a radio frequency signal in the second frequency band. The frequency of the radio frequency signal in the first frequency band is lower than the frequency of the radio frequency signal in the second frequency band. Specifically, when two impedance adjustment modules are connected to the first inductor coil 121, the larger the inductance value of the first impedance adjustment module 131 connected to the first end of the first inductor coil 121, the lower the frequency band of the output signal. The smaller the inductance value of the second impedance adjustment module 132 connected to the first external terminal a1 of the first inductor coil 121, the higher the frequency band of the output signal.

[0052] For example, such as Figure 4 As shown, at least one inductor includes a first inductor 121, which includes a first external terminal a1 and a second external terminal a2. The first external terminal a1 is closer to the first end of the first inductor 121 than the second external terminal a2. At least two impedance adjustment modules include a first impedance adjustment module 131 and a second impedance adjustment module 132. The first impedance adjustment module 131 is connected to the first external terminal a1, and the second impedance adjustment module 132 is connected to the second external terminal a2.

[0053] It should be noted that the first impedance adjustment module 131 connected to the first external terminal a1 of the first inductor coil 121 is used to output a radio frequency signal in the first frequency band, and the second impedance adjustment module 132 connected to the second external terminal a2 is used to output a radio frequency signal in the second frequency band. The frequency of the radio frequency signal in the first frequency band is lower than the frequency of the radio frequency signal in the second frequency band. Specifically, when different impedance adjustment modules are connected to multiple external terminals of the first inductor coil 121, the larger the inductance value of the first impedance adjustment module 131 connected to the first external terminal a1 closest to the first end of the first inductor coil 121, the lower the frequency band of the corresponding output signal. Conversely, the smaller the inductance value of the second impedance adjustment module 132 connected to the second external terminal a2 closest to the second end of the inductor coil, the higher the frequency band of the corresponding output signal.

[0054] For example, such as Figure 5 As shown, at least one inductor includes a first inductor 121, which includes a first external terminal a1 and a second external terminal a2. The first external terminal a1 is closer to the first end of the first inductor 121 than the second external terminal a2. At least two impedance adjustment modules include a first impedance adjustment module 131, a second impedance adjustment module 132, and a third impedance adjustment module 133. The first impedance adjustment module 131 is connected to the first end of the first inductor 121, the second impedance adjustment module 132 is connected to the first external terminal a1, and the third impedance adjustment module 133 is connected to the second external terminal a2.

[0055] It should be noted that the frequency ranges of the RF signals output by the first impedance adjustment module 131, the second impedance adjustment module 132, and the third impedance adjustment module 133 can be determined with reference to the aforementioned example, and will not be repeated here. The low-noise amplifier circuit 100 can use only one inductor (such as the first inductor 121). By connecting one inductor, the frequency band requirements of two or more output terminals can be met, which can effectively reduce the circuit layout area, reduce the number of switches, simplify the circuit, and improve the gain.

[0056] In one example, such as Figure 6As shown, at least one inductor includes a first inductor 121 and a second inductor 122. The first ends of the first inductor 121 and the second inductor 122 are connected to a low-noise amplifier 110, and the second ends of the first inductor 121 and the second inductor 122 are connected to a power supply terminal Vdd. The first inductor 121 includes a first external terminal a1, and the second inductor 122 includes a second external terminal a2. At least two impedance adjustment modules include a first impedance adjustment module 131, a second impedance adjustment module 132, a third impedance adjustment module 133, and a fourth impedance adjustment module 134. The first impedance adjustment module 131 is connected to the first end of the first inductor 121, and the second impedance adjustment module 132 is connected to the first external terminal a1. The third impedance adjustment module 133 is connected to the first end of the second inductor 122, and the fourth impedance adjustment module 134 is connected to the second external terminal a2.

[0057] It should be noted that a switching unit (not shown in the figure) can also be set between the power supply terminal Vdd and the second terminal of the inductor (such as the first inductor 121 and the second inductor 122) to control the on / off state of the power supply channel. When there are multiple output terminals of the low-noise amplifier circuit 100, impedance adjustment is required for different output terminals. This can be achieved by adjusting the function of each impedance adjustment module 120 to meet the output requirements of different terminals. Since each impedance adjustment module 120 itself has an adjustment function, combining the connected inductor 120 and the adjustment function of the impedance adjustment module 120 can simultaneously eliminate the need for control switches corresponding to multiple output terminals and reduce the number of inductors 120.

[0058] For example, such as Figure 7 As shown, M1, M2, M3, and M8 represent radio frequency signals in different frequency bands, and dB(S(2,1)) is... Figure 3 The simulation results of the circuit structure shown (corresponding to line segment 12) are as follows: dB(S(4,3)) Figure 1 The simulation results of the circuit structure shown are (corresponding to line segment 11). Based on this, line segment 11 is used to characterize... Figure 1 The gain of the circuit structure shown. Line segment 12 is used to characterize... Figure 3 The gain of the circuit structure shown is as follows. It can be seen that, compared with the low-noise amplifier circuit of the current embodiment, the gain of the low-noise amplifier circuit provided in this application embodiment is 0.3-0.4dB higher.

[0059] The low-noise amplifier circuit 100 in this embodiment of the application forms a new output terminal by providing an external terminal on the inductor coil 120 and connecting the external terminal to the impedance adjustment module 130. This enables output impedance matching at different operating frequency bands and eliminates the need for additional control switches to control each output terminal. Therefore, the number of control switches can be reduced, thereby reducing the output insertion loss of the low-noise amplifier circuit 100 and improving its gain. Simultaneously, by reducing the number of inductors, the layout area of ​​the low-noise amplifier circuit 100 can be reduced.

[0060] In one embodiment, such as Figures 8 to 10 As shown, the inductor coil 120 can be configured as a multi-turn winding structure. It should be noted that the inductor coil 120 can be formed by routing traces onto a substrate, for example, on one or more sub-boards, with the traces configured as a multi-turn winding structure. The first end 21 of this winding structure can be the starting end of the inductor coil 120, and the second end 22 of the winding structure can be the ending end of the inductor coil 120.

[0061] For example, such as Figure 8 As shown, at least one external terminal 'a' is located in the middle of the surrounding structure. This middle location can be the position at the middle length of the trace in the surrounding structure, or it can be a position that characterizes the middle inductance value of the surrounding structure. In practical applications, there can be one or more external terminals in the inductor coil 120, one of which can be located in the middle of the surrounding structure and connected to an impedance adjustment module 130 to form a new output terminal, thereby reducing the number of inductor coils 120 and thus reducing the layout area.

[0062] For example, such as Figure 9 As shown, at least one external terminal a is located at a quarter position of the winding structure. This quarter position can be located at a quarter position of the total trace length starting from the first or second end of the winding structure, or it can be a position that characterizes a quarter of the inductance value of the winding structure. Therefore, in the embodiments of this application, the external terminal a can be designed specifically according to usage requirements or performance requirements. Compared with traditional coil and inductor structures, this structure is more flexible and adaptable.

[0063] In one embodiment, the inductor coil 120 may further include multiple external terminals located at different positions within the surrounding structure. It should be noted that when the inductor coil 120 includes multiple external terminals, each external terminal located at a different position within the surrounding structure can be connected to an impedance adjustment module 130, thereby meeting the impedance adjustment requirements of different frequency bands of radio frequency signals, and allowing for targeted design and adjustment of impedance adjustment based on the specific product. This is equivalent to achieving multiple frequency band signal outputs based on the same inductor coil 120.

[0064] It should be noted that when different impedance adjustment modules 130 are connected to the multiple external terminals of the inductor coil 120, the larger the inductance value of the impedance adjustment module 130 connected to the external terminal closer to the input terminal of the inductor coil 120, the lower the frequency band of the corresponding output signal. Conversely, the smaller the inductance value of the impedance adjustment module 130 connected to the external terminal closer to the output terminal of the inductor coil 120, the higher the frequency band of the corresponding output signal.

[0065] In one example, such as Figures 8 to 10 As shown, the winding structure of the inductor 120 is divided into at least two segments, with at least one external terminal a as the dividing point. The trace length and / or trace width of each segment are different. For example, if there is only one external terminal a of the inductor 120, the first segment of the winding structure is defined as the section from the first end 21 to the external terminal a, and the second segment is defined as the section from the external terminal a to the second end 22. The trace length and trace width of the first and second segments are different.

[0066] It should be noted that since different frequency bands of radio frequency signals require different inductance values, the trace length and trace width of each segment of the surround structure can be set specifically during setup. This can improve the quality factor Q value of the inductor coil 120 while saving area, thereby increasing the gain of the low-noise amplifier circuit 100.

[0067] In one example, the inductor coil 120 has two external terminals, one located at the one-quarter position of the winding structure and the other located at the three-quarter position of the winding structure. Figure 10 As shown, the multiple external terminals include external terminal a1 and external terminal a2. External terminal a1 is located at one-quarter position of the surrounding structure, and external terminal a2 is located at three-quarter position of the surrounding structure.

[0068] In one example, the inductor coil 120 includes a surrounding center, and the spacing between adjacent first traces is greater than the spacing between adjacent second traces. The first traces are traces in the surrounding structure away from the surrounding center, and the second traces are traces in the surrounding structure close to the surrounding center. That is, the spacing between two adjacent windings of the surrounding structure away from the surrounding center is greater than the spacing between two adjacent windings of the surrounding structure close to the surrounding center. By setting specific spacing between the windings at different positions around the surrounding center, the arrangement structure of the inductor coil 120 is controlled, effectively improving the quality factor Q value of the inductor coil 120 while saving area.

[0069] For example, such as Figure 8 As shown, the two adjacent rings of the surrounding structure on the side away from the center 20 are b1, and the two adjacent rings of the surrounding structure on the side closer to the center 20 are b2. The spacing between b1 can be set to be greater than the spacing between b2. In other words, it can be configured to widen the spacing between the two adjacent rings of the surrounding structure on the side away from the center 20, and narrow the spacing between the two adjacent rings of the surrounding structure on the side closer to the center 20.

[0070] It should be noted that, during setup, the wraparound structures b1 and b2 can also be configured to group every two adjacent traces together; see details below. Figure 8 The coil structure is illustrated using a six-turn loop as an example. From the center 20 outwards, the coils are arranged sequentially from the first loop, the second loop, to the outermost sixth loop. The first and second loops can form a single loop structure b2, the third and fourth loops can form a single loop, and the fifth and sixth loops can form a single loop structure b1. In this embodiment, the coils at different positions are divided according to the above rules to form corresponding loop structures. The distance between two adjacent loop structures b1 is greater than the distance between two adjacent loop structures b2. Furthermore, the distance D3 between the two coils within each loop structure b1 is the same, and the distance D4 between the two coils within each loop structure b2 is the same, with distance D3 being greater than or equal to distance D4.

[0071] In this embodiment, by defining two or more adjacent coil turns as corresponding winding structures and making specific spacings between the winding structures at different positions of the winding center 20, the arrangement structure of the inductor coil is controlled. This not only saves area but also reserves layout space for other components, rationally optimizes the entire wiring method, effectively improves the quality factor Q value of the inductor coil 120, and increases the gain of the low-noise amplifier circuit 100 as needed.

[0072] It should be noted that when the winding structure of the inductor coil 120 is a regular shape, such as a circle or a square, the winding center 20 can be the center of symmetry of the corresponding shape. When the winding structure of the inductor coil 120 is an irregular shape, the winding center 20 can be the geometric center of the corresponding shape. Since not all inductor coil 120 traces need to be widened, and the wider the traces, the higher the Q value, the spacing between two adjacent windings on the side away from the winding center 20 is set to be greater than the spacing between two adjacent windings on the side closer to the winding center 20. This can appropriately save circuit layout area, facilitate trace widening, thereby improving the Q value of the inductor coil 120, and thus improving the gain of the low-noise amplifier circuit 100.

[0073] for example Figures 8 to 10 As shown, the spacing between the outermost two coils in the top and bottom positions is greater than the spacing between the inner coils in the same position, and the spacing between the outermost two coils in the left and right positions is also greater than the spacing between the inner coils in the same position. Meanwhile, at the same distance from the center 20, the spacing between the coils in the left and right positions can be smaller than the spacing between the coils in the top and bottom positions.

[0074] In one embodiment, such as Figure 11 As shown, each impedance adjustment module 130 may include an adjustable capacitor unit 1301, which is configured to adjust impedance within a set capacitance value range. There may be one or more adjustable capacitor units 1301, and multiple adjustable capacitor units 1301 can be connected in series or parallel as needed. The adjustable capacitor unit 1301 has a capacitance adjustment function, and the set capacitance value range can be determined based on the capacitance adjustment capability of the adjustable capacitor unit 1301, thereby achieving impedance adjustment of the radio frequency signal in the corresponding frequency band.

[0075] For example, such as Figure 11 As shown, the adjustable capacitor unit 1301 includes multiple cascaded first branches, each first branch including at least a first switch K11 and a first capacitor C11 connected in series. In some cases, there can be multiple first switches K11 and first capacitors C11 in the first branch, and these multiple first switches K11 and multiple first capacitors C11 can also be connected in series or parallel according to the actual situation. Furthermore, the connection order of the first switches K11 and first capacitors C11 can also be set according to the actual situation. Specifically, in one first branch, a first switch K11 and a first capacitor C11 are connected in series, with the first capacitor C11 positioned closer to the signal output terminal; while in another first branch, a first switch K11 and a first capacitor C11 are connected in series, with the first switch K11 positioned closer to the signal output terminal.

[0076] In this embodiment, the first capacitor C11 on each first branch can be of the same or different models. For example, the first capacitor C11 on different first branches can be of the same model. Similarly, the first switch K11 on each first branch can be of the same or different models. For example, the first switch K11 on different first branches can be of different models. The positions of the first switch K11 and the first capacitor C11 can be adjusted according to actual conditions. By adjusting the positions of the first switch K11 and the first capacitor C11 on different first branches, the selectivity of the circuit structure corresponding to the first branch is enhanced, and different design requirements are met.

[0077] In one embodiment, such as Figure 12 As shown, each impedance adjustment module 130 includes an adjustable resistor unit 1302, which is configured to adjust the impedance within a set resistance value range. There can be one or more adjustable resistor units 1302, and multiple adjustable resistor units 1302 can be connected in series or parallel as needed. The adjustable resistor unit 1302 has a resistance adjustment function, and the set resistance value range can be determined based on the resistance adjustment capability of the adjustable resistor unit 1302, thereby achieving impedance adjustment of the radio frequency signal in the corresponding frequency band.

[0078] For example, such as Figure 12 As shown, the adjustable resistor unit 1302 includes multiple cascaded second branches, each second branch including at least a second switch K12 and an attenuator IC1 connected in parallel. In some cases, there can be multiple second switches K12 and attenuators IC1 in the second branch, and multiple first switches K12 and multiple attenuators IC1 can also be connected in series or parallel according to the actual situation. Furthermore, the connection order of the second switches K12 and attenuators IC1 can also be set according to the actual situation. Specifically, in one second branch, one second switch K12 and one attenuator IC1 are connected in parallel. In another second branch, one second switch K12 and two attenuators IC1 are connected in parallel; the two attenuators IC1 can be connected in series or in parallel.

[0079] For example, such as Figure 13As shown, the adjustable resistor unit 1302 includes multiple cascaded second branches, each second branch including at least a second switch K12 and an attenuator IC1 connected in series. In some cases, there can be multiple second switches K12 and attenuators IC1 in the second branch, and multiple first switches K12 and multiple attenuators IC1 can also be connected in series or parallel according to the actual situation. At the same time, the connection order of the second switches K12 and attenuators IC1 can also be set according to the actual situation. Specifically, in one second branch, a second switch K12 and an attenuator IC1 are connected in series, and the attenuator IC1 is located on the side closer to the signal output terminal; while in another second branch, a second switch K12 and an attenuator IC1 are connected in series, and the second switch K12 is located on the side closer to the signal output terminal.

[0080] In this embodiment, the attenuator IC1 may include a variable attenuator. The attenuator IC1 can be a resistor, PIN diode, FET, HEMT, or CMOS transistor, and is fabricated using GaAs, GaN, SiC, or CMOS processes. The attenuator IC1 on each second branch can be configured with the same or different resistors; for example, attenuators IC1 on different second branches can be configured with resistors of the same type. Similarly, the second switch K12 on each second branch can be configured with the same or different types; for example, the second switch K12 on different second branches can be configured with capacitors C11 of different types. The positions of the second switch K12 and the attenuator IC1 can be adjusted according to actual conditions. By adjusting the positions of the second switch K12 and the attenuator IC1 on different second branches, the selectivity of the circuit structure corresponding to that second branch is enhanced, thereby meeting different design requirements.

[0081] For example, the adjustable resistor unit 1302 includes a PI attenuator or a T-type attenuator, and may also include a bridging T-type network. The PI attenuator has a structure of two resistors connected in parallel to ground, and then a resistor connected in series, with an overall shape resembling the letter pi. The T-type attenuator includes two cascaded resistors and a resistor connected in parallel to ground, with a circuit shape resembling the letter T.

[0082] In one embodiment, each impedance adjustment module includes an adjustable capacitor unit 1301 and an adjustable resistor unit 1302. The adjustable capacitor unit 1301 is configured to perform impedance adjustment within a set capacitance value range, and the adjustable resistor unit 1302 is configured to perform impedance adjustment within a set resistance value range.

[0083] It should be noted that the adjustable capacitor unit 1301 and the adjustable resistor unit 1302 can be connected in series or in parallel. The specific structures of the adjustable capacitor unit 1301 and the adjustable resistor unit 1302 can be set according to actual conditions. For example, the specific structure of the adjustable capacitor unit 1301 can be configured as follows: Figure 9 The specific structure of the adjustable resistor unit 1302 can be configured according to... Figure 10 Configure the settings. The connection order of the adjustable capacitor unit 1301 and the adjustable resistor unit 1302 can also be set according to actual conditions. For example, the connection order of the adjustable capacitor unit 1301 and the adjustable resistor unit 1302 can be interchanged, or multiple adjustable capacitor units 1301 and multiple adjustable resistor units 1302 can be connected in series or parallel.

[0084] The following combination Figures 3 to 6 Taking the low-noise amplifier as an example, the maximum set capacitance value of the adjustable capacitor unit 1301 and the maximum set resistance value of the adjustable resistor unit 1302 will be explained.

[0085] For example, such as Figures 3 to 6 As shown, at least two impedance adjustment modules include a first impedance adjustment module 131 and a second impedance adjustment module 132. Compared to the second impedance adjustment module 132, the first impedance adjustment module 131 has a connection point closer to the first end of the inductor coil 121, or even the connection point is the first end of the inductor coil 121 itself. Therefore, the inductance value of the inductor coil 121 corresponding to the first impedance adjustment module 131 is greater than the inductance value of the inductor coil 121 corresponding to the second impedance adjustment module 132.

[0086] When the first impedance adjustment module 131 and the second impedance adjustment module 132 adjust the impedance values ​​corresponding to the amplified radio frequency signals of different frequency bands, the impedance formula is applied: z = r + j(xl – xc), where r is resistance, xl is inductive reactance, and xc is capacitive reactance. The impedance value z1 adjusted by the first impedance adjustment module 131 and the impedance value z2 adjusted by the second impedance adjustment module 132 need to be balanced, and the inductive reactance of the first impedance adjustment module 131 is greater than that of the second impedance adjustment module 132.

[0087] Therefore, when both the first impedance adjustment module 131 and the second impedance adjustment module 132 include an adjustable capacitor unit 1301, the impedance r can be ignored. Thus, the maximum set capacitance value of the adjustable capacitor unit 1301 in the first impedance adjustment module 131 is greater than the maximum set capacitance value of the adjustable capacitor unit 1301 in the second impedance adjustment module 132.

[0088] Therefore, when both the first impedance adjustment module 131 and the second impedance adjustment module 132 include an adjustable resistor unit 1302, the capacitive reactance xc can be ignored. Thus, the maximum resistance value of the adjustable resistor unit 1302 in the first impedance adjustment module 131 is less than the maximum set resistance value of the adjustable resistor unit 1302 in the second impedance adjustment module 132.

[0089] Based on this, when both the first impedance adjustment module 131 and the second impedance adjustment module 132 include an adjustable capacitor unit 1301 and an adjustable resistor unit 1302, the maximum set capacitance value of the adjustable capacitor unit 1301 in the first impedance adjustment module 131 is greater than the maximum set capacitance value of the adjustable capacitor unit 1301 in the second impedance adjustment module 132; the maximum resistance value of the adjustable resistor unit 1302 in the first impedance adjustment module 132 is less than the maximum set resistance value of the adjustable resistor unit 1302 in the second impedance adjustment module 132.

[0090] In one embodiment, such as Figure 14 As shown, the low-noise amplifier 110 includes a common-source amplifier 111 and a common-gate amplifier 112. The gate G of the common-source amplifier 111 is used to receive radio frequency signals of different frequency bands. The source S of the common-source amplifier 111 is grounded. The drain D of the common-source amplifier 111 is connected to the source S of the common-gate amplifier 112. The gate G of the common-gate amplifier 112 is connected to a fixed bias. The drain G of the common-gate amplifier 112 serves as the output terminal.

[0091] It should be noted that the common-source amplifier 111 can be an applied field-effect transistor (FET) amplifier, where the input signal is applied between the gate and source, and the output signal is taken from between the drain and source. The common-source amplifier 111 has a high input impedance, which can maintain high signal integrity when processing weak signals. The common-gate amplifier 112 is typically used as a voltage amplifier or current buffer, with the source of its transistor as the input and the drain as the output. The gate amplifier 112 has a low input impedance and a high output impedance, making it suitable as a current-to-current buffer. A switchable capacitor can also be connected between the gate and drain of the common-source amplifier 111 to achieve input impedance matching at different operating frequency bands.

[0092] The low-noise amplifier circuit 100 in the above embodiment modifies the connection method between the inductor and the impedance adjustment module. By setting an external terminal on the inductor and connecting the external terminal to the impedance adjustment module, a new output terminal is formed. This eliminates the need for additional control switches and allows for output impedance matching across different operating frequency bands. Therefore, the number of control switches can be reduced, thereby reducing output insertion loss and improving circuit gain. Simultaneously, the number of inductors is reduced, thus decreasing the layout area.

[0093] Please refer to Figure 15 , Figure 15 This is a circuit diagram of another low-noise amplifier circuit provided in an embodiment of this application.

[0094] like Figure 15 As shown, the low-noise amplifier circuit 200 includes: a low-noise amplifier 210, a first impedance matching circuit 220, and a second impedance matching circuit 230.

[0095] The low-noise amplifier 210 is used to amplify radio frequency signals in different frequency bands.

[0096] The first impedance matching circuit 220 includes a first inductor 221 and at least two first impedance adjustment modules 222. The first end of the first inductor 221 is connected to the low noise amplifier 210, and the second end of the first inductor 221 is connected to the power supply terminal Vdd. The first inductor 221 includes at least one first external terminal, which is located between the first end and the second end of the first inductor 221. The first end of each first impedance adjustment module 222 is connected to the first end or the external terminal of the first inductor 221, and the second end of each first impedance adjustment module 222 is set as the first output terminal.

[0097] The second impedance matching circuit 230 includes a second inductor 231 and at least two second impedance adjustment modules 232. The first end of the second inductor 231 is connected to a low-noise amplifier, and the second end of the second inductor 231 is connected to a power supply terminal. The second inductor 231 includes at least one second external terminal, which is located between the first and second ends of the second inductor 231. The first end of each second impedance adjustment module 232 is connected to either the first end or the external terminal of the second inductor 231, and the second end of each second impedance adjustment module 232 is configured as a second output terminal.

[0098] It should be noted that the first impedance matching circuit 220 and the second impedance matching circuit 230 can form a dual circuit structure, which can realize more frequency bands of output, further improve its application range, reduce the number of switches in the circuit, and improve the gain.

[0099] In one embodiment, the first ends of at least two first impedance adjustment modules 222 can be connected to different external terminals of the first inductor coil 221, or one of the at least two first impedance adjustment modules 222 can be connected to the first end of the first inductor coil 221, while the other first impedance adjustment modules 222 can be connected to different external terminals of the first inductor coil 221. Similarly, the first ends of at least two second impedance adjustment modules 232 can be connected to different external terminals of the second inductor coil 231, or one of the at least two second impedance adjustment modules 232 can be connected to the first end of the second inductor coil 231, while the other second impedance adjustment modules 232 can be connected to different external terminals of the second inductor coil 231.

[0100] It should be noted that a switching unit can also be set between the power supply terminal Vdd and the second terminals of the first inductor 221 and the second inductor 231 to control the on / off state of the power supply. Since this low-noise amplifier circuit 200 has multiple output terminals, impedance adjustment is required for each output terminal. This can be achieved through the adjustment functions of at least two first impedance adjustment modules 222 and the second impedance adjustment module 232, satisfying the output requirements of different terminals. Based on this, by combining the corresponding connected inductors and the adjustment functions of each impedance adjustment module, the control switches for multiple output terminals can be eliminated simultaneously, and the number of inductors can be reduced.

[0101] It should be noted that the specific circuit structure of the low-noise amplifier circuit 200 in the above embodiment, such as the related structure and connection method of at least two first impedance adjustment modules 222 and at least two second impedance adjustment modules 232, can be referred to the corresponding implementation in the aforementioned low-noise amplifier circuit 100. This application embodiment will not repeat the details.

[0102] It should be noted that the specific implementation of the low-noise amplifier circuit 200 described above can refer to the corresponding implementation of the low-noise amplifier circuit 100 in the foregoing embodiments, and will not be repeated here.

[0103] The low-noise amplifier circuit 200 of the above embodiment changes the connection method between the first inductor 221 and at least two first impedance adjustment modules 222, and also changes the connection method between the second inductor 231 and at least two second impedance adjustment modules 232. By providing at least one external terminal on the first inductor 221 and the second inductor 231, and connecting the external terminal to the first impedance adjustment module 222 or the second impedance adjustment module 232, a new output terminal is formed. No additional control switch is required, and output impedance matching under different operating frequency bands can be achieved. Therefore, the number of control switches can be reduced, thereby reducing output insertion loss and improving circuit gain. Simultaneously, the number of inductors is reduced, thereby reducing the layout area.

[0104] Please refer to Figure 16 , Figure 16 This is a circuit diagram of another low-noise amplifier circuit provided in an embodiment of this application.

[0105] like Figure 16 As shown, the low-noise amplifier circuit 300 includes: a low-noise amplifier 310, at least one inductor coil 320, and at least two impedance adjustment modules.

[0106] The system includes a low-noise amplifier 310 for amplifying radio frequency signals of different frequency bands; at least one inductor 320, with its first end connected to the low-noise amplifier 310 and its second end connected to a power supply terminal Vdd; the inductor 320 is configured as a multi-turn spiral structure, the spiral structure including at least one external terminal (e.g., terminal a), dividing the spiral structure of the inductor 320 into at least two segments using at least one external terminal (e.g., terminal a) as a dividing point; and at least two impedance adjustment modules 330, with their first ends connected to either the first end of the inductor 320 or the external terminal (e.g., terminal a), respectively, and their second ends configured as output terminals.

[0107] It should be noted that when there are multiple inductors 320, they are connected in parallel. For example, the first ends of multiple inductors 320 are all connected to the low-noise amplifier 310, and the second ends of multiple inductors 320 are all connected to the power supply terminal Vdd. By setting external terminals (such as terminal a) on the inductors 320 and connecting the external terminals to the impedance adjustment module 330 to form new output terminals, output impedance matching under different operating frequency bands can be achieved. Furthermore, no additional control switches are needed to control each output terminal, thus reducing the number of control switches, thereby reducing the output insertion loss of the low-noise amplifier circuit 300 and improving the gain of the low-noise amplifier circuit 300. Simultaneously, by reducing the number of inductors, the layout area of ​​the low-noise amplifier circuit 300 can be reduced.

[0108] For example, at least one external end is located in the middle of the surrounding structure.

[0109] For example, at least one external terminal is located at a quarter position of the surrounding structure.

[0110] In one example, the inductor 320 may also include multiple external terminals located at different positions on the surrounding structure.

[0111] In one example, the winding structure of the inductor 320 is divided into at least two segments, with at least one external terminal of the inductor 320 as the dividing point, and the trace length and / or trace width of each segment of the winding structure are different.

[0112] In one example, the inductor coil 320 has one external terminal. The first terminal to the external terminal of the inductor coil 320 is used as the first winding structure, and the external terminal to the second terminal of the inductor coil 320 is used as the second winding structure. The first winding structure and the second winding structure have different trace lengths and different trace widths.

[0113] In one example, the inductor coil 320 has two external terminals, one of which is located at the one-quarter position of the surrounding structure, and the other is located at the three-quarter position of the surrounding structure.

[0114] It should be noted that the specific implementation of the low-noise amplifier circuit 300 can refer to the corresponding implementation of the low-noise amplifier circuit 100 or low-noise amplifier circuit 200 in the foregoing embodiments. The beneficial effects that the low-noise amplifier circuit 300 can achieve can refer to the beneficial effects of the low-noise amplifier circuit 100 or low-noise amplifier circuit 200 provided above, and will not be repeated here.

[0115] Please refer to Figure 17 , Figure 17 This is a schematic block diagram of a radio frequency front-end module provided in an embodiment of this application.

[0116] like Figure 17 As shown, the RF front-end module 400 includes a low-noise amplifier circuit 410. The low-noise amplifier circuit 410 can be the low-noise amplifier circuit 100, the low-noise amplifier circuit 200, or the low-noise amplifier circuit 300 described in the above embodiments.

[0117] It is understood that the beneficial effects that the RF front-end module provided in this application embodiment can achieve can be referred to the beneficial effects of the low-noise amplifier circuit in the corresponding embodiment provided above, and will not be repeated here.

[0118] It should be noted that an RF front-end module is a component that integrates two or more discrete devices, such as RF switches, low-noise amplifiers, filters, duplexers, power amplifiers, and transformers, into a single independent module. This improves the integration and hardware performance of the RF front-end module and reduces its size. Specifically, RF front-end modules can be used in 4G and 5G communication devices such as smartphones, tablets, and smartwatches.

[0119] With the development of information technology, 5G technology and 5G equipment place higher demands on the performance of radio frequency (RF) front-end modules. The technical solution provided in this application offers a low-noise amplifier circuit and an RF front-end module that reduces the number of control switches in the low-noise amplifier circuit, thereby reducing output insertion loss and improving circuit gain. This better meets the requirements of 5G technology and can therefore be applied to 5G equipment.

[0120] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A low-noise amplifier circuit, characterized in that, include: Low-noise amplifiers are used to amplify radio frequency signals in different frequency bands; At least one inductor, a first end of which is connected to the low-noise amplifier, and a second end of which is used to connect to a power supply terminal; the inductor also includes at least one external terminal located between the first and second ends of the inductor. At least two impedance adjustment modules are provided, with the first end of each impedance adjustment module connected to the first end of the inductor coil or the external terminal, and the second end of each impedance adjustment module being configured as an output terminal.

2. The low-noise amplifier circuit according to claim 1, characterized in that, Each of the impedance adjustment modules includes an adjustable capacitor unit and / or an adjustable resistor unit; The adjustable capacitor unit is configured to adjust the impedance within a set capacitance value range; The adjustable resistor unit is configured to adjust the impedance within a set resistance value range.

3. The low-noise amplifier circuit according to claim 2, characterized in that, The adjustable capacitor unit includes a plurality of cascaded first branches, each of which includes at least a first switch and a first capacitor connected in series.

4. The low-noise amplifier circuit according to any one of claims 2 or 3, characterized in that, The adjustable resistor unit includes a plurality of cascaded second branches, each of which includes at least a second switch and an attenuator connected in series or in parallel.

5. The low-noise amplifier circuit according to any one of claims 2 or 3, characterized in that, The adjustable resistor unit includes a pi attenuator or a T-type attenuator.

6. The low-noise amplifier circuit according to claim 1, characterized in that, The inductor coil is configured as a multi-turn winding structure.

7. The low-noise amplifier circuit according to claim 6, characterized in that, At least one of the external terminals is located at the center of the surrounding structure; or The multiple external terminals are located at different positions in the surrounding structure.

8. The low-noise amplifier circuit according to any one of claims 6 or 7, characterized in that, Using at least one of the external terminals of the inductor coil as a dividing point, the winding structure of the inductor coil is divided into at least two segments, and the trace lengths and / or trace widths of the at least two segments of the winding structure are different.

9. The low-noise amplifier circuit according to claim 8, characterized in that, The external terminal is one. The first end of the inductor coil to the external terminal is used as the second segment of the winding structure, and the external terminal to the second end of the inductor coil is used as the first segment of the winding structure. The first segment of the winding structure and the second segment of the winding structure have different trace lengths and different trace widths.

10. The low-noise amplifier circuit according to any one of claims 6 or 7, characterized in that, There are two external terminals, one of which is located at one-quarter position of the surrounding structure, and the other is located at three-quarter position of the surrounding structure.

11. The low-noise amplifier circuit according to any one of claims 6 or 7, characterized in that, The inductor coil includes a surrounding center, and the spacing between adjacent first traces is greater than the spacing between adjacent second traces; the first traces are traces in the surrounding structure that are far from the surrounding center, and the second traces are traces in the surrounding structure that are close to the surrounding center.

12. The low-noise amplifier circuit according to claim 1, characterized in that, The at least one inductor includes a first inductor, the first inductor including a first external terminal; the at least two impedance adjustment modules include a first impedance adjustment module and a second impedance adjustment module. The first impedance adjustment module is connected to the first end of the first inductor coil, and the second impedance adjustment module is connected to the first external terminal.

13. The low-noise amplifier circuit according to claim 12, characterized in that, The first impedance adjustment module connected to the first end of the first inductor coil is used to output a first frequency band radio frequency signal, and the second impedance adjustment module connected to the first external terminal is used to output a second frequency band radio frequency signal. The frequency of the first frequency band radio frequency signal is less than the frequency of the second frequency band radio frequency signal.

14. The low-noise amplifier circuit according to claim 1, characterized in that, The at least one inductor includes a first inductor, the first inductor having a first external terminal and a second external terminal, the first external terminal being closer to a first end of the first inductor than the second external terminal; the at least two impedance adjustment modules include a first impedance adjustment module and a second impedance adjustment module. The first impedance adjustment module is connected to the first external terminal, and the second impedance adjustment module is connected to the second external terminal.

15. The low-noise amplifier circuit according to claim 1, characterized in that, The at least one inductor includes a first inductor, the first inductor having a first external terminal and a second external terminal, the first external terminal being closer to a first end of the first inductor than the second external terminal; the at least two impedance adjustment modules include a first impedance adjustment module, a second impedance adjustment module, and a third impedance adjustment module; The first impedance adjustment module is connected to the first end of the first inductor coil, the second impedance adjustment module is connected to the first external terminal, and the third impedance adjustment module is connected to the second external terminal.

16. The low-noise amplifier circuit according to claim 1, characterized in that, The at least one inductor includes a first inductor and a second inductor. The first ends of the first inductor and the second inductor are connected to the low-noise amplifier, and the second ends of the first inductor and the second inductor are used to connect to the power supply terminal. The first inductor includes a first external terminal, and the second inductor includes a second external terminal. The at least two impedance adjustment modules include a first impedance adjustment module, a second impedance adjustment module, a third impedance adjustment module, and a fourth impedance adjustment module; The first impedance adjustment module is connected to the first end of the first inductor coil, and the second impedance adjustment module is connected to the first external terminal; The third impedance adjustment module is connected to the first end of the second inductor coil, and the fourth impedance adjustment module is connected to the second external terminal.

17. The low-noise amplifier circuit according to any one of claims 12 to 16, characterized in that, The maximum set capacitance value of the adjustable capacitor unit in the first impedance adjustment module is greater than the maximum set capacitance value of the adjustable capacitor unit in the second impedance adjustment module; and / or The maximum resistance value of the adjustable resistor unit in the first impedance adjustment module is less than the maximum set resistance value of the adjustable resistor unit in the second impedance adjustment module.

18. The low-noise amplifier circuit according to any one of claims 1-3, characterized in that, The low-noise amplifier includes a common-source amplifier and a common-gate amplifier; The gate of the common-source amplifier is used to receive radio frequency signals of different frequency bands. The source of the common-source amplifier is grounded. The drain of the common-source amplifier is connected to the source of the common-gate amplifier. The gate of the common-gate amplifier is fixedly biased. The drain of the common-gate amplifier serves as the output terminal.

19. A low-noise amplifier circuit, characterized in that, include: Low-noise amplifiers are used to amplify radio frequency signals in different frequency bands; A first impedance matching circuit includes a first inductor and at least two first impedance adjustment modules. A first end of the first inductor is connected to the low-noise amplifier, and a second end of each of the first inductors is connected to a power supply terminal. The first inductor includes at least one first external terminal located between the first and second ends of the first inductor. The first end of each first impedance adjustment module is connected to either the first end of the first inductor or the external terminal, and the second end of each first impedance adjustment module is configured as a first output terminal. The second impedance matching circuit includes a second inductor and at least two second impedance adjustment modules. The first end of the second inductor is connected to the low-noise amplifier, and the second end of the second inductor is connected to the power supply terminal. The second inductor includes at least one second external terminal, which is located between the first and second ends of the second inductor. The first end of each second impedance adjustment module is connected to either the first end of the second inductor or the external terminal, and the second end of each second impedance adjustment module is configured as a second output terminal.

20. The low-noise amplifier circuit according to claim 19, characterized in that, Both the first impedance adjustment module and the second impedance adjustment module include an adjustable capacitor unit and / or an adjustable resistor unit; The adjustable capacitor unit is configured to adjust the impedance within a set capacitance value range; The adjustable resistor unit is configured to adjust the impedance within a set resistance value range.

21. A low-noise amplifier circuit, characterized in that, include: Low-noise amplifiers are used to amplify radio frequency signals in different frequency bands; At least one inductor, a first end of which is connected to the low-noise amplifier, and a second end of which is used to connect to a power supply terminal; the inductor is configured as a multi-turn winding structure, the winding structure including at least one external terminal, the winding structure of the inductor being divided into at least two segments with the at least one external terminal of the inductor as a dividing point; At least two impedance adjustment modules are provided, with the first end of each impedance adjustment module connected to the first end of the inductor coil or the external terminal, and the second end of each impedance adjustment module being configured as an output terminal.

22. A radio frequency front-end module, characterized in that, Including the low-noise amplifier circuit as described in any one of claims 1-21.

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