Amplifier

Abstract

The utility model discloses an amplifier, relates to amplifier field, interstage reconfigurable matching module and output reconfigurable matching module both include ground ring and a plurality of switches, ground ring is connected with its own first end of a plurality of switches respectively, the second end of a plurality of switches all ground; the output end of the driving stage amplification module is connected with the input end of the inter-stage reconfigurable matching module; the output end of the inter-stage reconfigurable matching module is connected with the input end of the power stage amplification module; the output end of the power level amplification module is connected with the input end of the output reconfigurable matching module. Therefore, according to the invention, the inductance value of the inter-stage reconfigurable matching module is changed by simultaneously opening or closing the plurality of switches of the inter-stage reconfigurable matching module, and the inductance value of the output reconfigurable matching module is changed by simultaneously opening or closing the plurality of switches of the output reconfigurable matching module, so that the frequency band of the amplifier is switched to the target frequency band; and the multi-frequency-band requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of amplifiers, and in particular to an amplifier. Background Technology

[0002] With the rapid development of wireless communication technology and the continuous maturation of CMOS (Complementary Metal-Oxide Semiconductor) technology, 5G millimeter-wave phased array technology has received increasing attention. The low-noise amplifier (LNOA) is the first-stage active amplifier circuit in a phased array multi-functional receiver, significantly impacting the bandwidth, gain, sensitivity, and noise figure of the entire receiver chip. Currently, existing LNOA systems are typically optimized for specific frequency bands, limiting their operating frequency and making it difficult to meet the multi-band requirements of modern communication systems (such as 5G and satellite communications). Utility Model Content

[0003] The purpose of this invention is to provide an amplifier that can change the inductance value of the interstage reconfigurable matching module by simultaneously opening or closing two switches of the output reconfigurable matching module, and change the inductance value of the output reconfigurable matching module by simultaneously opening or closing two switches of the output reconfigurable matching module, thereby switching the amplifier's frequency band to the target frequency band and meeting the needs of multiple frequency bands.

[0004] To solve the above technical problems, this utility model provides an amplifier, including a driver stage amplification module, an interstage reconfigurable matching module, a power stage amplification module, and an output reconfigurable matching module; wherein, the interstage reconfigurable matching module and the output reconfigurable matching module each include a ground ring and multiple switches, the ground ring is connected to the first terminal of the multiple switches corresponding to it, and the second terminal of the multiple switches is grounded;

[0005] The input terminal of the driver stage amplifier module serves as the input terminal of the amplifier and is connected to the radio frequency signal. The output terminal of the driver stage amplifier module is connected to the input terminal of the inter-stage reconfigurable matching module.

[0006] The output of the interstage reconfigurable matching module is connected to the input of the power stage amplification module;

[0007] The output terminal of the power stage amplification module is connected to the input terminal of the output reconfigurable matching module;

[0008] The output terminal of the output reconfigurable matching module serves as the output terminal of the amplifier.

[0009] Optionally, it also includes a DC blocking capacitor, the first end of which serves as the input terminal of the amplifier and is connected to the radio frequency signal, and the second end of which is connected to the input terminal of the driver stage amplification module.

[0010] Optionally, the input terminals of the power stage amplification module include a first RF input terminal and a second RF input terminal, the output terminals of the power stage amplification module include a DC output terminal, and the interstage reconfigurable matching module includes a reconfigurable interstage transformer, a first variable capacitor, and a second variable capacitor; wherein, the reconfigurable interstage transformer includes a first inductor, a second inductor, a first ground loop, a first switching transistor, and a second switching transistor;

[0011] The first terminal of the first inductor and the first terminal of the first variable capacitor are connected to the output terminal of the driver stage amplifier module, and the second terminal of the first inductor is connected to the DC output terminal of the power stage amplifier module; wherein, the first terminal of the first inductor is the same-name terminal of the first inductor.

[0012] The second terminal of the first variable capacitor is grounded;

[0013] The first end of the second inductor and the first end of the second variable capacitor are connected to the first RF input terminal of the power stage amplifier module, and the second end of the second inductor is connected to the second RF input terminal of the power stage amplifier module and the second end of the second variable capacitor; wherein, the first end of the second inductor is the same-name terminal of the second inductor.

[0014] Optionally, the output terminal of the power stage amplifier module further includes a positive output terminal and a negative output terminal, the input terminal of the output reconfigurable matching module includes a positive input terminal and a negative input terminal, and the power stage amplifier module includes a first MOSFET, a second MOSFET, a third MOSFET, and a fourth MOSFET;

[0015] The gate of the first MOS transistor is connected to the first terminal of the second inductor and the first terminal of the second variable capacitor as the first RF input terminal of the power stage amplifier module. The drain of the first MOS transistor is connected to the source of the second MOS transistor. The source of the first MOS transistor and the source of the third MOS transistor are connected to the second terminal of the first inductor as the DC output terminal of the power stage amplifier module.

[0016] The gate of the second MOS transistor is grounded, and the drain of the second MOS transistor is connected to the positive input terminal of the power stage amplifier module as the positive output terminal of the output reconfigurable matching module.

[0017] The gate of the third MOS transistor is connected to the second terminal of the first inductor and the second terminal of the second variable capacitor as the second RF input terminal of the power stage amplifier module. The drain of the third MOS transistor is connected to the source of the fourth MOS transistor.

[0018] The gate of the fourth MOS transistor is grounded, and the drain of the fourth MOS transistor is connected to the negative input terminal of the power stage amplification module as the negative output terminal of the output reconfigurable matching module.

[0019] Optionally, the power stage amplification module further includes a current multiplexing module, which includes a first bypass capacitor and a second bypass capacitor. The first terminal of the first bypass capacitor and the first terminal of the second bypass capacitor are both connected to the source of the first MOSFET, the source of the third MOSFET, and the second terminal of the first inductor. The second terminals of the first bypass capacitor and the second terminal of the second bypass capacitor are both grounded.

[0020] Optionally, the output terminals of the power stage amplification module include a positive output terminal and a negative output terminal, the output terminals of the output reconfigurable matching module include a positive output terminal and a negative output terminal, and the output reconfigurable matching module includes a reconfigurable output transformer, a third variable capacitor, and a fourth variable capacitor; wherein, the reconfigurable output transformer includes a third inductor, a fourth inductor, a second ground ring, a third switching transistor, and a fourth switching transistor;

[0021] The first terminal of the third inductor and the first terminal of the third variable capacitor are connected to the positive output terminal of the power stage amplification module, and the second terminal of the third inductor and the second terminal of the third variable capacitor are connected to the negative output terminal of the power stage amplification module; wherein, the third inductor is also connected to the power supply voltage, and the first terminal of the third inductor is the same-name terminal of the third inductor;

[0022] The first terminal of the fourth inductor and the first terminal of the fourth variable capacitor serve as the positive output terminal of the output reconfigurable matching module, and the second terminal of the fourth inductor and the second terminal of the fourth variable capacitor serve as the negative output terminal of the output reconfigurable matching module; wherein, the first terminal of the fourth inductor is the same-name terminal of the fourth inductor.

[0023] Optionally, it also includes a wideband input matching module, the input terminal of which is connected to the second terminal of the DC blocking capacitor, and the output terminal of which is connected to the input terminal of the driver stage amplification module.

[0024] Optionally, the driver stage amplification module is a fifth MOS transistor, and the wideband input matching module includes a fifth inductor and a sixth inductor;

[0025] The first terminal of the fifth inductor is connected to the second terminal of the DC blocking capacitor and the gate of the fifth MOS transistor, and the second terminal of the fifth inductor is grounded; wherein, the first terminal of the fifth inductor is the same-name terminal of the fifth inductor;

[0026] The first terminal of the sixth inductor is connected to the source of the fifth MOS transistor, and the second terminal of the sixth inductor is grounded; wherein, the second terminal of the sixth inductor is the same-name terminal of the sixth inductor.

[0027] Optionally, the wideband input matching module further includes a seventh inductor, the first end of which is connected to the second end of the DC blocking capacitor and the first end of the fifth inductor, and the second end of which is connected to the gate of the fifth MOS transistor.

[0028] Optionally, the broadband input matching module further includes a microstrip line, the first end of which is connected to the second end of the DC blocking capacitor and the first end of the fifth inductor, and the second end of which is connected to the gate of the fifth MOS transistor.

[0029] This application provides an amplifier comprising a driver stage amplification module, an interstage reconfigurable matching module, a power stage amplification module, and an output reconfigurable matching module. Both the interstage and output reconfigurable matching modules include a ground loop and multiple switches. The ground loop is connected to the first terminals of each of the corresponding switches, and the second terminals of all switches are grounded. The input terminal of the driver stage amplification module serves as the amplifier's input terminal, receiving an RF signal. The output terminal of the driver stage amplification module is connected to the input terminal of the interstage reconfigurable matching module. The output terminal of the interstage reconfigurable matching module is connected to the input terminal of the power stage amplification module. The output terminal of the power stage amplification module is connected to the input terminal of the output reconfigurable matching module. The output terminal of the output reconfigurable matching module serves as the amplifier's output terminal. Therefore, this application achieves frequency band switching to a target frequency band by simultaneously opening or closing multiple switches of the interstage reconfigurable matching module to change its inductance value, and by simultaneously opening or closing multiple switches of the output reconfigurable matching module to change its inductance value, thus meeting the requirements of multi-band operation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an amplifier disclosed in this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the first specific amplifier disclosed in this utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the second specific amplifier disclosed in this utility model;

[0034] Figure 4 This is a schematic diagram of the structure of a reconfigurable interstage transformer disclosed in this utility model;

[0035] Figure 5 This is a schematic diagram of the structure of a reconfigurable output transformer disclosed in this utility model;

[0036] The reference numerals in the attached diagram are as follows: 1 is the driver stage amplification module, 2 is the interstage reconfigurable matching module, 3 is the power stage amplification module, 4 is the output reconfigurable matching module, 5 is the reconfigurable interstage transformer, 6 is the first variable capacitor, 7 is the second variable capacitor, 8 is the first ground loop, 9 is the reconfigurable output transformer, 10 is the third variable capacitor, 11 is the fourth variable capacitor, and 12 is the second ground loop. Detailed Implementation

[0037] The core of this invention is to provide an amplifier that can change the inductance value of the interstage reconfigurable matching module by simultaneously opening or closing two switches of the output reconfigurable matching module, and change the inductance value of the output reconfigurable matching module by simultaneously opening or closing two switches of the output reconfigurable matching module, thereby switching the amplifier's frequency band to the target frequency band and meeting the needs of multiple frequency bands.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] To solve the above-mentioned technical problems, this utility model provides an amplifier.

[0040] For details, please see Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an amplifier disclosed in this utility model.

[0041] The amplifier includes a driver stage amplification module 1, an interstage reconfigurable matching module 2, a power stage amplification module 3, and an output reconfigurable matching module 4. Both the interstage reconfigurable matching module 2 and the output reconfigurable matching module 4 include a ground ring and multiple switches. The ground ring is connected to the first terminal of each of the corresponding switches, and the second terminals of all switches are grounded. The input terminal of the driver stage amplification module 1 serves as the input terminal of the amplifier, receiving an RF signal. The output terminal of the driver stage amplification module 1 is connected to the input terminal of the interstage reconfigurable matching module 2. The output terminal of the interstage reconfigurable matching module 2 is connected to the input terminal of the power stage amplification module 3. The output terminal of the power stage amplification module 3 is connected to the input terminal of the output reconfigurable matching module 4. The output terminal of the output reconfigurable matching module 4 serves as the output terminal of the amplifier.

[0042] In this embodiment, simultaneously opening or closing multiple switches of the interstage reconfigurable matching module 2 can change the inductance value of the interstage reconfigurable matching module 2. Similarly, simultaneously opening or closing multiple switches of the output reconfigurable matching module 4 can change the inductance value of the output reconfigurable matching module 4. Both the inductance values ​​of the interstage reconfigurable matching module 2 and the output reconfigurable matching module 4 are positively correlated with the frequency band. Therefore, the changes in the inductance values ​​of the interstage reconfigurable matching module 2 and the output reconfigurable matching module 4 can be used to switch the amplifier to the target frequency band.

[0043] Specifically, the interstage reconfigurable matching module 2 also includes a first inductor and a second inductor. When multiple switches of the interstage reconfigurable matching module 2 are closed simultaneously, the ground loop and ground of the interstage reconfigurable matching module 2 are connected as one unit, and the mutual inductance between the first and second inductors and ground increases, thus increasing the frequency band of the interstage reconfigurable matching module 2. When multiple switches of the interstage reconfigurable matching module 2 are open simultaneously, the ground loop and ground of the interstage reconfigurable matching module 2 are divided into two parts, the distance between the first and second inductors and ground increases, the mutual inductance between the first and second inductors and ground decreases, and the inductance increases relative to when the switches are closed, thus increasing the frequency band of the interstage reconfigurable matching module 2. The output reconfigurable matching module 4 also includes a third inductor and a fourth inductor. When multiple switches of the output reconfigurable matching module 4 are closed simultaneously, the ground loop and ground of the output reconfigurable matching module 4 are connected as one unit, the mutual inductance between the third inductor and the fourth inductor and ground increases, and the frequency band of the reconfigurable matching module is increased. When multiple switches of the output reconfigurable matching module 4 are open simultaneously, the ground loop and ground of the output reconfigurable matching module 4 are divided into two parts, the distance between the third inductor and the fourth inductor and ground increases, the mutual inductance between the third inductor and the fourth inductor and ground decreases, the inductance is increased relative to when the switch is closed, and the frequency band of the output reconfigurable matching module 4 is reduced.

[0044] As can be seen, this application changes the inductance value of the interstage reconfigurable matching module 2 by simultaneously opening or closing the two switches of the interstage reconfigurable matching module 2, and changes the inductance value of the output reconfigurable matching module 4 by simultaneously opening or closing the two switches of the output reconfigurable matching module 4, thereby switching the amplifier's frequency band to the target frequency band and meeting the multi-band requirements.

[0045] Based on the above embodiments:

[0046] Please participate Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, Figure 2 This is a schematic diagram of the structure of the first specific amplifier disclosed in this utility model. Figure 3 This is a schematic diagram of the structure of the second specific amplifier disclosed in this utility model. Figure 4 This is a schematic diagram of the structure of a reconfigurable interstage transformer disclosed in this utility model. Figure 5 This is a schematic diagram of the structure of a reconfigurable output transformer disclosed in this utility model.

[0047] As an optional embodiment, it also includes a DC blocking capacitor C1, with the first end of the DC blocking capacitor serving as the input terminal of the amplifier and connected to the radio frequency signal, and the second end of the DC blocking capacitor connected to the input terminal of the driver stage amplifier module 1.

[0048] In this embodiment, the DC blocking capacitor C1, through its "DC blocking and AC passing" characteristic, prevents the DC bias of the front-end circuit from affecting the operating point of the subsequent amplifier module, while only allowing AC signals, such as radio frequency signals, to pass through without loss, thus ensuring signal integrity.

[0049] As can be seen, this application achieves efficient DC isolation and RF transmission at low cost through the DC blocking capacitor C1, ensuring the normal operation of the amplifier.

[0050] As an optional embodiment, the input terminals of the power stage amplifier module 3 include a first RF input terminal and a second RF input terminal, and the output terminal of the power stage amplifier module 3 includes a DC output terminal. The interstage reconfigurable matching module 2 includes a reconfigurable interstage transformer 5, a first variable capacitor 6, and a second variable capacitor 7. The reconfigurable interstage transformer 5 includes a first inductor L1, a second inductor L2, a first ground ring 8, a first switch M1, and a second switch M2. The first terminal of the first inductor L1 and the first terminal of the first variable capacitor 6 are connected to the output terminal of the drive stage amplifier module 1, and the second terminal of the first inductor L1 is connected to the DC output terminal of the power stage amplifier module 3. The first terminal of the first inductor L1 is the same-name terminal of the first inductor L1. The second terminal of the first variable capacitor 6 is grounded. The first terminal of the second inductor L2 and the first terminal of the second variable capacitor 7 are connected to the first RF input terminal of the power stage amplifier module 3, and the second terminal of the second inductor L2 is connected to the second RF input terminal of the power stage amplifier module 3 and the second terminal of the second variable capacitor 7. The first terminal of the second inductor L2 is the same-name terminal of the second inductor L2.

[0051] Specifically, when the first switch M1 and the second switch M2 are closed simultaneously, the first ground loop 8 and ground are connected as one unit. This means the primary and secondary coils are closer to ground, resulting in a smaller gap between the primary and secondary coils and ground. The mutual inductance between the primary and secondary coils and ground increases, leading to a decrease in the inductance of the primary and secondary coils, especially those closer to the ground loop. This results in a higher frequency band through the interstage reconfigurable matching module 2. When the first switch M1 and the second switch M2 are open, the ground loop and ground are separated into two parts. This means the primary and secondary coils are farther from ground, resulting in a larger gap between the primary and secondary coils and ground. The mutual inductance between the primary and secondary coils and ground decreases, resulting in a larger inductance of the primary and secondary coils compared to when the first switch M1 and the second switch M2 are closed simultaneously. This results in a lower frequency band through the interstage reconfigurable matching module 2. It should be noted that the first inductor L1 is the primary coil, and the second inductor L2 is the secondary coil.

[0052] Considering that when two frequency bands are significantly different, simply changing the inductor value is insufficient to effectively switch the amplifier to the target frequency band. Therefore, it is necessary to use auxiliary methods to change the capacitance values ​​of the first variable capacitor 6 and the second variable capacitor 7 to achieve frequency band switching. Specifically, the first variable capacitor 6 may include a first capacitor C2 and a fifth switch M5. The first terminal of the first capacitor C2 and the first terminal of the first inductor L1 are connected to the output terminal of the driver stage amplifier module 1. The second terminal of the first capacitor C2 is connected to the first terminal of the fifth switch M5, and the second terminal of the fifth switch M5 is grounded. The second variable capacitor 7 may include a second capacitor C3 and a sixth switch M6. The first terminal of the second capacitor C3 and the first terminal of the second inductor L2 are connected to the first RF input terminal of the power stage amplifier module 3. The second terminal of the second capacitor C3 is connected to the first terminal of the sixth switch M6. The second terminal of the sixth switch M6 and the second terminal of the second inductor L2 are connected to the second RF input terminal of the power stage amplifier module 3. When the fifth switch M5 and the sixth switch M6 are closed, the switch is equivalent to a small resistor. At this time, the equivalent capacitance of the switch and the corresponding capacitor is equal to the capacitance of the corresponding capacitor itself. When the fifth switch M5 and the sixth switch M6 are open, the switch is equivalent to a parasitic capacitor. Since the capacitance of the parasitic capacitor is less than the capacitance of the corresponding capacitor itself, the equivalent capacitance is less than the capacitance of the corresponding capacitor itself, which is reduced by the frequency band of the interstage reconfigurable matching module 2.

[0053] As can be seen, this embodiment can change the inductance value of the interstage reconfigurable matching module 2 by simultaneously opening or closing the first switch M1 and the second switch M2 to achieve frequency band switching. At the same time, when the two frequency bands are far apart, frequency band switching can be achieved by changing the capacitance values ​​of the first variable capacitor 6 and the second variable capacitor 7, thereby switching the amplifier's frequency band to the target frequency band.

[0054] As an optional embodiment, the output terminal of the power stage amplifier module 3 includes a positive output terminal and a negative output terminal, and the input terminal of the output reconfigurable matching module 4 includes a positive input terminal and a negative input terminal. The power stage amplifier module 3 includes a first MOS (Metal-Oxide-Semiconductor) transistor M9, a second MOS transistor M10, a third MOS transistor M11, and a fourth MOS transistor M12. The gate of the first MOS transistor M9 serves as the first RF input terminal of the power stage amplifier module 3 and is connected to the first terminal of the second inductor L2 and the first terminal of the second variable capacitor 7. The drain of the first MOS transistor M9 is connected to the source of the second MOS transistor M10. The source of the first MOS transistor M9 and the third MOS transistor M12 are connected to the source of the second MOS transistor M10. The source of MOSFET M11 is connected to the second terminal of the first inductor L1 as the DC output terminal of the power stage amplifier module 3; the gate of the second MOSFET M10 is grounded, and the drain of the second MOSFET M10 is connected to the positive input terminal of the output reconfigurable matching module 4 as the positive output terminal of the power stage amplifier module 3; the gate of the third MOSFET M11 is connected to the second terminal of the first inductor L1 and the second terminal of the second variable capacitor 7 as the second RF input terminal of the power stage amplifier module 3, and the drain of the third MOSFET M11 is connected to the source of the fourth MOSFET M12; the gate of the fourth MOSFET M12 is grounded, and the drain of the fourth MOSFET M12 is connected to the negative input terminal of the output reconfigurable matching module 4 as the negative output terminal of the power stage amplifier module 3.

[0055] Among them, the first MOSFET M9, the second MOSFET M10, the third MOSFET M11, and the fourth MOSFET M12 all adopt CMOS-SOI (Complementary Metal-Oxide Semiconductor on Insulator) technology. The CMOS-SOI technology significantly improves the high-frequency, power consumption, and reliability performance of MOSFETs through parasitic parameter optimization and isolation characteristics, making it an ideal choice for RF, millimeter-wave, and high-speed digital circuits. The first MOSFET M9 and the second MOSFET M10 form a cascode structure, and the third MOSFET M11 and the fourth MOSFET M12 form a cascode structure.

[0056] As can be seen, this embodiment utilizes the first MOSFET M9, the second MOSFET M10, the third MOSFET M11, and the fourth MOSFET M12 as the power stage amplification module 3, which ensures the reliability of the amplifier while achieving power amplification.

[0057] As an optional embodiment, the power stage amplification module 3 further includes a current multiplexing module. The first terminal of the current multiplexing module is connected to the source of the first MOSFET M9, the source of the third MOSFET M11, and the second terminal of the first inductor L1. The second terminal of the current multiplexing module is grounded.

[0058] This embodiment includes a current multiplexing module, which shares the current of the amplification stage with the driver stage amplification module 1 through the interstage transformer, thereby reducing amplifier losses.

[0059] Specifically, the current multiplexing module may include a first bypass capacitor C4 and a second bypass capacitor C5. The first terminal of the first bypass capacitor C4 and the first terminal of the second bypass capacitor C5 are both connected to the source of the first MOSFET M9, the source of the third MOSFET M11, and the second terminal of the first inductor L1. The second terminal of the first bypass capacitor C4 and the second terminal of the second bypass capacitor C5 are both grounded.

[0060] In addition, the power stage amplifier module 3 also includes a first gate voltage divider capacitor C6, a second gate voltage divider capacitor C7, a first feedback capacitor C8, a second feedback capacitor C9, a first feedback resistor R1, and a second feedback resistor R2. The first terminal of the first gate voltage divider capacitor C6 is connected to the gate of the second MOSFET M10, and the second terminal of the first gate voltage divider capacitor C6 is grounded. The first terminal of the second gate voltage divider capacitor C7 is connected to the gate of the fourth MOSFET M12, and the second terminal of the second gate voltage divider capacitor C7 is grounded. The first terminal of the first feedback capacitor C8 and the gate of the first MOSFET M9 serve as the first RF input terminal of the power stage amplifier module 3, connected to the first terminal of the second inductor L2 and the first terminal of the second variable capacitor 7. The second terminal of the first feedback capacitor C8 is connected to the first terminal of the first feedback resistor R1. The second terminal of the first feedback resistor R1... The first terminal of the second feedback capacitor C9 and the drain of the second MOSFET M10 are connected to the positive input terminal of the output reconfigurable matching module 4 as the positive output terminal of the power stage amplifier module 3; the first terminal of the second feedback capacitor C9 and the gate of the third MOSFET M11 are connected to the second terminal of the first inductor L1 and the second terminal of the second variable capacitor 7 as the second RF input terminal of the power stage amplifier module 3; the second terminal of the second feedback capacitor C9 is connected to the first terminal of the second feedback resistor R2; the second terminal of the second feedback resistor R2 and the drain of the fourth MOSFET M12 are connected to the negative input terminal of the output reconfigurable matching module 4 as the negative output terminal of the power stage amplifier module 3.

[0061] As can be seen, this embodiment includes a current multiplexing module, which enables the current of the amplification stage to be shared with the driver stage amplification module 1 through the interstage transformer, thereby reducing the amplifier's losses.

[0062] As an optional embodiment, the output terminals of the power stage amplifier module 3 include a positive output terminal and a negative output terminal, and the output terminals of the output reconfigurable matching module 4 also include a positive output terminal and a negative output terminal. The output reconfigurable matching module 4 includes a reconfigurable output transformer 9, a third variable capacitor 10, and a fourth variable capacitor 11. The reconfigurable output transformer 9 includes a third inductor L3, a fourth inductor L4, a second ground ring 12, a third switch M3, and a fourth switch M4. The first terminals of the third inductor L3 and the third variable capacitor 10 are connected to the positive output terminal of the power stage amplifier module 3. The second terminal of the third inductor L3 and the second terminal of the third variable capacitor 10 are connected to the negative output terminal of the power stage amplifier module 3; wherein, the third inductor L3 is also connected to the power supply voltage VDD, and the first terminal of the third inductor L3 is the same-name terminal of the third inductor L3; the first terminal of the fourth inductor L4 and the first terminal of the fourth variable capacitor 11 serve as the positive output terminal of the output reconfigurable matching module 4, and the second terminal of the fourth inductor L4 and the second terminal of the fourth variable capacitor 11 serve as the negative output terminal of the output reconfigurable matching module 4; wherein, the first terminal of the fourth inductor L4 is the same-name terminal of the fourth inductor L4.

[0063] For a detailed description of the third variable capacitor 10, fourth variable capacitor 11, third inductor L3, fourth inductor L4, second ground ring 12, third switch M3, and fourth switch M4 provided in this embodiment, please refer to the above embodiment of the first variable capacitor 6, second variable capacitor 7, first inductor L1, second inductor L2, first ground ring 8, first switch M1, and second switch M2. This utility model will not repeat the description here. It should be noted that the third variable capacitor 10 may include the third capacitor C10 and the seventh switch M7, the fourth variable capacitor 11 may include the fourth capacitor C11 and the eighth switch M8, the third inductor L3 is the primary coil, and the fourth inductor L4 is the secondary coil.

[0064] As an optional embodiment, it also includes a wideband input matching module, the input terminal of which is connected to the second terminal of the DC blocking capacitor C1, and the output terminal of which is connected to the input terminal of the driver stage amplifier module 1.

[0065] Traditional transconductance enhancement techniques typically employ common-gate amplifiers. While common-gate amplifiers are easier to match with wideband input than common-source amplifiers, they suffer from poorer noise performance and lower gain. Therefore, this embodiment includes a wideband input matching module, which is a transconductance enhancement technique based on a common-source amplifier.

[0066] In this embodiment, the driver stage amplification module 1 can be the fifth MOSFET M13, and the wideband input matching module 2 can include a fifth inductor L5 and a sixth inductor L6; the first end of the fifth inductor L5 is connected to the second end of the DC blocking capacitor C1 and the gate of the fifth MOSFET M13, and the second end of the fifth inductor L5 is grounded; wherein, the first end of the fifth inductor L5 is the same-name terminal of the fifth inductor L5; the first end of the sixth inductor L6 is connected to the source of the fifth MOSFET M13, and the second end of the sixth inductor L6 is grounded; wherein, the second end of the sixth inductor L6 is the same-name terminal of the sixth inductor L6.

[0067] Specifically, when the gate of the fifth MOSFET M13 receives an RF signal, the RF signal is coupled to the secondary coil through the primary coil and is out of phase with the signal at the gate of the fifth MOSFET M13. Since the RF signal acts on the gate and source of the fifth MOSFET M13 simultaneously with opposite phase, the voltage swing between the gate and drain of the fifth MOSFET M13 is increased, ultimately improving the equivalent transconductance of the fifth MOSFET M13.

[0068] Furthermore, since the equivalent transconductance of the fifth MOSFET M13 decreases at high frequencies, and this decrease directly affects the voltage gain of the fifth MOSFET M13, it leads to gain attenuation in the high-frequency range, affecting signal amplification capability. To address this, a seventh inductor L7 or a microstrip line TL can be introduced into the gate of the fifth MOSFET M13. This design not only improves the equivalent transconductance at high frequencies but also reduces the imaginary part of the input impedance.

[0069] In a first specific embodiment, the broadband input matching module may further include a seventh inductor L7, the first end of which is connected to the second end of the DC blocking capacitor C1 and the first end of the fifth inductor L5, and the second end of the seventh inductor L7 is connected to the gate of the fifth MOS transistor M13.

[0070] In a second specific embodiment, the broadband input matching module may further include a microstrip line TL, the first end of which is connected to the second end of the DC blocking capacitor C1 and the first end of the fifth inductor L5, and the second end of the microstrip line TL is connected to the gate of the fifth MOSFET M13.

[0071] As can be seen, this embodiment is equipped with a wideband input matching module, which can maintain good matching over a wide frequency range, enabling the amplifier to work efficiently in multiple frequency bands.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0073] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0074] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An amplifier characterized by, The power amplifier comprises a driving stage amplification module, an inter-stage reconfigurable matching module, a power stage amplification module and an output reconfigurable matching module; wherein the inter-stage reconfigurable matching module and the output reconfigurable matching module each comprise a ground ring and a plurality of switches, the ground ring is connected to the first end of the plurality of switches corresponding thereto, and the second end of the plurality of switches is grounded; The input end of the driving stage amplification module is connected to the input end of the amplifier to input a radio frequency signal, and the output end of the driving stage amplification module is connected to the input end of the inter-stage reconfigurable matching module; The output end of the inter-stage reconfigurable matching module is connected to the input end of the power stage amplification module; The output end of the power stage amplification module is connected to the input end of the output reconfigurable matching module; The output end of the output reconfigurable matching module is the output end of the amplifier.

2. The amplifier of claim 1, wherein, A DC blocking capacitor is further included, the first end of the DC blocking capacitor is connected to the input end of the amplifier to input the radio frequency signal, and the second end of the DC blocking capacitor is connected to the input end of the driving stage amplification module.

3. The amplifier of claim 2, wherein, The input end of the power stage amplification module comprises a first radio frequency input end and a second radio frequency input end, the output end of the power stage amplification module comprises a direct current output end, the inter-stage reconfigurable matching module comprises a reconfigurable inter-stage transformer, a first variable capacitor and a second variable capacitor; wherein the reconfigurable inter-stage transformer comprises a first inductor, a second inductor, a first ground ring, a first switch tube and a second switch tube; The first end of the first inductor and the first end of the first variable capacitor are connected to the output end of the driving stage amplification module, and the second end of the first inductor is connected to the direct current output end of the power stage amplification module; wherein the first end of the first inductor is the same-named end of the first inductor; The second end of the first variable capacitor is grounded; The first end of the second inductor and the first end of the second variable capacitor are connected to the first radio frequency input end of the power stage amplification module, the second end of the second inductor is connected to the second radio frequency input end of the power stage amplification module and the second end of the second variable capacitor; wherein the first end of the second inductor is the same-named end of the second inductor.

4. The amplifier of claim 3, wherein, The output end of the power stage amplification module further comprises a positive output end and a negative output end, the input end of the output reconfigurable matching module comprises a positive input end and a negative input end, and the power stage amplification module comprises a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube; The gate of the first MOS tube is connected to the first end of the second inductor and the first end of the second variable capacitor as the first radio frequency input end of the power stage amplification module, the drain of the first MOS tube is connected to the source of the second MOS tube, and the source of the first MOS tube and the source of the third MOS tube are connected to the second end of the first inductor as the direct current output end of the power stage amplification module; The gate of the second MOS tube is grounded, and the drain of the second MOS tube is connected to the positive input end of the output reconfigurable matching module as the positive output end of the power stage amplification module; The gate of the third MOS tube is connected with the second end of the first inductor and the second end of the second variable capacitor as the second radio frequency input end of the power stage amplification module, and the drain of the third MOS tube is connected with the source of the fourth MOS tube; The gate of the fourth MOS tube is grounded, and the drain of the fourth MOS tube is connected with the negative input end of the output reconfigurable matching module as the negative output end of the power stage amplification module.

5. The amplifier of claim 4, wherein, The power stage amplification module further comprises a current multiplexing module, and the current multiplexing module comprises a first bypass capacitor and a second bypass capacitor; The first end of the first bypass capacitor and the first end of the second bypass capacitor are connected with the source of the first MOS tube, the source of the third MOS tube and the second end of the first inductor, and the second end of the first bypass capacitor and the second end of the second bypass capacitor are grounded.

6. The amplifier of claim 2, wherein, The output end of the power stage amplification module comprises a positive output end and a negative output end, the output end of the output reconfigurable matching module comprises a positive output end and a negative output end, and the output reconfigurable matching module comprises a reconfigurable output transformer, a third variable capacitor and a fourth variable capacitor; wherein the reconfigurable output transformer comprises a third inductor, a fourth inductor, a second ground ring, a third switch tube and a fourth switch tube; The first end of the third inductor and the first end of the third variable capacitor are connected with the positive output end of the power stage amplification module, and the second end of the third inductor and the second end of the third variable capacitor are connected with the negative output end of the power stage amplification module; wherein the third inductor is further connected with a power supply voltage, and the first end of the third inductor is the same-named end of the third inductor; The first end of the fourth inductor and the first end of the fourth variable capacitor are connected with the positive output end of the output reconfigurable matching module, and the second end of the fourth inductor and the second end of the fourth variable capacitor are connected with the negative output end of the output reconfigurable matching module; wherein the first end of the fourth inductor is the same-named end of the fourth inductor.

7. An amplifier as claimed in any one of claims 2 to 6, characterised in that, Further comprising a wideband input matching module, the input end of the wideband input matching module is connected with the second end of the direct current blocking capacitor, and the output end of the wideband input matching module is connected with the input end of the driving stage amplification module.

8. The amplifier of claim 7, wherein, The driving stage amplification module is a fifth MOS tube, and the wideband input matching module comprises a fifth inductor and a sixth inductor; The first end of the fifth inductor is connected with the second end of the direct current blocking capacitor and the gate of the fifth MOS tube, and the second end of the fifth inductor is grounded; wherein the first end of the fifth inductor is the same-named end of the fifth inductor; The first end of the sixth inductor is connected with the source of the fifth MOS tube, and the second end of the sixth inductor is grounded; wherein the second end of the sixth inductor is the same-named end of the sixth inductor.

9. The amplifier of claim 8, wherein, The wideband input matching module further comprises a seventh inductor, the first end of the seventh inductor is connected with the second end of the direct current blocking capacitor and the first end of the fifth inductor, and the second end of the seventh inductor is connected with the gate of the fifth MOS tube.

10. The amplifier of claim 8, wherein, The wideband input matching module further comprises a microstrip line, a first end of the microstrip line is connected with a second end of the DC blocking capacitor and a first end of the fifth inductor, and a second end of the microstrip line is connected with a gate of the fifth MOS tube.

Images