Reconfigurable current multiplexing radio frequency amplifier circuit

Abstract

The invention relates to a current multiplexing radio-frequency amplifier circuit which comprises an input-stage amplification unit, an output-stage amplification unit and an intermediate-stage amplification component, and the current of the power supply is input from the input-stage amplification unit or the output-stage amplification unit or the intermediate-stage amplification assembly. The power supply can be fed in from any front, middle and rear positions, and when the power supply is fed in from the front or the rear, the grounding position of the circuit can be placed on a middle stage, so that the circuit can be flexibly selected to be connected to a certain middle stage according to the linearity and power consumption requirements; and the reconfigurable current multiplexing can be realized by switching the switch configuration according to an actual application scene, so that the high-low gain mode switching, the gain dynamic adjustment and the system power consumption reduction are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuits, and in particular to a reconfigurable current multiplexing radio frequency amplifier circuit. Background Art

[0002] In high-frequency circuit systems such as microwave, RF, millimeter-wave, and terahertz, amplifier design techniques with low power consumption are required to reduce system power consumption. Current reuse is a widely used low-power amplifier design technique. Its characteristic is that two or more amplifier stages share the same current path. This is equivalent to using the power consumption of a single amplifier to achieve the gain of two or three stages. Therefore, current reuse can achieve high-gain and low-power amplifiers.

[0003] The existing Chinese patent application number is 202110437282.1, "A Current-Reused RF Amplifier Circuit", which discloses an on-chip four-turn coupling transformer and an on-chip three-turn coupling transformer structure. It uses GM-boost technology to ensure that the circuit has a low noise figure, wide bandwidth and high gain. By applying current reuse technology, multiple cascade units share a DC power supply, which effectively reduces the power consumption of the RF amplifier, thereby reducing the power consumption cost of the system. However, this technical solution is to place the power supply at the end, that is, the power supply is placed in the last-stage amplifier unit and the ground is placed in the first-stage amplifier unit, which will result in limited linearity of the output stage (the last stage).

[0004] The Chinese patent application number 202410119899.2, "Current Multiplexing Amplifier and Electronic Device", provides a current multiplexing amplifier and an electronic device. The current multiplexing amplifier includes at least two amplifier stages, which are connected in series in the signal input direction; the amplifier connected to the signal input end is the first amplifier, and the amplifier connected to the signal output end is the final amplifier; the power supply end of the first amplifier is connected to the positive end of the amplifier power supply, and the ground end of the final amplifier is connected to the negative end of the amplifier power supply; for two adjacent amplifiers, the ground end of the previous amplifier is connected to the power supply end of the next amplifier; the amplifier power supply is used to power the first amplifier to generate a power supply current; the power supply current starts from the positive end of the amplifier power supply, flows through at least two amplifier stages in sequence, flows out from the ground end of the final amplifier, and finally flows back to the negative end of the amplifier power supply. This application can effectively improve the linearity of the current multiplexing amplifier. Although the technical solution is to put the power supply in front, put the power supply in the first amplifier unit and the ground in the last amplifier unit, which improves the linearity, the power consumption also increases. The power supply current I dc Determined by the last stage, the output stage usually has the largest power consumption, and the linearity limitation of the entire multi-stage amplifier may occur in the intermediate stage.

[0005] In some applications (such as when the device is in standby mode or does not require high-gain operation), the circuit needs to be able to switch between high and low gains to reduce the device's operating power consumption. However, the existing current multiplexing technology does not have the purpose of gain reconfiguration. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a reconfigurable current multiplexing radio frequency amplifier circuit to solve the deficiencies of the prior art.

[0007] The object of the present invention is achieved through the following technical solution: a current multiplexing radio frequency amplifier circuit, which includes an input stage amplification unit and an output stage amplification unit, and also includes an intermediate stage amplification component; the current of the power supply is input from the input stage amplification unit or the output stage amplification unit or the intermediate stage amplification component;

[0008] When the power supply is input from the input stage amplifier unit, the DC current flows out of the input stage amplifier unit and then flows into the power supply input terminal of the output stage amplifier unit. Then the current flows out of the output stage amplifier unit and then flows into the intermediate stage amplifier component and finally flows out from the ground terminal of the intermediate stage amplifier component.

[0009] When the power supply is input from the output stage amplifier unit, the DC current flows out of the output stage amplifier unit and then flows into the current input terminal of the input stage amplifier unit. Then the current flows out of the input stage amplifier unit and then flows into the intermediate stage amplifier component and finally flows out from the ground terminal of the intermediate stage amplifier component.

[0010] When the power supply is input from the intermediate-stage amplifying component, the DC current flows out of the intermediate-stage amplifying component and then flows into the current input terminal of the output-stage amplifying unit, then the current flows out of the output-stage amplifying unit and then flows into the current output terminal of the input-stage amplifying unit, and finally flows out from the ground terminal of the input-stage amplifying unit; or when the power supply is input from the intermediate-stage amplifying component, the DC current flows out of the intermediate-stage amplifying component and then flows into the current input terminal of the input-stage amplifying unit, then the current flows out of the input-stage amplifying unit and then flows into the current output terminal of the output-stage amplifying unit, and finally flows out from the ground terminal of the output-stage amplifying unit.

[0011] The intermediate stage amplification component includes N-2 cascaded amplification units. When the power supply is input from the output stage amplification unit or the input stage amplification unit, the current flows from the first amplification unit, then flows into the next cascaded amplification unit in sequence, and finally flows out from the ground terminal of the last amplification unit.

[0012] When the power supply is input from the intermediate stage amplifying component, the current flows into the amplifying unit at one end of the intermediate stage amplifying component, then flows into the next cascade amplifying unit in sequence, and finally flows out from the last amplifying unit to the output stage amplifying unit.

[0013] The intermediate stage amplifying component further includes at least one non-amplifying element, and any non-amplifying element is connected between any two amplifying units.

[0014] When the power supply is input from the output stage amplifying unit or the input stage amplifying unit, the current output end of the input stage amplifying unit and the current output end of the output stage amplifying unit are each connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded;

[0015] When the power supply is input from the intermediate stage amplifying component, the current output ends of the output stage amplifying unit and the intermediate stage amplifying component are each connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

[0016] When the power supply is input from the output-stage amplifying unit or the input-stage amplifying unit, the current output terminals of all the amplifying units and non-amplifying elements of the N-2 amplifying units, except for the last amplifying unit, are connected to a decoupling capacitor, the other terminal of the decoupling capacitor is grounded, and the current output terminal of the last amplifying unit is grounded;

[0017] When the power supply is input from the intermediate stage amplifying component, the current output ends of the N-2 amplifying units and the non-amplifying elements are all connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

[0018] The input stage amplification unit includes an input matching module and a first stage amplification core module, the input matching module is connected to the first stage amplification core module, and the first stage amplification core module is connected to the intermediate stage amplification component;

[0019] The output stage amplification unit includes an output matching module, an N-stage amplification core module and an output inter-stage matching module, the output matching module is connected to the N-stage amplification core module, the N-stage amplification core module is connected to the output inter-stage matching module, and the output inter-stage matching module is connected to the intermediate stage amplification component;

[0020] The intermediate-stage amplification component includes N-2 cascaded amplification units, each amplification unit includes an amplification core module and an inter-stage matching module, the first-stage amplification core module is connected to the inter-stage matching module of the first amplification unit, and the core amplification module of the last amplification unit is connected to the output inter-stage matching module.

[0021] When the power supply is input from the input stage amplification unit, the DC current flows from the interstage matching module connected to the first stage amplification core module into the first stage amplification core module. After the current flows out of the first stage amplification core module, it flows into the output matching module. The output matching module outputs the current to the Nth stage amplification core module. The Nth stage amplification core module outputs the current to the output interstage matching module. Then, it flows into the amplification core module connected to the output interstage matching module. The amplification core module outputs the current to the interstage matching module connected to it. Then, the current flows through each amplification unit in turn and finally flows out from the ground terminal of the last amplification unit.

[0022] When the power supply is input from the output stage amplifier unit, the DC current flows out of the output matching module and then flows into the N-stage amplifier core module. The N-stage amplifier core module outputs current to the interstage matching module connected to the input stage amplifier unit. The interstage matching module outputs current to the first-stage amplifier core module. The first-stage amplifier core module outputs current to the output interstage matching module. The output interstage matching module outputs current to the core amplifier module connected to it. Then the current flows through each amplifier unit in turn and finally flows out from the ground terminal of the last amplifier unit.

[0023] When the power supply is input from the intermediate-stage amplifying component, the DC current flows out from the output inter-stage matching module connected to the amplifying unit, and then flows into the amplifying core module connected to it. Then the current flows through each amplifying unit in turn, and is output from the amplifying core module in the last amplifying unit to the output matching module. The output matching module outputs current to the N-stage amplifying core module, and the N-stage amplifying core module outputs current to the inter-stage matching module in the last amplifying unit. Then, the current flows into the first-stage amplifying core module and flows out from the ground terminal of the first-stage amplifying core module.

[0024] The input stage amplifying unit, the output stage amplifying unit and the intermediate stage amplifying component include a differential form with dual input and dual output or a single-ended form with single input and single output.

[0025] A reconfigurable current multiplexing radio frequency amplifier circuit, comprising the current multiplexing radio frequency amplifier circuit;

[0026] The current output end of the input-stage amplifying unit is connected to the intermediate-stage amplifying component and the output-stage amplifying component via a first switch, and the current output end of the output-stage amplifying unit is connected to the intermediate-stage amplifying component and ground via a second switch. By controlling the on-off states of the first switch and the second switch, high- and low-gain switching of the circuit is achieved;

[0027] The current output end of the output-stage amplifying unit is connected to the intermediate-stage amplifying component and the input-stage amplifying component via a first switch, and the current output end of the input-stage amplifying unit is connected to the intermediate-stage amplifying component and ground via a second switch. By controlling the on / off states of the first and second switches, high and low gain switching of the circuit is achieved;

[0028] The current output end of the intermediate stage amplifying component is connected to the current input end of the output stage amplifying unit, and is connected to the current input end of the input stage amplifying unit and the ground through a first switch. At the same time, the current output end of the output stage amplifying unit is connected to the input stage amplifying unit and the ground through a second switch. By controlling the on-off state of the first switch and the second switch, high and low gain switching of the circuit is achieved.

[0029] When the power supply is input from the input-stage amplifying unit, when the first switch is turned on and the second switch is switched to be connected to the ground, the current output from the input-stage amplifying unit is divided by the intermediate-stage amplifying component and the output-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is turned off and the second switch is switched to be connected to the intermediate-stage amplifying component, the current output from the input-stage amplifying unit flows through the output-stage amplifying unit and the intermediate-stage amplifying component in sequence, and the circuit is in a high-gain state;

[0030] When the power supply is input from the output-stage amplifier unit, when the first switch is turned on and the second switch is switched to be connected to the ground, the current output from the output-stage amplifier unit is divided by the intermediate-stage amplifier component and the input-stage amplifier unit, and the circuit is in a low-gain state; when the first switch is turned on and the second switch is switched to be connected to the intermediate-stage amplifier component, the current output from the output-stage amplifier unit flows through the input-stage amplifier unit and the intermediate-stage amplifier component in sequence, and the circuit is in a high-gain state;

[0031] When the power supply is input from the intermediate-stage amplifying component, when the first switch is turned on and the second switch control is switched to be connected to the ground, the current output from the intermediate-stage amplifying component is shunted by the output-stage amplifying unit and the input-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is disconnected and the second switch control is switched to be connected to the output-stage amplifying unit, the current output from the intermediate-stage amplifying component flows through the output-stage amplifying unit and the input-stage amplifying unit in sequence, and the circuit is in a high-gain state.

[0032] The present invention has the following advantages: a reconfigurable current multiplexing radio frequency amplifier circuit, in which power can be fed from any position of the front, middle and rear. When fed from the front or rear, the grounding position of the circuit can be placed on the middle level, so that it can be flexibly selected to be connected to a certain middle level according to linearity and power consumption requirements, and high and low gain switching can be realized according to actual application scenarios to realize gain reconfiguration of current multiplexing, thereby reducing the operating power consumption of the circuit and realizing dynamic gain adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the principle structure of the differential form of the power supply in advance of the present invention;

[0034] Figure 2 This is a schematic diagram of the principle structure of the differential form of the power supply post-position of the present invention;

[0035] Figure 3 This is a schematic diagram of the principle structure of the time-differential form of the power supply of the present invention;

[0036] Figure 4 This is a schematic diagram of the principle structure of the single-ended form when the power supply is pre-placed in the present invention;

[0037] Figure 5 This is a schematic diagram of the principle structure of the single-ended form when the power supply is rear-mounted in the present invention;

[0038] Figure 6 This is a schematic diagram of the principle structure of the single-ended form when the power supply of the present invention is centrally located;

[0039] Figure 7 This is a schematic diagram of a differential circuit in which the power supply is pre-placed according to the present invention;

[0040] Figure 8 This is a circuit diagram of the differential form of the present invention when the power supply is placed later;

[0041] Figure 9 This is a circuit diagram of a time-differential form of a power supply according to the present invention;

[0042] Figure 10 This is a schematic diagram of the reconfigurable principle structure of the power front-end differential form of the present invention;

[0043] Figure 11 This is a schematic diagram of the reconfigurable principle structure of the differential form of the power supply post-position of the present invention;

[0044] Figure 12 This is a schematic diagram of the reconfigurable principle structure of the time-differential form of the power supply of the present invention;

[0045] Figure 13 This is a schematic diagram of the reconfigurable principle structure of a single-ended form when the power supply is in front;

[0046] Figure 14 This is a schematic diagram of the reconfigurable principle structure of a single-ended form when the power supply is rear-mounted in the present invention;

[0047] Figure 15 This is a schematic diagram of the reconfigurable principle structure of a single-ended form when the power supply is centered in the present invention;

[0048] Figure 16 This is a schematic diagram of a reconfigurable circuit in a differential form with a power supply in advance according to the present invention;

[0049] Figure 17 This is a schematic diagram of a reconfigurable circuit in a differential form with a post-power supply according to the present invention;

[0050] Figure 18 This is a schematic diagram of a reconfigurable circuit in a time-differential form in a power supply according to the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the drawings is not intended to limit the scope of protection of the present application for which protection is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. The present invention is further described below in conjunction with the drawings.

[0052] like Figure 1-Figure 3 As shown, one embodiment of the present invention relates to a current multiplexing radio frequency amplifier circuit, which includes an input stage amplification unit and an output stage amplification unit, and an intermediate stage amplification component arranged between the input stage amplification unit and the output stage amplification unit, and the input stage amplification unit, the output stage amplification unit and the intermediate stage amplification component are all in a differential form with dual input and dual output.

[0053] Among them, the power supply V DD The current is input from the input stage amplifier unit, the output stage amplifier unit or the intermediate stage amplifier component, that is, the power supply is fed in three ways: front, rear and middle.

[0054] Furthermore, when the current of the power supply is input from the input stage amplifying unit, the current flows out of the input stage amplifying unit and then flows into the current input end of the output stage amplifying unit. Then the current flows out of the output stage amplifying unit and then flows into the intermediate stage amplifying component and finally flows out from the ground end of the intermediate stage amplifying component.

[0055] When the power supply is input from the output stage amplifier unit, the current flows out of the output stage amplifier unit and then flows into the current input terminal of the input stage amplifier unit. Then the current flows out of the input stage amplifier unit and then flows into the intermediate stage amplifier component and finally flows out from the ground terminal of the intermediate stage amplifier component.

[0056] At this time, the current output ends of the input stage amplifying unit and the output stage amplifying unit are each connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

[0057] When the power supply is input from the intermediate-stage amplifier component, the current flows out of the intermediate-stage amplifier component and then flows into the current input terminal of the output-stage amplifier unit. The current then flows out of the output-stage amplifier unit and then flows into the current output terminal of the input-stage amplifier unit before finally flowing out of the ground terminal of the input-stage amplifier unit. At this time, the current output terminals of the output-stage amplifier unit and the intermediate-stage amplifier component are each connected to a decoupling capacitor, the other end of which is grounded. Alternatively, when the power supply is input from the intermediate-stage amplifier component, the DC current flows out of the intermediate-stage amplifier component and then flows into the current input terminal of the input-stage amplifier unit. The current then flows out of the input-stage amplifier unit and then flows into the current output terminal of the output-stage amplifier unit before finally flowing out of the ground terminal of the output-stage amplifier unit.

[0058] Furthermore, the intermediate-stage amplifying component includes N-2 cascaded amplifying units, and multiple non-amplifying elements, such as attenuators and phase shifters, etc., can be added to the intermediate-stage amplifying component. The multiple non-amplifying elements can be connected one by one between any two amplifying units, or multiple non-amplifying elements can be connected together between any two amplifying units; when the power supply is input from the output-stage amplifying unit or the input-stage amplifying unit, the current flows into the first amplifying unit, and then flows into the next cascaded amplifying unit in turn, and finally flows out from the ground end of the last amplifying unit; at this time, except for the last amplifying unit, the current output ends of all the amplifying units and non-amplifying elements in the N-2 amplifying units are connected to a decoupling capacitor, the other end of the decoupling capacitor is grounded, and the current output end of the last amplifying unit is grounded.

[0059] When the power supply is input from the intermediate-stage amplifying component, the current flows into the amplifying unit at one end of the intermediate-stage amplifying component, then flows into the next cascaded amplifying units in sequence, and finally flows out from the last amplifying unit to the output-stage amplifying unit; at this time, the current output ends of the N-2 amplifying units and non-amplifying elements are all connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

[0060] Furthermore, if Figure 4-Figure 6 As shown, another embodiment of the present invention is to replace the dual-input dual-output differential form of the input stage amplifying unit, the output stage amplifying unit and the intermediate stage amplifying component with a single-input single-output single-ended form on the basis of the above embodiment, and the other parts are consistent.

[0061] Furthermore, in this embodiment, a total of three stages of amplification are adopted. The input-stage amplification unit includes an input matching module and a first-stage amplification core module. The input matching module is connected to the first-stage amplification core module, and the first-stage amplification core module is connected to the intermediate-stage amplification component; the output-stage amplification unit includes an output matching module, a third-stage amplification core module and an output inter-stage matching module. The output matching module is connected to the third-stage amplification core module, the third-stage amplification core module is connected to the output inter-stage matching module, and the output inter-stage matching module is connected to the intermediate-stage amplification component; the intermediate-stage amplification component includes a second-stage amplification core module and an inter-stage matching module. The second-stage amplification core module is connected to the inter-stage matching module and the output inter-stage matching module, and the inter-stage matching module is connected to the first-stage amplification core module.

[0062] Furthermore, the input matching module, the output matching module, the inter-stage matching module and the output inter-stage matching module are all transformers of the same structure, and existing transformers can be used; the first-stage amplification core module, the second-stage amplification core module and the third-stage amplification core module all sample the same amplification structure, and are all differential common-source and common-gate amplifier architectures, and other amplifier architectures such as common source and common gate can also be used.

[0063] Further, if Figure 7 As shown, when the power supply is input from the input stage amplifying unit, the current flows from the interstage matching module connected to the first stage amplifying core module into the first stage amplifying core module. After the current flows out of the first stage amplifying core module, it flows into the output matching module. The output matching module outputs the current to the third stage amplifying core module. The third stage amplifying core module outputs the current to the output interstage matching module. The current then flows into the second stage amplifying core module connected to the output interstage matching module, and then flows out from the ground end of the second stage amplifying core module.

[0064] like Figure 8 As shown, when the power supply is input from the output stage amplifier unit, the current flows out of the output matching module and then flows into the third stage amplifier core module. The third stage amplifier core module outputs current to the interstage matching module connected to the input stage amplifier unit. The interstage matching module outputs current to the first stage amplifier core module. The first stage amplifier core module outputs current to the output interstage matching module. The output interstage matching module outputs current to the second stage core amplifier module connected to it, and then flows out from the ground end of the second stage amplifier core module.

[0065] like Figure 9 and Figure 15As shown, when the power supply is input from the intermediate-stage amplifier component, the current flows out of the output inter-stage matching module, then flows into the second-stage amplifier core module connected thereto, and then is output from the second-stage amplifier core module to the output matching module. The output matching module outputs the current to the third-stage amplifier core module, and the third-stage amplifier core module outputs the current to the inter-stage matching module. Then, the current flows into the first-stage amplifier core module and flows out from the ground terminal of the first-stage amplifier core module.

[0066] The power supply of the present invention can be fed from any position of the front, middle and rear. When fed from the front or rear, the grounding position of the circuit can be placed on the middle level, so that it can be flexibly selected to be connected to a middle level according to linearity and power consumption requirements.

[0067] Another embodiment of the present invention relates to a reconfigurable current-multiplexing RF amplifier circuit, which is implemented based on the current-multiplexing RF amplifier circuit described in the first embodiment. This embodiment adds a first switch and a second switch on the basis of the current-multiplexing RF amplifier circuit. In this embodiment, the input-stage amplification unit, the output-stage amplification unit, and the intermediate-stage amplification component are all in a differential form with dual input and dual output.

[0068] like Figure 10 and Figure 16 As shown, the current output end of the input stage amplifying unit is connected to the intermediate stage amplifying component and the output stage amplifying component through a first single-pole single-throw control switch, and the current output end of the output stage amplifying unit is connected to the intermediate stage amplifying component and the ground through a second single-pole double-throw control switch. By controlling the on-off state of the first switch and the second control switch, the high and low gain switching of the circuit is realized.

[0069] Furthermore, when the power supply is input from the input-stage amplifying unit, when the first switch is turned on and the second switch is switched to be connected to the ground, the current output from the input-stage amplifying unit is divided by the intermediate-stage amplifying component and the output-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is turned off and the second switch is switched to be connected to the intermediate-stage amplifying component, the current output from the input-stage amplifying unit flows through the output-stage amplifying unit and the intermediate-stage amplifying component in sequence, and the circuit is in a high-gain state;

[0070] like Figure 11 and Figure 17 As shown, the current output end of the output stage amplifying unit is connected to the intermediate stage amplifying component and the input stage amplifying component through a first single-pole single-throw control switch, and the current output end of the input stage amplifying unit is connected to the intermediate stage amplifying component and the ground through a second single-pole double-throw control switch. By controlling the on-off state of the first switch and the second control switch, the high and low gain switching of the circuit is realized.

[0071] Furthermore, when the power supply is input from the output-stage amplifying unit, when the first switch is turned on and the second switch control is switched to be connected to the ground, the current output from the output-stage amplifying unit is shunted by the intermediate-stage amplifying component and the input-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is turned on and the second switch is switched to be connected to the intermediate-stage amplifying component, the current output from the output-stage amplifying unit flows through the input-stage amplifying unit and the intermediate-stage amplifying component in sequence, and the circuit is in a high-gain state.

[0072] like Figure 12 and Figure 18 As shown, the current output end of the intermediate stage amplifying component is connected to the current input end of the output stage amplifying unit, and is connected to the current input end of the input stage amplifying unit and the ground through a first switch. At the same time, the current output end of the output stage amplifying unit is connected to the input stage amplifying unit and the ground through a second switch. By controlling the on-off state of the first switch and the second switch, the high and low gain switching of the circuit is realized.

[0073] Furthermore, when the power supply is input from the intermediate-stage amplifying component, when the first switch is turned on and the second switch control is switched to be connected to the ground, the current output from the intermediate-stage amplifying component is shunted by the output-stage amplifying unit and the input-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is disconnected and the second switch control is switched to be connected to the output-stage amplifying unit, the current output from the intermediate-stage amplifying component flows through the output-stage amplifying unit and the input-stage amplifying unit in sequence, and the circuit is in a high-gain state.

[0074] like Figure 13 and Figure 14 As shown, another embodiment of the present invention is to replace the dual-input dual-output differential form of the input stage amplification unit, the output stage amplification unit and the intermediate stage amplification component in a reconfigurable current multiplexing RF amplifier circuit in the previous embodiment with a single-input single-output single-ended form, and the other components are the same.

[0075] The present invention switches between high-gain and low-gain states through a first switch and a second switch control circuit to cope with different usage scenarios, achieve dynamic gain adjustment, and reduce system power consumption, wherein the first switch is a single-pole single-throw switch and the second switch is a single-pole double-throw switch.

[0076] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention is capable of various other combinations, modifications, and improvements, and is capable of modifications within the scope of the concepts described herein, through the above teachings, or through techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. A current multiplexing radio frequency amplifier circuit, comprising an input stage amplifier unit and an output stage amplifier unit, characterized in that: It also includes an intermediate stage amplifying component; the current of the power supply is input from the input stage amplifying unit or the output stage amplifying unit or the intermediate stage amplifying component; When the power supply is input from the input stage amplifier unit, the DC current flows out of the input stage amplifier unit and then flows into the power supply input terminal of the output stage amplifier unit. Then the current flows out of the output stage amplifier unit and then flows into the intermediate stage amplifier component and finally flows out from the ground terminal of the intermediate stage amplifier component. When the power supply is input from the output stage amplifier unit, the DC current flows out of the output stage amplifier unit, then flows into the current input terminal of the input stage amplifier unit, then flows out of the input stage amplifier unit, then flows into the intermediate stage amplifier component, and finally flows out from the ground terminal of the intermediate stage amplifier component; When the power supply is input from the intermediate-stage amplifying component, the DC current flows out of the intermediate-stage amplifying component and then flows into the current input terminal of the output-stage amplifying unit, then the current flows out of the output-stage amplifying unit and then flows into the current output terminal of the input-stage amplifying unit, and finally flows out from the ground terminal of the input-stage amplifying unit; or when the power supply is input from the intermediate-stage amplifying component, the DC current flows out of the intermediate-stage amplifying component and then flows into the current input terminal of the input-stage amplifying unit, then the current flows out of the input-stage amplifying unit and then flows into the current output terminal of the output-stage amplifying unit, and finally flows out from the ground terminal of the output-stage amplifying unit.

2. The current multiplexing radio frequency amplifier circuit according to claim 1, characterized in that: The intermediate stage amplification component includes N-2 cascaded amplification units. When the power supply is input from the output stage amplification unit or the input stage amplification unit, the current flows from the first amplification unit, then flows into the next cascaded amplification unit in sequence, and finally flows out from the ground terminal of the last amplification unit. When the power supply is input from the intermediate stage amplifying component, the current flows into the amplifying unit at one end of the intermediate stage amplifying component, then flows into the next cascade amplifying unit in sequence, and finally flows out from the last amplifying unit to the output stage amplifying unit.

3. The current multiplexing radio frequency amplifier circuit according to claim 2, characterized in that: The intermediate stage amplifying component further includes at least one non-amplifying element, and any non-amplifying element is connected between any two amplifying units.

4. The current multiplexing radio frequency amplifier circuit according to claim 1, characterized in that: When the power supply is input from the output stage amplifying unit or the input stage amplifying unit, the current output end of the input stage amplifying unit and the current output end of the output stage amplifying unit are each connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded; When the power supply is input from the intermediate stage amplifying component, the current output ends of the output stage amplifying unit and the intermediate stage amplifying component are each connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

5. The current multiplexing radio frequency amplifier circuit according to claim 3, characterized in that: When the power supply is input from the output-stage amplifying unit or the input-stage amplifying unit, the current output terminals of all the amplifying units and non-amplifying elements of the N-2 amplifying units, except for the last amplifying unit, are connected to a decoupling capacitor, the other terminal of the decoupling capacitor is grounded, and the current output terminal of the last amplifying unit is grounded; When the power supply is input from the intermediate stage amplifying component, the current output ends of the N-2 amplifying units and the non-amplifying elements are all connected to a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

6. The current multiplexing radio frequency amplifier circuit according to claim 1, characterized in that: The input stage amplification unit includes an input matching module and a first stage amplification core module, the input matching module is connected to the first stage amplification core module, and the first stage amplification core module is connected to the intermediate stage amplification component; The output stage amplification unit includes an output matching module, an N-stage amplification core module and an output inter-stage matching module, the output matching module is connected to the N-stage amplification core module, the N-stage amplification core module is connected to the output inter-stage matching module, and the output inter-stage matching module is connected to the intermediate stage amplification component; The intermediate-stage amplification component includes N-2 cascaded amplification units, each amplification unit includes an amplification core module and an inter-stage matching module, the first-stage amplification core module is connected to the inter-stage matching module of the first amplification unit, and the core amplification module of the last amplification unit is connected to the output inter-stage matching module.

7. The current multiplexing radio frequency amplifier circuit according to claim 6, characterized in that: When the power supply is input from the input stage amplification unit, the DC current flows from the interstage matching module connected to the first stage amplification core module into the first stage amplification core module. After the current flows out of the first stage amplification core module, it flows into the output matching module. The output matching module outputs the current to the Nth stage amplification core module. The Nth stage amplification core module outputs the current to the output interstage matching module. Then, it flows into the amplification core module connected to the output interstage matching module. The amplification core module outputs the current to the interstage matching module connected to it. Then, the current flows through each amplification unit in turn and finally flows out from the ground terminal of the last amplification unit. When the power supply is input from the output stage amplifier unit, the DC current flows out of the output matching module and then flows into the N-stage amplifier core module. The N-stage amplifier core module outputs current to the interstage matching module connected to the input stage amplifier unit. The interstage matching module outputs current to the first-stage amplifier core module. The first-stage amplifier core module outputs current to the output interstage matching module. The output interstage matching module outputs current to the core amplifier module connected to it. Then the current flows through each amplifier unit in turn and finally flows out from the ground terminal of the last amplifier unit. When the power supply is input from the intermediate-stage amplifying component, the DC current flows out from the output inter-stage matching module connected to the amplifying unit, and then flows into the amplifying core module connected to it. Then the current flows through each amplifying unit in turn, and is output from the amplifying core module in the last amplifying unit to the output matching module. The output matching module outputs current to the N-stage amplifying core module, and the N-stage amplifying core module outputs current to the inter-stage matching module in the last amplifying unit. Then, the current flows into the first-stage amplifying core module and flows out from the ground terminal of the first-stage amplifying core module.

8. The current multiplexing radio frequency amplifier circuit according to claim 1, characterized in that: The input stage amplifying unit, the output stage amplifying unit and the intermediate stage amplifying component include a differential form with dual input and dual output or a single-ended form with single input and single output.

9. A reconfigurable current multiplexing radio frequency amplifier circuit, characterized in that: It comprises a current multiplexing radio frequency amplifier circuit as claimed in any one of claims 1 to 8; The current output end of the input-stage amplifying unit is connected to the intermediate-stage amplifying component and the output-stage amplifying component via a first switch, and the current output end of the output-stage amplifying unit is connected to the intermediate-stage amplifying component and ground via a second switch. By controlling the on-off states of the first switch and the second switch, high- and low-gain switching of the circuit is achieved; The current output end of the output-stage amplifying unit is connected to the intermediate-stage amplifying component and the input-stage amplifying component via a first switch, and the current output end of the input-stage amplifying unit is connected to the intermediate-stage amplifying component and ground via a second switch. By controlling the on / off states of the first and second switches, high and low gain switching of the circuit is achieved; The current output end of the intermediate stage amplifying component is connected to the current input end of the output stage amplifying unit, and is connected to the current input end of the input stage amplifying unit and the ground through a first switch. At the same time, the current output end of the output stage amplifying unit is connected to the input stage amplifying unit and the ground through a second switch. By controlling the on-off state of the first switch and the second switch, high and low gain switching of the circuit is achieved.

10. The reconfigurable current multiplexing radio frequency amplifier circuit according to claim 9, characterized in that: When the power supply is input from the input-stage amplifying unit, when the first switch is turned on and the second switch is switched to be connected to the ground, the current output from the input-stage amplifying unit is divided by the intermediate-stage amplifying component and the output-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is turned off and the second switch is switched to be connected to the intermediate-stage amplifying component, the current output from the input-stage amplifying unit flows through the output-stage amplifying unit and the intermediate-stage amplifying component in sequence, and the circuit is in a high-gain state; When the power supply is input from the output stage amplifying unit, when the first switch is turned on and the second switch is controlled to be connected to the ground, the current output from the output stage amplifying unit is divided by the intermediate stage amplifying component and the input stage amplifying unit, and the circuit is in a low gain state; When the first switch is turned on and the second switch is switched to be connected to the intermediate stage amplifier component, the current output from the output stage amplifier unit flows through the input stage amplifier unit and the intermediate stage amplifier component in sequence, and the circuit is in a high gain state; When the power supply is input from the intermediate-stage amplifying component, when the first switch is turned on and the second switch control is switched to be connected to the ground, the current output from the intermediate-stage amplifying component is shunted by the output-stage amplifying unit and the input-stage amplifying unit, and the circuit is in a low-gain state; when the first switch is disconnected and the second switch control is switched to be connected to the output-stage amplifying unit, the current output from the intermediate-stage amplifying component flows through the output-stage amplifying unit and the input-stage amplifying unit in sequence, and the circuit is in a high-gain state.

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