A reconfigurable current multiplexing radio frequency amplifier circuit

Abstract

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

Description

TECHNICAL FIELD

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

[0002] In microwave, radio frequency, millimeter wave, terahertz and other high-frequency circuit systems, in order to reduce system power consumption, an amplifier design technology with low power consumption needs to be used. The current multiplexing technology is a widely used low-power amplifier design technology, which is characterized by two or more stages of amplifiers sharing the same current. It is equivalent to using the power consumption of a one-stage amplifier to achieve the gain of a two-stage or three-stage amplifier. Therefore, the current multiplexing technology can achieve a high-gain and low-power amplifier.

[0003] The existing Chinese patent with application number 202110437282.1, "A current multiplexing radio frequency amplifier circuit", discloses a four-turn on-chip coupling transformer and a three-turn on-chip coupling transformer structure, which adopts the gm-boost technology to ensure that the circuit has a low noise factor, a wide bandwidth and a high gain, and applies the current multiplexing technology, so that multiple cascaded units share one direct current power supply, effectively reducing the power consumption of the radio frequency amplifier, thereby reducing the power consumption cost of the system. However, this technical solution is power post, i.e., the power supply is placed in the last stage of the amplification unit, and the ground is placed in the first stage of the amplification unit, which will limit the linearity of the output stage (the last stage).

[0004] The Chinese patent with 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 stages of amplifiers, which are connected in series in the signal input direction. The amplifier connected with the signal input end is the first stage of amplifier, and the amplifier connected with the signal output end is the last stage of amplifier. The power supply end of the first stage of amplifier is connected with the positive end of the amplifier power supply, and the ground end of the last stage of amplifier is connected with the negative end of the amplifier power supply. For the adjacent two stages of amplifiers, the ground end of the former stage of amplifier is connected with the power supply end of the latter stage of amplifier. The amplifier power supply is used to supply power to the first stage of amplifier to generate a power supply current. The power supply current flows from the positive end of the amplifier power supply, through the at least two stages of amplifiers in turn, and then flows out from the ground end of the last stage of amplifier, and finally flows back to the negative end of the amplifier power supply. The present application can effectively improve the linearity of the current multiplexing amplifier. Although this technical solution is power pre, i.e., the power supply is placed in the first stage of the amplification unit, and the ground is placed in the last stage of the amplification unit, which improves the linearity, but at the same time, the power consumption also increases, and the power supply current I dc The last stage determines that the power consumption of the output stage is usually the largest, and the linearity limitation of the entire multi-stage amplifier may occur in the middle stage.

[0005] But in some applications (such as device standby or do not need high gain operation) need circuit can realize high and low gain switching, to reduce the running power consumption of the device, but the current multiplexing technology does not have the purpose of reconfigurable gain. SUMMARY

[0006] The present application aims to overcome the shortcomings of the prior art, and provides a reconfigurable current multiplexing radio frequency amplifier circuit, which solves the problems of the prior art.

[0007] The present application is achieved by the following technical solutions: a current multiplexing radio frequency amplifier circuit, comprising an input stage amplification unit and an output stage amplification unit, and further comprising 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 amplification unit, the direct current flows out from the input stage amplification unit, then flows into the power supply input end of the output stage amplification unit, and then the current flows out from the output stage amplification unit and flows into the intermediate stage amplification component, and finally flows out from the ground end of the intermediate stage amplification component;

[0009] When the power supply is input from the output stage amplification unit, the direct current flows out from the output stage amplification unit, then flows into the current input end of the input stage amplification unit, and then the current flows out from the input stage amplification unit and flows into the intermediate stage amplification component, and finally flows out from the ground end of the intermediate stage amplification component;

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

[0011] The intermediate stage amplification component comprises 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 into the first amplification unit, and then flows into the next cascaded amplification unit in turn, and finally flows out from the ground end of the last amplification unit;

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

[0013] The intermediate stage amplification assembly further comprises at least one non-amplification element, and any one non-amplification element is connected between any two amplification units.

[0014] When the power supply is input from the output stage amplification unit or the input stage amplification unit, the current output terminals of the input stage amplification unit and the output stage amplification unit are respectively connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

[0015] When the power supply is input from the intermediate stage amplification assembly, the current output terminals of the output stage amplification unit and the intermediate stage amplification assembly are respectively connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

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

[0017] When the power supply is input from the intermediate stage amplification assembly, the current output terminals of the N-2 amplification units and non-amplification elements are connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

[0018] The input stage amplification unit comprises an input matching module and a first stage amplification core module, the input matching module is connected with the first stage amplification core module, and the first stage amplification core module is connected with the intermediate stage amplification assembly.

[0019] The output stage amplification unit comprises an output matching module, an Nth stage amplification core module and an output inter-stage matching module, the output matching module is connected with the Nth stage amplification core module, the Nth stage amplification core module is connected with the output inter-stage matching module, and the output inter-stage matching module is connected with the intermediate stage amplification assembly.

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

[0021] When the power supply is input from the input stage amplification unit, the direct current flows from the interstage matching module connected with the first stage amplification core module to the first stage amplification core module, and then flows from the first stage amplification core module to the output matching module, and then flows from the output matching module to the Nth stage amplification core module, and then flows from the Nth stage amplification core module to the interstage matching module connected with the output stage amplification unit, and then flows from the interstage matching module to the amplification core module connected with the interstage matching module, and then flows from the amplification core module to the interstage matching module connected with the amplification core module, and then flows from the interstage matching module to each amplification unit in turn, and finally flows from the ground terminal of the last amplification unit.

[0022] When the power supply is input from the output stage amplification unit, the direct current flows from the output matching module, and then flows to the Nth stage amplification core module, and then flows from the Nth stage amplification core module to the interstage matching module connected with the input stage amplification unit, and then flows from the interstage matching module to the first stage amplification core module, and then flows from the first stage amplification core module to the interstage matching module connected with the output stage amplification unit, and then flows from the interstage matching module to the amplification core module connected with the interstage matching module, and then flows from the amplification core module to each amplification unit in turn, and finally flows from the ground terminal of the last amplification unit.

[0023] When the power supply is input from the intermediate stage amplification assembly, the direct current flows from the output interstage matching module connected with the amplification unit, and then flows to the amplification core module connected with the output interstage matching module, and then flows from the amplification core module to each amplification unit in turn, and then flows from the amplification core module in the last amplification unit to the output matching module, and then flows from the output matching module to the Nth stage amplification core module, and then flows from the Nth stage amplification core module to the interstage matching module in the last amplification unit, and then flows from the interstage matching module to the first stage amplification core module, and finally flows from the ground terminal of the first stage amplification core module.

[0024] The input stage amplification unit, the output stage amplification unit and the intermediate stage amplification assembly comprise a differential form of double-input and double-output or a single-ended form of single-input and single-output.

[0025] A reconfigurable current multiplexing radio frequency amplifier circuit comprises the current multiplexing radio frequency amplifier circuit.

[0026] The current output terminal of the input stage amplification unit is connected with the intermediate stage amplification assembly and the output stage amplification assembly through a first switch, and the current output terminal of the output stage amplification unit is connected with the intermediate stage amplification assembly and the ground through a second switch, and the on-off state of the first switch and the second switch is controlled to realize high-low gain switching of the circuit.

[0027] The current output end of the output stage amplification unit is connected with the intermediate stage amplification assembly and the input stage amplification assembly through a first switch, and the current output end of the input stage amplification unit is connected with the intermediate stage amplification assembly and the ground through a second switch, and the on-off state of the first switch and the second switch is controlled to realize high-low gain switching of the circuit.

[0028] The current output end of the intermediate stage amplification assembly is connected with the current input end of the output stage amplification unit, and is connected with the current input end of the input stage amplification unit and the ground through a first switch, and the current output end of the output stage amplification unit is connected with the input stage amplification unit and the ground through a second switch, and the on-off state of the first switch and the second switch is controlled to realize high-low gain switching of the circuit.

[0029] When the power supply is input from the input stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the input stage amplification unit is shunted by the intermediate stage amplification assembly and the output stage amplification 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 with the intermediate stage amplification assembly, the current output from the input stage amplification unit flows through the output stage amplification unit and the intermediate stage amplification assembly in turn, and the circuit is in a high gain state.

[0030] When the power supply is input from the output stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the output stage amplification unit is shunted by the intermediate stage amplification assembly and the input stage amplification 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 with the intermediate stage amplification assembly, the current output from the output stage amplification unit flows through the input stage amplification unit and the intermediate stage amplification assembly in turn, and the circuit is in a high gain state.

[0031] When the power supply is input from the intermediate stage amplification assembly, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the intermediate stage amplification assembly is shunted by the output stage amplification unit and the input stage amplification 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 with the output stage amplification unit, the current output from the intermediate stage amplification assembly flows through the output stage amplification unit and the input stage amplification unit in turn, and the circuit is in a high gain state.

[0032] The application has the following advantages: a reconfigurable current multiplexing radio frequency amplifier circuit, the power supply can be fed from any position of preposition, middle position and postposition, when fed from the preposition or the postposition, the ground position of the circuit can be placed on the intermediate stage, so that the linear degree and power consumption demand can be selected flexibly according to the linear degree and power consumption demand, and the gain reconfiguration of current multiplexing can be realized according to the actual application scene, the running power consumption of the circuit is reduced, and the gain dynamic adjustment is realized. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The schematic diagram of the principle structure of the power supply in front of the differential form of the present application;

[0034] Figure 2 The schematic diagram of the principle structure of the power supply in the rear of the differential form of the present application;

[0035] Figure 3 The schematic diagram of the principle structure of the power supply in the middle of the differential form of the present application;

[0036] Figure 4 The schematic diagram of the principle structure of the power supply in front of the single-ended form of the present application;

[0037] Figure 5 The schematic diagram of the principle structure of the power supply in the rear of the single-ended form of the present application;

[0038] Figure 6 The schematic diagram of the principle structure of the power supply in the middle of the single-ended form of the present application;

[0039] Figure 7 The schematic diagram of the circuit of the power supply in front of the differential form of the present application;

[0040] Figure 8 The schematic diagram of the circuit of the power supply in the rear of the differential form of the present application;

[0041] Figure 9 The schematic diagram of the circuit of the power supply in the middle of the differential form of the present application;

[0042] Figure 10 The schematic diagram of the reconfigurable principle structure of the power supply in front of the differential form of the present application;

[0043] Figure 11 The schematic diagram of the reconfigurable principle structure of the power supply in the rear of the differential form of the present application;

[0044] Figure 12 The schematic diagram of the reconfigurable principle structure of the power supply in the middle of the differential form of the present application;

[0045] Figure 13 The schematic diagram of the reconfigurable principle structure of the power supply in front of the single-ended form of the present application;

[0046] Figure 14 The schematic diagram of the reconfigurable principle structure of the power supply in the rear of the single-ended form of the present application;

[0047] Figure 15 The schematic diagram of the reconfigurable principle structure of the power supply in the middle of the single-ended form of the present application;

[0048] Figure 16 The schematic diagram of the reconfigurable circuit of the power supply in front of the differential form of the present application;

[0049] Figure 17 A schematic diagram of a reconfigurable circuit in a differential form with a power supply at the back for the present application;

[0050] Figure 18 A schematic diagram of a reconfigurable circuit in a differential form with a power supply at the middle for the present application. 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 described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in conjunction with the drawings of the present application is not intended to limit the protection scope of the claimed present application, but only represents 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 creative work fall within the protection scope of the present application. The present application will be further described below with reference to the drawings.

[0052] As Figures 1-3 shown, one of the embodiments of the present application relates to a current multiplexing radio frequency amplifier circuit, which comprises 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 double inputs and double outputs.

[0053] Among them, the current of the power supply V DD is input from the input stage amplification unit or the output stage amplification unit or the intermediate stage amplification component, that is, three feeding modes of power supply in front, back and middle.

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

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

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

[0057] When the power supply is input from the intermediate stage amplification assembly, the current flows out from the intermediate stage amplification assembly, then flows into the current input end of the output stage amplification unit, and then the current flows out from the output stage amplification unit, and then flows into the current output end of the input stage amplification unit, and finally flows out from the grounding end of the input stage amplification unit; at this time, the current output ends of the output stage amplification unit and the intermediate stage amplification assembly are respectively connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded. Or when the power supply is input from the intermediate stage amplification assembly, the direct current flows out from the intermediate stage amplification assembly, then flows into the current input end of the input stage amplification unit, and then the current flows out from the input stage amplification unit, and then flows into the current output end of the output stage amplification unit, and finally flows out from the grounding end of the output stage amplification unit.

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

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

[0060] Further, as shown in FIG. 6, another embodiment of the present application is to replace the differential form of double input and double output of the input stage amplification unit, the output stage amplification unit and the intermediate stage amplification assembly with the single-ended form of single input and single output on the basis of the above-mentioned embodiment, and other parts are consistent. Figures 4-6

[0061] ​Furthermore, this embodiment employs a three-stage amplification process. The input-stage amplification unit includes an input matching module and a first-stage amplification core module, which are connected to each other. The first-stage amplification core module is also 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 inter-stage output matching module, which are connected to each other. The third-stage amplification core module is connected to each other, and the inter-stage output matching module is also 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, which are connected to both the inter-stage and output inter-stage matching modules. The inter-stage matching module is also connected to the first-stage amplification core module.

[0062] Furthermore, the input matching module, output matching module, inter-stage matching module, and output inter-stage matching module are all transformers with 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, which is a differential common-source common-gate amplifier architecture, or other amplifier architectures such as common-source and common-gate can also be used.

[0063] Furthermore, such as Figure 7 As shown, when the power supply is input from the input stage amplification unit, the 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 current to the third stage amplification core module. The third stage amplification core module outputs current to the output interstage matching module, and then flows into the second stage amplification core module connected to the output interstage matching module. Finally, it flows out from the ground terminal of the second stage amplification core module.

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

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

[0066] The power supply of the present application can be fed from any position of front, middle and rear, when fed from the front or rear, the ground position of the circuit can be placed on the middle stage, so that the connection on the middle stage can be selected flexibly according to the linearity and power consumption requirements.

[0067] Another embodiment of the present application relates to a reconfigurable current multiplexing radio frequency amplifier circuit, which is implemented based on the current multiplexing radio frequency amplifier circuit described in the first embodiment, and the first switch and the second switch are added to the current multiplexing radio frequency amplifier circuit, and the input stage amplification unit, the output stage amplification unit and the intermediate stage amplification component are all in the differential form of double input and double output.

[0068] As shown in Figure 10 and Figure 16 , the current output end of the input stage amplification unit is connected with the intermediate stage amplification component and the output stage amplification component through the first single-pole single-throw control switch, and the current output end of the output stage amplification unit is connected with the intermediate stage amplification component and the ground through the second single-pole double-throw control switch, and the on-off state of the first switch and the second control switch is controlled to realize the high-low gain switching of the circuit.

[0069] Further, when the power supply is input from the input stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the input stage amplification unit is shunted by the intermediate stage amplification component and the output stage amplification 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 with the intermediate stage amplification component, the current output from the input stage amplification unit flows through the output stage amplification unit and the intermediate stage amplification component in turn, and the circuit is in a high gain state.

[0070] As shown in Figure 11 and Figure 17 , the current output end of the input stage amplification unit is connected with the intermediate stage amplification component and the output stage amplification component through the first single-pole single-throw control switch, and the current output end of the output stage amplification unit is connected with the intermediate stage amplification component and the ground through the second single-pole double-throw control switch, and the on-off state of the first switch and the second control switch is controlled to realize the high-low gain switching of the circuit.

[0071] Further, when the power supply is input from the output stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the output stage amplification unit is shunted by the intermediate stage amplification component and the input stage amplification 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 with the intermediate stage amplification component, the current output from the output stage amplification unit flows through the input stage amplification unit and the intermediate stage amplification component in turn, and the circuit is in a high gain state.

[0072] As shown in Figure 12 and Figure 18 , the current output end of the intermediate stage amplification component is connected with the current input end of the output stage amplification unit, and is connected with the current input end of the input stage amplification unit and the ground through the first switch, and the current output end of the output stage amplification unit is connected with the input stage amplification unit and the ground through the second switch, by controlling the on-off state of the first switch and the second switch, the high-low gain switching of the circuit is realized.

[0073] Further, when the power supply is input from the intermediate stage amplification component, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the intermediate stage amplification component is shunted by the output stage amplification unit and the input stage amplification 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 with the output stage amplification unit, the current output from the intermediate stage amplification component flows through the output stage amplification unit and the input stage amplification unit in turn, and the circuit is in a high gain state.

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

[0075] The present application switches the circuit between high gain and low gain states by controlling the first switch and the second switch, so as to cope with different use scenarios, realize 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 above description is only the preferred embodiment of the present application, and it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and improvements, and can be modified by the above teaching or related technical or knowledge within the scope of the concept described herein. Any modification and change made by the person skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the appended claims of the present application.

Claims

1. A current- multiplexed radio frequency amplifier circuit comprising an input stage amplifying unit and an output stage amplifying unit, characterized in that: The intermediate stage amplification assembly is further provided; 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; When the power supply is input from the input stage amplification unit, the direct current flows out of the input stage amplification unit, then flows into the power supply input end of the output stage amplification unit, then flows out of the output stage amplification unit, then flows into the intermediate stage amplification assembly, and finally flows out of the ground end of the intermediate stage amplification assembly; When the power supply is input from the output stage amplification unit, the direct current flows out of the output stage amplification unit, then flows into the current input end of the input stage amplification unit, then flows out of the input stage amplification unit, then flows into the intermediate stage amplification assembly, and finally flows out of the ground end of the intermediate stage amplification assembly; When the power supply is input from the intermediate stage amplification assembly, the direct current flows out of the intermediate stage amplification assembly, then flows into the current input end of the output stage amplification unit, then flows out of the output stage amplification unit, then flows into the current output end of the input stage amplification unit, and finally flows out of the ground end of the input stage amplification unit; or when the power supply is input from the intermediate stage amplification assembly, the direct current flows out of the intermediate stage amplification assembly, then flows into the current input end of the input stage amplification unit, then flows out of the input stage amplification unit, then flows into the current output end of the output stage amplification unit, and finally flows out of the ground end of the output stage amplification unit.

2. A current-reused radio frequency amplifier circuit as claimed in claim 1, characterized in that: The intermediate stage amplification assembly comprises 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 into the first amplification unit, then flows into the next cascaded amplification unit, and finally flows out of the ground end of the last amplification unit, wherein N is an integer greater than or equal to 3; When the power supply is input from the intermediate stage amplification assembly, the current flows into the amplification unit at one end of the intermediate stage amplification assembly, then flows into the next cascaded amplification unit, and finally flows out of the last amplification unit to the output stage amplification unit.

3. A current-reused radio frequency amplifier circuit as claimed in claim 2, characterized in that: The intermediate stage amplification assembly further comprises at least one non-amplification element, and any non-amplification element is connected between any two amplification units.

4. A current-reused radio frequency amplifier circuit according to claim 1, wherein: When the power supply is input from the output stage amplification unit or the input stage amplification unit, the current output ends of the input stage amplification unit and the output stage amplification unit are respectively connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded; When the power supply is input from the intermediate stage amplification assembly, the current output ends of the output stage amplification unit and the intermediate stage amplification assembly are respectively connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

5. A current-reused radio frequency amplifier circuit as claimed in claim 3, characterized in that: When the power supply is input from the output stage amplification unit or the input stage amplification unit, the current output ends of all the amplification units and non-amplification elements except the last amplification unit in the N-2 amplification units are connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded; the current output end of the last amplification unit is grounded; When the power supply is input from the intermediate stage amplification assembly, the current output ends of the N-2 amplification units and non-amplification elements are connected with a decoupling capacitor, and the other end of the decoupling capacitor is grounded.

6. A current- multiplexed radio frequency amplifier circuit according to claim 1, characterized in that: The input stage amplification unit comprises an input matching module and a first stage amplification core module, the input matching module is connected with the first stage amplification core module, and the first stage amplification core module is connected with the intermediate stage amplification assembly; The output stage amplification unit comprises an output matching module, an Nth stage amplification core module and an output interstage matching module, the output matching module is connected with the Nth stage amplification core module, the Nth stage amplification core module is connected with the output interstage matching module, and the output interstage matching module is connected with the intermediate stage amplification assembly, wherein N is an integer greater than or equal to 3; The intermediate stage amplification assembly comprises N-2 cascaded amplification units, each amplification unit comprises an amplification core module and an interstage matching module, the first stage amplification core module is connected with the interstage matching module of the first amplification unit, and the core amplification module of the last amplification unit is connected with the output interstage matching module.

7. A current- multiplexed radio frequency amplifier circuit according to claim 6, characterized in that: When the power supply is input from the input stage amplification unit, the direct current flows from the interstage matching module connected with the first stage amplification core module to the first stage amplification core module, the current flows out of the first stage amplification core module and then 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, the current then flows into the amplification core module connected with the output interstage matching module, the amplification core module outputs the current to the interstage matching module connected therewith, and then the current flows through each amplification unit in turn and finally flows out of the grounding end of the last amplification unit; When the power supply is input from the output stage amplification unit, the direct current flows out of the output matching module and then flows into the Nth stage amplification core module, the Nth stage amplification core module outputs the current to the interstage matching module connected with the input stage amplification unit, the interstage matching module outputs the current to the first stage amplification core module, the first stage amplification core module outputs the current to the output interstage matching module, the output interstage matching module outputs the current to the core amplification module connected therewith, and then the current flows through each amplification unit in turn and finally flows out of the grounding end of the last amplification unit; When the power supply is input from the intermediate stage amplification assembly, the direct current flows out of the output interstage matching module connected with the amplification unit and then flows into the amplification core module connected therewith, and then the current flows through each amplification unit in turn, is output from the amplification core module in the last amplification unit to 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 interstage matching module in the last amplification unit, and then the current flows into the first stage amplification core module and flows out of the grounding end of the first stage amplification core module.

8. A current- multiplexed radio frequency amplifier circuit according to claim 1, characterized in that: The input stage amplification unit, the output stage amplification unit and the intermediate stage amplification assembly comprise a differential form with double inputs and double outputs or a single-ended form with single input and single output.

9. A reconfigurable current- multiplexed radio frequency amplifier circuit, characterized by: It comprises the current multiplexing radio frequency amplifier circuit as claimed in any one of claims 1-8; It comprises the current multiplexing radio frequency amplifier circuit as claimed in any one of claims 1-8; The current output end of the input stage amplification unit is connected with the intermediate stage amplification assembly and the output stage amplification assembly through a first switch, and the current output end of the output stage amplification unit is connected with the intermediate stage amplification assembly and the ground through a second switch, and the on-off state of the first switch and the second switch is controlled to realize high-low gain switching of the circuit. The current output end of the input stage amplification unit is connected with the intermediate stage amplification assembly and the output stage amplification assembly through a first switch, and the current output end of the output stage amplification unit is connected with the intermediate stage amplification assembly and the ground through a second switch, and the on-off state of the first switch and the second switch is controlled to realize high-low gain switching of the circuit. The current output end of the intermediate stage amplification assembly is connected with the current input end of the output stage amplification unit, and is connected with the current input end of the input stage amplification unit and the ground through a first switch, and the current output end of the output stage amplification unit is connected with the input stage amplification unit and the ground through a second switch, and the on-off state of the first switch and the second switch is controlled to realize high-low gain switching of the circuit.

10. A reconfigurable current-multiplying RF amplifier circuit according to claim 9, characterized in that: When the power supply is input from the input stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the input stage amplification unit is shunted by the intermediate stage amplification assembly and the output stage amplification 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 with the intermediate stage amplification assembly, the current output from the input stage amplification unit flows through the output stage amplification unit and the intermediate stage amplification assembly in turn, and the circuit is in a high gain state; When the power supply is input from the output stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the output stage amplification unit is shunted by the intermediate stage amplification assembly and the input stage amplification 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 with the intermediate stage amplification assembly, the current output from the output stage amplification unit flows through the input stage amplification unit and the intermediate stage amplification assembly in turn, and the circuit is in a high gain state; When the power supply is input from the output stage amplification unit, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the output stage amplification unit is shunted by the intermediate stage amplification assembly and the input stage amplification 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 with the intermediate stage amplification assembly, the current output from the output stage amplification unit flows through the input stage amplification unit and the intermediate stage amplification assembly in turn, and the circuit is in a high gain state. When the power supply is input from the intermediate stage amplification assembly, when the first switch is turned on and the second switch is switched to be connected with the ground, the current output from the intermediate stage amplification assembly is shunted by the output stage amplification unit and the input stage amplification 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 with the output stage amplification unit, the current output from the intermediate stage amplification assembly flows through the output stage amplification unit and the input stage amplification unit in turn, and the circuit is in a high gain state.

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