Circuit for driving passive mixer to perform up-conversion and electronic equipment

Abstract

The invention relates to the technical field of communication, and discloses a circuit for driving a passive mixer to perform up-conversion and electronic equipment, common-mode voltage of differential signals is adjusted through a common-mode feedback adjusting network, and the adjusted voltage flows to a common-mode voltage control circuit; a driving control circuit outputs a driving control signal according to the differential signal, so that the passive mixer works; and the common-mode voltage control circuit outputs a voltage control signal according to the adjusted voltage and the reference voltage, so that the common-mode feedback adjustment network controls the common-mode voltage to be in a voltage stabilization state. Therefore, the passive mixer can be accurately driven by processing the differential signal through the driving control circuit, so that the mixing gain of the passive mixer can be improved based on the driving control of the driving control circuit; and the stability of the differential signal can be improved by arranging the common-mode feedback adjustment network and the common-mode voltage control circuit, so that the influence degree on the noise, bandwidth and linearity of the frequency mixing system can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a circuit and electronic equipment for driving a passive mixer to perform up-conversion. Background Art

[0002] As wireless network speeds increase, the performance requirements of analog and RF systems in wireless networks also increase. Specifically, analog and RF systems need to achieve higher linearity and wider bandwidth—for example, the bandwidth required for wifi6 / wifi7 is 320MHz, and the EVM requirement is above -38dB. At present, passive mixers are usually used in mixers in the transmission channel of integrated circuits, and the passive mixer itself has a low gain. The existing solution mainly relies on the architecture of Active-LPF (active low-pass filter) plus passive mixer, specifically: the input signal is filtered through Active-LPF so that the filtered signal can drive the passive mixer to work (such as up-conversion).

[0003] However, practice has found that in the Active-LPF plus passive mixer architecture, the Active-LPF will affect the noise, bandwidth and linearity of the mixing system (e.g., additional noise may be introduced when filtering unnecessary frequency components, the bandwidth of the mixer may be limited when reducing interference by limiting the frequency range of the signal, and the filtering process may cause signal distortion and affect the linear performance of the mixer, etc.), resulting in unsatisfactory channel performance; at the same time, in order to increase the gain of the passive mixer, this architecture requires a large current, which is not conducive to performance. It can be seen that it is particularly important to propose a technical solution that increases the gain of the passive mixer while reducing the impact on the noise, bandwidth and linearity of the mixing system. Summary of the invention

[0004] The present invention provides a circuit and electronic equipment for driving a passive mixer for up-conversion, which can improve the driving accuracy of the passive mixer, help improve the gain of the passive mixer and reduce the influence on the noise, bandwidth and linearity of the mixing system.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a circuit for driving a passive mixer to perform up-conversion, the circuit comprising a driving circuit, and the driving circuit comprising a common-mode feedback adjustment network, a common-mode voltage control circuit and a driving control circuit, wherein:

[0006] The first end of the common-mode feedback adjustment network is electrically connected to the first end of the drive control circuit and is used to access the first input signal. The second end of the common-mode feedback adjustment network is electrically connected to the second end of the drive control circuit and is used to access the second input signal. The third end of the common-mode feedback adjustment network is electrically connected to the first end of the common-mode voltage control circuit. The third end of the drive control circuit is electrically connected to the second end of the common-mode voltage control circuit. The fourth end of the drive control circuit is electrically connected to the third end of the common-mode voltage control circuit. The fifth end of the drive control circuit is used to electrically connect to a passive mixer, and the passive mixer is used to electrically connect to a radio frequency circuit. The fourth end of the common-mode voltage control circuit is used to access a reference voltage. The fourth end of the common-mode feedback adjustment network, the fifth end of the common-mode voltage control circuit and the sixth end of the drive control circuit are used to electrically connect to a power supply. The first input signal and the second input signal constitute a differential signal.

[0007] The common-mode feedback adjustment network is used for, when the first input signal and the second input signal are connected, making the first input signal and the second input signal flow to the drive control circuit and the common-mode voltage control circuit, and adjusting the common-mode voltage generated by the first input signal and the second input signal to obtain an adjusted common-mode voltage, and making the adjusted common-mode voltage flow to the common-mode voltage control circuit through the drive control circuit;

[0008] The driving control circuit is used to output a driving control signal for the passive mixer according to the first input signal and the second input signal, so as to enable the passive mixer to work;

[0009] The common-mode voltage control circuit is used to output a voltage control signal for the common-mode feedback adjustment network according to the received adjusted common-mode voltage and the reference voltage;

[0010] The common-mode feedback adjustment network is also used to control the common-mode voltage to be in a stable state according to the received voltage control signal.

[0011] As an optional implementation, in the first aspect of the present invention, the common mode voltage control circuit includes a common mode voltage detection module and a voltage amplification module, wherein:

[0012] The first end of the common-mode voltage detection module is electrically connected to the third end of the drive control circuit, the second end of the common-mode voltage detection module is electrically connected to the fourth end of the drive control circuit, the third end of the common-mode voltage detection module is electrically connected to the first input end of the voltage amplification module and is used to be electrically connected to the power supply, the second input end of the voltage amplification module is used to be electrically connected to the reference voltage, and the output end of the voltage amplification module is electrically connected to the third end of the common-mode feedback adjustment network;

[0013] The common-mode voltage detection module is used to detect the adjusted common-mode voltage, and pass the adjusted common-mode voltage to the voltage amplification module, and trigger the voltage amplification module to perform operational amplifier processing on the adjusted common-mode voltage according to the connected reference voltage to obtain a voltage control signal for the common-mode feedback adjustment network.

[0014] As an optional implementation, in the first aspect of the present invention, the common mode voltage detection module includes a first resistor, a second resistor, a first capacitor and a second capacitor, wherein:

[0015] One end of the first resistor and one end of the first capacitor are electrically connected to the third end of the drive control circuit, one end of the second resistor and one end of the second capacitor are electrically connected to the fourth end of the drive control circuit, and the other end of the first resistor, the other end of the first capacitor, the other end of the second resistor and the other end of the second capacitor are all electrically connected to the first input end of the voltage amplification module and are used to electrically connect to the power supply.

[0016] As an optional implementation, in the first aspect of the present invention, the common-mode voltage control circuit further includes a common-mode voltage compensation module, and the common-mode voltage compensation module includes a third resistor and a third capacitor, wherein:

[0017] One end of the third resistor is electrically connected to the other end of the first resistor, the other end of the first capacitor, the other end of the second resistor and the other end of the second capacitor respectively, the other end of the third resistor is electrically connected to one end of the third capacitor, and the other end of the third capacitor is used to be electrically connected to the power supply;

[0018] The common-mode voltage compensation module is used to perform voltage compensation on the adjusted common-mode voltage so as to make the voltage flowing through each component of the common-mode voltage control circuit constant.

[0019] As an optional implementation, in the first aspect of the present invention, the drive control circuit includes a first drive control module and a second drive control module, the first drive control module includes a first source follower, a first auxiliary amplifier and a first current regulation module, and the second drive control module includes a second source follower, a second auxiliary amplifier and a second current regulation module, wherein:

[0020] The first end of the first source follower and the first end of the first auxiliary amplifier are both electrically connected to the first end of the common-mode feedback adjustment network, the second end of the second source follower and the first end of the second auxiliary amplifier are both electrically connected to the second end of the common-mode feedback adjustment network, the second end of the first source follower and the second end of the second source follower are both used to electrically connect to the passive mixer, the second end of the first auxiliary amplifier is electrically connected to one end of the first resistor in the common-mode voltage control circuit and the first end of the first current regulation module, the second end of the second auxiliary amplifier is electrically connected to one end of the second resistor in the common-mode voltage control circuit and the first end of the second current regulation module, the third end of the first source follower, the third end of the second source follower, the second end of the first current regulation module and the second end of the second current regulation module are all used to electrically connect to the power supply, and the fourth end of the first source follower, the fourth end of the second source follower, the third end of the first auxiliary amplifier and the third end of the second auxiliary amplifier are all used to be grounded;

[0021] The first driving control module is used to output a first driving control signal for the passive mixer according to the first input signal;

[0022] The second driving control module is used to output a second driving control signal for the passive mixer according to the second input signal, wherein the driving control signal includes the first driving control signal and the second driving control signal.

[0023] As an optional implementation, in the first aspect of the present invention, the common-mode feedback adjustment network includes a voltage feedback module, a third current regulation module and a fourth current regulation module, wherein:

[0024] The first end of the voltage feedback module is electrically connected to the first end of the first source follower, the first end of the first auxiliary amplifier and the first end of the third current regulation module, and is used to access a first input signal. The second end of the voltage feedback module is electrically connected to the second end of the second source follower, the first end of the second auxiliary amplifier and the first end of the fourth current regulation module, and is used to access a second input signal. The third end of the voltage feedback module is electrically connected to the output end of the voltage amplification module in the common-mode voltage control circuit. The second end of the third current regulation module and the second end of the fourth current regulation module are both used to electrically connect to the power supply. The fourth end of the voltage feedback module is used to be grounded.

[0025] The voltage feedback module is used to control the components of the drive control circuit to operate in a constant current region according to the current provided by the third current regulation module and the fourth current regulation module.

[0026] As an optional implementation, in the first aspect of the present invention, the circuit further includes a voltage bias circuit, and the voltage bias circuit is used to control each component in the driving circuit to be at a desired working potential, wherein the voltage bias circuit includes a filtering attenuation module, a fifth current regulating module and a sixth current regulating module, wherein:

[0027] The first end of the filter attenuation circuit is electrically connected to the first end of the fifth current regulation module and the first end of the voltage feedback module in the drive circuit, and is used to access the first input signal. The second end of the filter attenuation circuit is electrically connected to the first end of the sixth current regulation module and the second end of the voltage feedback module in the drive circuit, and is used to access the second input signal. The second end of the fifth current regulation module and the second end of the sixth current regulation module are both used for grounding.

[0028] As an optional embodiment, in the first aspect of the present invention, the circuit also includes the passive mixer, wherein the first end of the passive mixer is electrically connected to the second end of the first source follower, the second end of the passive mixer is electrically connected to the second end of the second source follower, the third end of the passive mixer is used to access the local oscillator signal, and the fourth end of the passive mixer is used to electrically connect to the radio frequency circuit.

[0029] As an optional implementation, in the first aspect of the present invention, the number of the circuits is greater than 1, the circuits further include an adder, and each of the circuits is connected in parallel through the adder, wherein:

[0030] The fourth end of the passive mixer is electrically connected to the first end of the adder, and the second end of the adder is used to electrically connect to the radio frequency circuit.

[0031] A second aspect of the present invention discloses an electronic device, the electronic device comprising a device body, and the electronic device further comprising the circuit for driving a passive mixer to perform up-conversion as described in any one of the first aspect of the present invention.

[0032] The implementation of the present invention has the following beneficial effects:

[0033] The present invention provides a circuit for driving a passive mixer to perform up-conversion. The circuit for driving a passive mixer to perform up-conversion includes a driving circuit, and the driving circuit includes a common-mode feedback adjustment network, a common-mode voltage control circuit and a driving control circuit, wherein a first end of the common-mode feedback adjustment network is electrically connected to a first end of the driving control circuit and is used to access a first input signal, a second end of the common-mode feedback adjustment network is electrically connected to a second end of the driving control circuit and is used to access a second input signal, a third end of the common-mode feedback adjustment network is electrically connected to a first end of the common-mode voltage control circuit, a third end of the driving control circuit is electrically connected to a second end of the common-mode voltage control circuit, a fourth end of the driving control circuit is electrically connected to a third end of the common-mode voltage control circuit, a fifth end of the driving control circuit is used to electrically connect to a passive mixer, and the passive mixer is used to electrically connect to a radio frequency circuit, a fourth end of the common-mode voltage control circuit is used to access a reference voltage, a fourth end of the common-mode feedback adjustment network, a common-mode The fifth end of the voltage control circuit and the sixth end of the drive control circuit are used to electrically connect to the power supply, and the first input signal and the second input signal constitute a differential signal; the common-mode feedback adjustment network is used to, when the first input signal and the second input signal are connected, direct the first input signal and the second input signal to the drive control circuit and the common-mode voltage control circuit, and adjust the common-mode voltage generated by the first input signal and the second input signal to obtain the adjusted common-mode voltage, and direct the adjusted common-mode voltage to the common-mode voltage control circuit through the drive control circuit; the drive control circuit is used to output a drive control signal for the passive mixer according to the first input signal and the second input signal, so as to enable the passive mixer to work; the common-mode voltage control circuit is used to output a voltage control signal for the common-mode feedback adjustment network according to the received adjusted common-mode voltage and the reference voltage; the common-mode feedback adjustment network is also used to control the common-mode voltage to be in a stable state according to the received voltage control signal. It can be seen that the present invention arranges a driving circuit (the driving circuit includes a common-mode feedback adjustment network, a common-mode voltage control circuit and a driving control circuit) before the passive mixer. Specifically, the driving control signal output by the driving control circuit realizes precise driving of the passive mixer, which is beneficial to improving the mixing gain of the passive mixer based on the driving control of the driving control circuit, and is beneficial to reducing the gain loss of the passive mixer; and the voltage limitation of the differential signal input to the driving control circuit by the common-mode voltage control circuit and the common-mode feedback adjustment network is beneficial to improving the stability of the differential signal, thereby facilitating improving the linearity of the output driving control signal, and further facilitating reducing the influence of the high-linear driving control signal on the noise, bandwidth and linearity of the mixing system where the passive mixer is located, that is, reducing the noise brought by the output end of the passive mixer, expanding the bandwidth of the passive mixer and improving the linearity of the passive mixer through hardware. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 It is a schematic structural diagram of a circuit for driving a passive mixer to perform up-conversion according to an embodiment of the present invention;

[0036] Figure 2 It is a schematic structural diagram of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention;

[0037] Figure 3 It is a schematic diagram of another circuit structure for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention;

[0038] Figure 4 It is a schematic diagram of the relationship between voltage attenuation and bandwidth characteristics of a source follower-based passive mixer architecture disclosed in an embodiment of the present invention;

[0039] Figure 5 It is a schematic diagram of the relationship between the output linearity of a source follower and the output linearity of a passive mixer disclosed in an embodiment of the present invention;

[0040] Figure 6 It is a schematic diagram of the relationship between the output impedance characteristics of a source follower-based passive mixer architecture disclosed in an embodiment of the present invention;

[0041] Figure 7 It is a structural schematic diagram of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention;

[0042] Figure 8 It is a structural schematic diagram of a voltage bias circuit disclosed in an embodiment of the present invention;

[0043] Fig. 9 It is a structural schematic diagram of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention;

[0044] Fig.10 It is a schematic diagram of the overall structure of a circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention;

[0045] Fig.11 It is a schematic diagram of the overall structure of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention;

[0046] Fig.12It is a schematic structural diagram of a passive mixer disclosed in an embodiment of the present invention;

[0047] Fig.13 It is a structural schematic diagram of an electronic device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Embodiment 1

[0051] See also Figure 1 , Figure 1 is a schematic diagram of a circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention, wherein: Figure 1 The circuit for driving the passive mixer to perform up-conversion can be applied to electronic products (such as analog and radio frequency system products) that drive the passive mixer 20 to perform up-conversion, and the embodiments of the present invention are not limited thereto. Figure 1 As shown, the circuit for driving the passive mixer to perform up-conversion may include a driving circuit 10, and the driving circuit 10 includes a common-mode feedback adjustment network 101, a common-mode voltage control circuit 102 and a driving control circuit 103, wherein:

[0052] A first end of the common-mode feedback adjustment network 101 is electrically connected to a first end of the drive control circuit 103 and is used to access a first input signal. A second end of the common-mode feedback adjustment network 101 is electrically connected to a second end of the drive control circuit 103 and is used to access a second input signal. A third end of the common-mode feedback adjustment network 101 is electrically connected to a first end of the common-mode voltage control circuit 102. A third end of the drive control circuit 103 is electrically connected to a second end of the common-mode voltage control circuit 102. A fourth end of the drive control circuit 103 is electrically connected to a third end of the common-mode voltage control circuit 102. A fifth end of the drive control circuit 103 is used to electrically connect to a passive mixer 20. The passive mixer 20 is used to electrically connect to a radio frequency circuit 30. A fourth end of the common-mode voltage control circuit 102 is used to access a reference voltage. A fourth end of the common-mode feedback adjustment network 101, a fifth end of the common-mode voltage control circuit 102 and a sixth end of the drive control circuit 103 are used to electrically connect to a power supply.

[0053] The common-mode feedback adjustment network 101 is used for, when the first input signal and the second input signal are connected, to make the first input signal and the second input signal flow to the drive control circuit 103 and the common-mode voltage control circuit 102, and to adjust the common-mode voltage generated by the first input signal and the second input signal to obtain the adjusted common-mode voltage, and to make the adjusted common-mode voltage flow to the common-mode voltage control circuit 102 through the drive control circuit 103;

[0054] The driving control circuit 103 is used to output a driving control signal for the passive mixer 20 according to the first input signal and the second input signal, so as to enable the passive mixer 20 to work;

[0055] The common mode voltage control circuit 102 is used to output a voltage control signal for the common mode feedback adjustment network 101 according to the received adjusted common mode voltage and reference voltage;

[0056] The common-mode feedback adjustment network 101 is also used to control the common-mode voltage to be in a stable state according to the received voltage control signal.

[0057] In an embodiment of the present invention, the drive control circuit 103 may be a circuit composed of a plurality of source followers. Specifically, the source follower may be a source follower based on a PMOS tube or a source follower based on an NMOS tube. The first input signal and the second input signal constitute a differential signal. Specifically, when the first input signal is a forward input signal, the second input signal is a reverse input signal; when the first input signal is a reverse input signal, the second input signal is a forward input signal. Optionally, the differential signal constituted by the first input signal and the second input signal may be a signal of an in-phase component, that is, a signal that is in phase with a reference signal, or may be a signal of an orthogonal component, that is, a signal that is 90 degrees out of phase with the reference signal, which is not limited in the embodiment of the present invention.

[0058] It can be seen that the implementation Figure 1 The described circuit for driving a passive mixer for up-conversion can, when a first input signal and a second input signal are connected, direct the first input signal and the second input signal to a driving control circuit 103 and a common-mode voltage control circuit 102 through a common-mode feedback adjustment network 101, and adjust the common-mode voltage generated by the first input signal and the second input signal to obtain an adjusted common-mode voltage, and direct the adjusted common-mode voltage to the common-mode voltage control circuit 102 through the driving control circuit 103; and output a driving control signal for the passive mixer 20 according to the first input signal and the second input signal through the driving control circuit 103 for the passive mixer 20 to work; output a voltage control signal for the common-mode feedback adjustment network 101 according to the received adjusted common-mode voltage and a reference voltage through the common-mode voltage control circuit 102; and then control the common-mode voltage to be in a stable state according to the received voltage control signal through the common-mode feedback adjustment network 101, so as to achieve the above-described circuit. Circuit 10 (driving circuit 10 includes common-mode feedback adjustment network 101, common-mode voltage control circuit 102 and driving control circuit 103), that is, the driving control signal output by the driving control circuit 103 realizes precise driving of the passive mixer 20, which is beneficial to improving the mixing gain of the passive mixer 20 based on the driving control of the driving control circuit 103, and is beneficial to reducing the gain loss of the passive mixer 20; and the voltage limitation of the differential signal input to the driving control circuit 103 by the common-mode voltage control circuit 102 and the common-mode feedback adjustment network 101 is beneficial to improving the stability of the common-mode voltage of the differential signal, thereby facilitating improving the linearity of the output driving control signal, and further facilitating reducing the influence of the noise, bandwidth and linearity of the mixing system where the passive mixer 20 is located based on the high-linearity driving control signal, that is, reducing the noise brought by the output end of the passive mixer 20, expanding the bandwidth of the passive mixer 20 and improving the linearity of the passive mixer 20 through hardware.

[0059] In an optional embodiment, if Figure 2 As shown, Figure 2 is a schematic diagram of the structure of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention, such as Figure 2 As shown, the common mode voltage control circuit 102 includes a common mode voltage detection module 1021 and a voltage amplifier module 1022, wherein:

[0060] A first end of the common-mode voltage detection module 1021 is electrically connected to a third end of the drive control circuit 103, a second end of the common-mode voltage detection module 1021 is electrically connected to a fourth end of the drive control circuit 103, a third end of the common-mode voltage detection module 1021 is electrically connected to a first input end of a voltage amplifier module 1022, and is used to electrically connect to a power supply, a second input end of the voltage amplifier module 1022 is used to electrically connect to a reference voltage, and an output end of the voltage amplifier module 1022 is electrically connected to a third end of the common-mode feedback adjustment network 101;

[0061] The common-mode voltage detection module 1021 is used to detect the adjusted common-mode voltage, and to pass the adjusted common-mode voltage to the voltage amplifier module 1022, and to trigger the voltage amplifier module 1022 to perform amplifier processing on the adjusted common-mode voltage according to the connected reference voltage to obtain a voltage control signal for the common-mode feedback adjustment network 101. Among them, the common-mode voltage to be detected by the common-mode voltage detection module 1021 is the voltage between the third terminal of the drive control circuit 103 and the fourth terminal of the drive control circuit 103. It should be noted that when the common-mode voltage detection module 1021 is the above-mentioned common-mode voltage provided by the voltage amplifier module 1022, the common-mode voltage can only be used to input into the voltage amplifier module 1022 for comparison with the reference voltage, that is, the common-mode voltage can be used not as the power supply voltage of the voltage amplifier module 1022, but the voltage provided by the power supply is used to power the voltage amplifier module 1022.

[0062] It can be seen that this optional embodiment can detect the adjusted common-mode voltage through the common-mode voltage detection module 1021, and pass the adjusted common-mode voltage to the voltage operational amplifier module 1022, and compare the adjusted common-mode voltage with the reference voltage through the voltage operational amplifier module 1022 to obtain a voltage control signal for the common-mode feedback adjustment network 101. The detection accuracy of the adjusted common-mode voltage can be improved through the common-mode voltage detection module 1021, so that the accurately detected common-mode voltage can be accurately compared with the reference voltage through the voltage operational amplifier module 1022 to obtain a voltage control signal for the common-mode feedback adjustment network 101, which is beneficial to improving the accuracy and reliability of the voltage control signal obtained by comparison, and is beneficial to feeding back the generated accurate voltage control signal to the common-mode feedback adjustment network 101 to achieve voltage regulation control of the common-mode voltage, and further beneficial to improving the stability of the common-mode voltage.

[0063] In this optional embodiment, as an optional implementation, as Figure 3 As shown, Figure 3 is a schematic diagram of the structure of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention, such as Figure 3 As shown, the common mode voltage detection module 1021 includes a first resistor R SP , the second resistor R SN, the first capacitor C SP And the second capacitor C SN ,in:

[0064] The first resistor R SP One end and the first capacitor C SP One end of the second resistor R is electrically connected to the third end of the drive control circuit 103. SN One end and the second capacitor C SN One end of the first resistor R is electrically connected to the fourth end of the drive control circuit 103. SP The other end of the first capacitor C SP The other end of the second resistor R SN The other end and the second capacitor C SN The other end is electrically connected to the first input end of the voltage amplifier module 1022 and is used to electrically connect to the power supply.

[0065] In the embodiment of the present invention, Figure 3 As shown, the voltage operational amplifier module 1022 includes an operational amplifier OP1, wherein a first input terminal of the operational amplifier OP1 is electrically connected to a first resistor R SP The other end of the first capacitor C SP The other end of the second resistor R SN The other end and the second capacitor C SN The other end of the operational amplifier OP1 is used to access the reference voltage (i.e. Figure 3 The output terminal of the operational amplifier OP1 is electrically connected to the third terminal of the common-mode feedback adjustment network 101. Specifically, when the first input terminal of the operational amplifier OP1 is a non-inverting input terminal, the second input terminal of the operational amplifier OP1 is an inverting input terminal; when the first input terminal of the operational amplifier OP1 is an inverting input terminal, the second input terminal of the operational amplifier OP1 is a non-inverting input terminal.

[0066] It should be noted at this point that when the first input signal and the second input signal input into the driving circuit 10 are low-frequency signals, the common-mode voltage generated by the low-frequency signal can be filtered out and the DC signal can be prevented from passing through by the resistor and capacitor in the common-mode voltage detection module 1021. This can reduce the passing capacity of low-frequency signals and increase the passing capacity of medium and high-frequency signals. The filtering effect achieved by the parallel connection of the resistor and capacitor in the common-mode voltage detection module 1021 can smooth the output signal and avoid large fluctuations in the signal.

[0067] In this optional embodiment, as another optional implementation, as Figure 2 As shown, the common mode voltage control circuit 102 also includes a common mode voltage compensation module 1023, and Figure 3 As shown, the common mode voltage compensation module 1023 includes a third resistor REPN And the third capacitor C EPN ,in:

[0068] The third resistor R EPN One end of each resistor R SP The other end of the first capacitor C SP The other end of the second resistor R SN The other end and the second capacitor C SN The other end is electrically connected to the third resistor R EPN The other end is electrically connected to a third capacitor C EPN One end of the third capacitor C EPN The other end is used for electrically connecting to a power supply;

[0069] The common-mode voltage compensation module 1023 is used to perform voltage compensation on the adjusted common-mode voltage so as to make the voltage of each component flowing through the common-mode voltage control circuit 102 constant. In this way, the current of the drive circuit 10 can be limited by the series connection of the resistor and the capacitor in the common-mode voltage compensation module 1023, so as to limit the voltage of the drive circuit 10 within the constant voltage range, which is conducive to accurately limiting the common-mode voltage by controlling the current, thereby avoiding damage to the drive circuit 10 caused by excessive or too small voltage.

[0070] In another optional embodiment, Figure 2 As shown, the driving control circuit 103 includes a first driving control module 1031 and a second driving control module 1032. The first driving control module 1031 includes a first source follower 10311, a first auxiliary amplifier 10312 and a first current regulating module 10313. The second driving control module 1032 includes a second source follower 10321, a second auxiliary amplifier 10322 and a second current regulating module 10323.

[0071] The first end of the first source follower 10311 and the first end of the first auxiliary amplifier 10312 are both electrically connected to the first end of the common-mode feedback adjustment network 101, the second end of the second source follower 10321 and the first end of the second auxiliary amplifier 10322 are both electrically connected to the second end of the common-mode feedback adjustment network 101, the second end of the first source follower 10311 and the second end of the second source follower 10321 are both used to electrically connect to the passive mixer 20, and the second end of the first auxiliary amplifier 10312 is electrically connected to the first resistor R in the common-mode voltage control circuit 102. SP and a first end of the first current regulating module 10313, and a second end of the second auxiliary amplifier 10322 is electrically connected to a second resistor R in the common mode voltage control circuit 102. SNThe first end of the first source follower 10311 and the first end of the second current regulating module 10323, the third end of the first source follower 10311, the third end of the second source follower 10321, the second end of the first current regulating module 10313 and the second end of the second current regulating module 10323 are all used to electrically connect to the power supply, and the fourth end of the first source follower 10311, the fourth end of the second source follower 10321, the third end of the first auxiliary amplifier 10312 and the third end of the second auxiliary amplifier 10322 are all used to be grounded;

[0072] A first driving control module 1031, configured to output a first driving control signal for the passive mixer 20 according to a first input signal;

[0073] The second driving control module 1032 is used to output a second driving control signal for the passive mixer 20 according to the second input signal. The driving control signal includes a first driving control signal and a second driving control signal.

[0074] In the embodiment of the present invention, specifically, Figure 3 As shown, the first current regulating module 10313 may include a first current source C2, or may include any other device or module that can play an equivalent control circuit role, the second current regulating module 10323 may include a second current source C5, or may include any other device or module that can play an equivalent control circuit role, the first auxiliary amplifier 10312 may include a first switch device MP1, the second auxiliary amplifier 10322 may include a second switch device MP2, the first source follower 10311 may include a third switch device MP3 and a third current source C1, and the second source follower 10321 may include a fourth switch device MP4 and a fourth current source C6, wherein:

[0075] The first electrode of the third switch device MP3 and the first electrode of the first switch device MP1 are both electrically connected to the first end of the common-mode feedback adjustment network 101, the first electrode of the fourth switch device MP4 and the first electrode of the second switch device MP2 are both electrically connected to the second end of the common-mode feedback adjustment network 101, the second electrode of the third switch device MP3, the second electrode of the fourth switch device MP4, the first end of the third current source C1 and the first end of the fourth current source C6 are all used to electrically connect to the passive mixer 20, and the second electrode of the first switch device MP1 is electrically connected to the first resistor R SP and a first end of the first current source C2, and a second electrode of the second switch device MP2 is electrically connected to a second resistor R SNThe first end of the first current source C2, the second end of the second current source C5, the second end of the third current source C1 and the second end of the fourth current source C6 are all used to electrically connect to the power supply, and the third pole of the first switch device MP1, the third pole of the second switch device MP2, the third pole of the third switch device MP3 and the third pole of the fourth switch device MP4 are all used to ground. Among them, the first switch device MP1 and the second switch device MP2 can be MOS tubes, or any other devices that can be used to play the same auxiliary signal amplification role, and the third switch device MP3 and the fourth switch device MP4 can be MOS tubes, or any other devices that can play the same voltage following role. Optionally, the above-mentioned first switch device MP1, the second switch device MP2, the third switch device MP3 and the fourth switch device MP4 can be NMOS tubes or PMOS tubes, which is not limited in the embodiment of the present invention.

[0076] Exemplarily, when the first switching device MP1, the second switching device MP2, the third switching device MP3 and the fourth switching device MP4 are PMOS tubes, the first source follower 10311 and the second source follower 10321 are both source followers based on PMOS tubes, and the first electrode of the first switching device MP1, the first electrode of the second switching device MP2, the first electrode of the third switching device MP3 and the first electrode of the fourth switching device MP4 are all gates, the second electrode of the first switching device MP1, the second electrode of the second switching device MP2, the second electrode of the third switching device MP3 and the second electrode of the fourth switching device MP4 are all sources, and the third electrode of the first switching device MP1, the third electrode of the second switching device MP2, the third electrode of the third switching device MP3 and the third electrode of the fourth switching device MP4 are all drains.

[0077] It can be seen that this optional embodiment can perform auxiliary amplification on the first input signal through the first auxiliary amplifier 10312 and provide the first input signal after auxiliary amplification to the common-mode voltage detection module 1021, and perform auxiliary amplification on the second input signal through the second auxiliary amplifier 10322 and provide the second input signal after auxiliary amplification to the common-mode voltage detection module 1021, which is beneficial to improving the detection accuracy and reliability of the common-mode voltage by the subsequent common-mode voltage detection module 1021, and amplify the first input signal through the first source follower 10311 to achieve the amplification of the first input signal to the first drive control signal used as the passive mixer 20, which is beneficial to improving the output accuracy of the first drive control signal, and amplify the second input signal through the second source follower 10321 to achieve the amplification of the second input signal to the second drive control signal used as the passive mixer 20, which is beneficial to improving the output accuracy of the second drive control signal, and the current provided by the first current regulation module 10313 and the second current regulation module 10323 is beneficial to realize the control of each component of the common-mode voltage control circuit 102 to operate in the constant current region.

[0078] In yet another optional embodiment, Figure 2 As shown, the common-mode feedback adjustment network 101 includes a voltage feedback module 1011, a third current adjustment module 1012 and a fourth current adjustment module 1013, wherein:

[0079] The first end of the voltage feedback module 1011 is electrically connected to the first end of the first source follower 10311, the first end of the first auxiliary amplifier 10312 and the first end of the third current regulation module 1012, respectively, and is used to access the first input signal. The second end of the voltage feedback module 1011 is electrically connected to the second end of the second source follower 10321, the first end of the second auxiliary amplifier 10322 and the first end of the fourth current regulation module 1013, respectively, and is used to access the second input signal. The third end of the voltage feedback module 1011 is electrically connected to the output end of the voltage operational amplifier module 1022 in the common-mode voltage control circuit 102. The second end of the third current regulation module 1012 and the second end of the fourth current regulation module 1013 are both used to electrically connect to the power supply. The fourth end of the voltage feedback module 1011 is used for grounding.

[0080] The voltage feedback module 1011 is used to control the components of the driving control circuit 103 to operate in a constant current region according to the current provided by the third current regulation module 1012 and the fourth current regulation module 1013 .

[0081] In the embodiment of the present invention, specifically, Figure 3As shown, the third current regulating module 1012 may include a fifth current source C3, or may include any other device or module that can play an equivalent control circuit role, the fourth current regulating module 1013 may include a sixth current source C4, or may include any other device or module that can play an equivalent control circuit role, and the voltage feedback module 1011 may include a fifth switch device MN1, a sixth switch device MN2, a fourth resistor R P , the fifth resistor R N , the sixth resistor R EP And the seventh resistor R EN ,in:

[0082] The first electrode of the fifth switch device MN1 and the first electrode of the sixth switch device MN2 are both electrically connected to the output end of the operational amplifier OP1 in the voltage operational amplifier module 1022, and the second electrode of the fifth switch device MN1 is respectively connected to the first electrode of the third switch device MP3, the first electrode of the first switch device MP1, the first end of the fifth current source C3 and the fourth resistor R P One end of the fourth resistor R P The other end of the sixth switch device MN2 is used to connect the first input signal, and the second electrode of the sixth switch device MN2 is respectively connected to the first electrode of the fourth switch device MP4, the second electrode of the second switch device MP2, the first end of the sixth current source C4 and the fifth resistor R N One end of the fifth resistor R N The other end of the fifth switch device MN1 is used to receive the second input signal, and the third electrode of the fifth switch device MN1 is electrically connected to the sixth resistor R EP The third electrode of the sixth switch device MN2 is electrically connected to the seventh resistor R EN One end of the sixth resistor R EP The other end and the seventh resistor R EN The other end of each is used for grounding. The fifth switch device MN1 and the sixth switch device MN2 may be MOS tubes, or any other device that can be used to play the same voltage feedback role. Specifically, the fifth switch device MN1 and the sixth switch device MN2 may both be NMOS tubes, or both be PMOS tubes, which is not limited in the embodiment of the present invention.

[0083] Exemplarily, when the fifth switch device MN1 and the sixth switch device MN2 are both NMOS tubes, the first electrode of the fifth switch device MN1 and the first electrode of the sixth switch device MN2 are both gates, the second electrode of the fifth switch device MN1 and the second electrode of the sixth switch device MN2 are both drains, and the third electrode of the fifth switch device MN1 and the third electrode of the sixth switch device MN2 are both sources.

[0084] It can be seen that this optional embodiment can control the components of the drive control circuit 103 to operate in the constant current region according to the stable current provided by the third current regulation module 1012 and the fourth current regulation module 1013 through the voltage feedback module 1011, and can improve the control accuracy of the drive circuit 10 operating in the constant current region, which is beneficial to improving the adjustment accuracy of the common-mode voltage by the common-mode feedback adjustment network 101, and further beneficial to achieving the control accuracy and reliability of the common-mode voltage in a stable state through precise adjustment of the common-mode voltage.

[0085] The working principle of the circuit for driving the passive mixer to perform up-conversion in the embodiment of the present invention is as follows:

[0086] In the embodiment of the present invention, after the power supply is powered on, when the first input signal and the second input signal are connected, the first input signal is used to control the first switch device MP1 and the third switch device MP3 to be turned on, and the second input signal is used to control the second switch device MP2 to be turned on. At this time, the first input signal is amplified by the first switch device MP1 under the action of the first current source C2 and by the third switch device MP3 under the action of the third current source C1, the second input signal is amplified by the second switch device MP2 under the action of the second current source C5 and by the fourth switch device MP4 under the action of the fourth current source C6, the first input signal amplified by the third switch device MP3 is used as the first drive control signal and the second input signal amplified by the fourth switch device MP4 is used as the second drive control signal to control the passive mixer 20 to work, which is beneficial to improve the mixing gain of the passive mixer 20 through the drive control of the source follower of the PMOS tube, and is beneficial to reduce the gain loss of the passive mixer 20; then, the first resistor R SP and the first capacitor C SP The first input signal amplified by the first switch device MP1 is filtered and the second resistor R SN and the second capacitor C SNThe first input signal amplified by the second switch device MP2 is filtered, and the common-mode voltage generated by the filtered first input signal and the second input signal is processed by the operational amplifier OP1 according to the connected reference voltage to obtain a voltage control signal, and then the fifth switch device MN1 and the sixth switch device MN2 are controlled to be turned on by the voltage control signal, and the voltage of the first input signal is stabilized by the fifth switch device MN1 and the voltage of the second input signal is stabilized by the sixth switch device MN2, which can ensure that the output voltages of the first input signal and the second input signal follow and remain within a given range, which is beneficial to improving the stability of the common-mode voltage generated by the first input signal and the second input signal, thereby facilitating the improvement of the linearity of the drive signal based on the first input signal and the second input signal, and further facilitating the reduction of the influence on the noise, bandwidth and linearity of the mixing system where the passive mixer 20 is located based on the high-linearity drive signal, for example: Figure 4 As shown, Figure 4 1 is a schematic diagram of the relationship between voltage attenuation and bandwidth characteristics of a passive mixer architecture based on a source follower disclosed in an embodiment of the present invention. By setting a passive mixer architecture based on a source follower, the signal channel bandwidth can be effectively increased to the order of 500 MHz. Figure 5 As shown, Figure 5 Schematic diagram of the relationship between the output linearity of a source follower and the output linearity of a passive mixer disclosed in an embodiment of the present invention, which can control the voltage gain within 5dB, and within the input signal 0dBm, the linearity of the entire mixer architecture can reach below EVM-60dB, that is, by setting a passive mixer architecture based on a source follower, it is beneficial to improve the linearity of the overall architecture; Figure 6 As shown, Figure 6 The present invention discloses a schematic diagram of the relationship between the output impedance characteristics of a passive mixer architecture based on a source follower, which is beneficial for achieving low output impedance of the passive mixer by setting a source follower.

[0087] Embodiment 2

[0088] See also Figure 7 , Figure 7 is a schematic diagram of the structure of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention. Figure 7 The circuit for driving the passive mixer to perform up-conversion can be applied to an electronic product that drives the passive mixer 20 to perform up-conversion, and the embodiment of the present invention does not limit this. Figure 7As shown, the circuit for driving the passive mixer to perform up-conversion includes a driving circuit 10, and also includes a voltage bias circuit 40, and the voltage bias circuit 40 is used to control each component in the driving circuit 10 to be at a desired working potential, wherein the voltage bias circuit 40 includes a filtering attenuation module 401, a fifth current regulating module 402 and a sixth current regulating module 403, wherein:

[0089] The first end of the filter attenuation circuit is electrically connected to the first end of the fifth current regulation module 402 and the first end of the voltage feedback module 1011 in the driving circuit 10, and is used to receive the first input signal. The second end of the filter attenuation circuit is electrically connected to the first end of the sixth current regulation module 403 and the second end of the voltage feedback module 1011 in the driving circuit 10, and is used to receive the second input signal. The second end of the fifth current regulation module 402 and the second end of the sixth current regulation module 403 are both used for grounding.

[0090] In the embodiment of the present invention, specifically, Figure 8 As shown, Figure 8 is a schematic diagram of a voltage bias circuit disclosed in an embodiment of the present invention, such as Figure 8 As shown, the fifth current regulating module 402 includes a seventh current source C_Shift_IP, the sixth current regulating module 403 includes an eighth current source C_Shift_IN, and the filtering attenuation module 401 includes an eighth resistor R S_IP 、The ninth resistor R S_IN , at least two tenth resistors connected in series (such as Figure 8 R P_IN and P R_IP ), at least two fourth capacitors connected in series (such as Figure 8 C_IN and C_IP in the equation, where:

[0091] The eighth resistor R S_IP One end of the first resistor R1 is electrically connected to one end of the tenth resistor, one end of the fourth capacitor, a first end of the seventh current source C_Shift_IP and a first resistor R2 of the voltage feedback module 1011 in the driving circuit 10. SP The other end of the eighth resistor R S_IP The other end is used to connect the first input signal, the ninth resistor R S_IN One end of the first resistor is electrically connected to the other end of the tenth resistor, the other end of the fourth capacitor, the first end of the eighth current source C_Shift_IN and the second resistor R of the voltage feedback module 1011. SN The other end of the ninth resistor R S_INThe other end of is used to connect the second input signal, and the second end of the seventh current source C_Shift_IP and the second end of the eighth current source C_Shift_IN are both grounded. By setting the voltage bias circuit 40, the voltage fluctuation range of each component (such as MOS tube) in the driving circuit 10 can be handled to ensure that each component in the driving circuit 10 can be at the required working potential.

[0092] In an optional embodiment, if Fig. 9 As shown, Fig. 9 is a schematic diagram of the structure of another circuit for driving a passive mixer to perform up-conversion disclosed in an embodiment of the present invention, such as Fig. 9 As shown, the circuit for driving the passive mixer for up-conversion also includes a passive mixer 20, wherein the first end of the passive mixer 20 is electrically connected to the second end of the first source follower 10311, the second end of the passive mixer 20 is electrically connected to the second end of the second source follower 10321, the third end of the passive mixer 20 is used to access the local oscillator signal, and the fourth end of the passive mixer 20 is used to electrically connect to the radio frequency circuit 30. Wherein, the local oscillator signal is a signal output by the local oscillator (LO), and the local oscillator signal can also be a differential signal, that is, the first local oscillator signal and the second local oscillator signal contained in the local oscillator signal also constitute a differential signal. Optionally, the local oscillator signal can be a signal of an in-phase component or a signal of an orthogonal component. Specifically, when the first input signal and the second input signal are signals of the in-phase component, the local oscillator signal is also a signal of the in-phase component; when the first input signal and the second input signal are signals of the orthogonal component, the local oscillator signal is also a signal of the orthogonal component. In this way, the drive control of the passive mixer 20 can be achieved through the first drive control signal output by the third switch device MP3 in the first source follower 10311, the second drive control signal output by the fourth switch device MP4 in the second source follower 10321, and the connected local oscillator signal, so that the passive mixer 20 up-converts the RF circuit 30, which is beneficial to improving the drive control accuracy of the passive mixer 20 based on the first drive control signal, the second drive control signal and the local oscillator signal, and is beneficial to improving the mixing gain of the passive mixer 20, thereby helping to improve the up-conversion accuracy of the passive mixer 20, and further helping to improve the communication accuracy of the RF circuit 30.

[0093] In this optional embodiment, as an optional implementation, the number of the circuits for driving the passive mixer to perform up-conversion is greater than 1, and the circuit for driving the passive mixer to perform up-conversion further includes an adder P, and each circuit is connected in parallel through the adder P, wherein:

[0094] A fourth terminal of the passive mixer 20 is electrically connected to a first terminal of the adder P, and a second terminal of the adder P is electrically connected to the RF circuit 30 .

[0095] For example, Fig.10 As shown, Fig.10 1 is a schematic diagram of the overall structure of a circuit for driving a passive mixer for up-conversion disclosed in an embodiment of the present invention. When the number of circuits for driving a passive mixer for up-conversion is 2 (such as Fig.10 When the I_Path branch and the Q_path branch in the circuit are formed, the number of the passive mixers 20 is also 2, that is, the circuit includes a first passive mixer 20 and a second passive mixer 20. At this time, the first passive mixer 20 can be driven and controlled by the local oscillator signal of the in-phase component and the driving control signal of the in-phase component, wherein the driving control signal of the in-phase component includes a first driving control signal based on the first input signal of the in-phase component and a second driving control signal based on the second input signal of the in-phase component; the second passive mixer 20 can be driven and controlled by the local oscillator signal of the quadrature component and the driving control signal of the quadrature component, wherein the driving control signal of the quadrature component includes a first driving control signal based on the first input signal of the quadrature component and a second driving control signal based on the second input signal of the quadrature component.

[0096] For example, Fig.11 As shown, Fig.11 is a schematic diagram of the overall structure of another circuit for driving a passive mixer for up-conversion disclosed in an embodiment of the present invention. When the number of circuits for driving a passive mixer for up-conversion is 3 (such as Figure 8 When the I_Path branch, the 45°_Path branch and the Q_path branch are connected, the number of the passive mixers 20 is also 3, that is, the circuit further includes a third passive mixer 20 (such as Figure 8 HRM_MIXER in, harmonic suppression mixer), and at this time the third passive mixer 20 can be driven and controlled by a local oscillator signal that is offset 45 degrees relative to the in-phase component and 45 degrees relative to the orthogonal component, and a driving control signal that is offset 45 degrees relative to the in-phase component and 45 degrees relative to the orthogonal component.

[0097] like Fig.12 As shown, Fig.12 is a schematic diagram of the structure of a passive mixer disclosed in an embodiment of the present invention, wherein: Fig.12 The number of circuits used to drive the passive mixer for up-conversion is 2, such as Fig.12 As shown, the first passive mixer 20 includes a seventh switch device, an eighth switch device, a ninth switch device and a tenth switch device, and the second passive mixer 20 includes an eleventh switch device, a twelfth switch device, a thirteenth switch device and a fourteenth switch device, wherein:

[0098] The first electrode of the seventh switch device and the first electrode of the tenth switch device are used to access the first local oscillation signal of the in-phase component (ie Fig.12 LO_IP in the figure), the first pole of the eighth switch device and the first pole of the ninth switch device are used to access the second local oscillator signal of the in-phase component (ie Fig.12 LO_IN in the LO_IN), the second pole of the seventh switch device and the second pole of the eighth switch device are used to access the second input signal of the in-phase component (ie Fig. 9 IF_IN in the IF_IN), the second pole of the ninth switching device and the second pole of the tenth switching device are used to access the first input signal of the in-phase component (ie Fig.12 IF_IP in the 11th switch device, the first electrode of the 11th switch device and the first electrode of the 14th switch device are both used to access the first local oscillator signal of the orthogonal component (ie Fig.12 LO_QP in the figure), the first pole of the twelfth switch device and the first pole of the thirteenth switch device are both used to access the second local oscillator signal of the orthogonal component (i.e. Fig.12 LO_QN in the figure), the second pole of the eleventh switch device and the second pole of the twelfth switch device are both used to access the first input signal of the orthogonal component, the second pole of the thirteenth switch device and the second pole of the fourteenth switch device are both used to access the second input signal of the orthogonal component, the third pole of the seventh switch device, the third pole of the ninth switch device, the third pole of the eleventh switch device and the third pole of the thirteenth switch device are all used to output the first RF signal (i.e. Fig.12 RF_ON in the figure), and the first RF signal can be used to input to the first input terminal of the adder P, and the third pole of the eighth switch device, the third pole of the tenth switch device, the third pole of the twelfth switch device and the third pole of the fourteenth switch device are all used to output the second RF signal (that is, Fig.12 In this way, by providing a plurality of optional passive mixers 20, it is beneficial to improve the gain of the mixing system while improving the driving control accuracy and flexibility of the passive mixer 20, thereby improving the up-conversion accuracy, and further facilitating the accurate communication function of the RF circuit 30.

[0099] It should be noted that for the relevant description of the driving circuit 10, wherein the driving circuit 10 includes a common-mode feedback adjustment network 101, a common-mode voltage control circuit 102 and a driving control circuit 103, please refer to the description of the relevant contents in the above embodiment 1, which will not be repeated here.

[0100] The working principle of the circuit for driving the passive mixer to perform up-conversion in the embodiment of the present invention is as follows:

[0101] In the embodiment of the present invention, after the power supply is powered on, when the input signal and the local oscillator signal of each component are connected, the drive control circuit 103 composed of the source follower in the branch where the component signal is located outputs the drive control signal based on the input signal of the component, and inputs the drive control signal to the passive mixer 20 in the branch where the component signal is located, and the passive mixer 20 performs mixing processing on the drive control signal and the local oscillator signal to obtain the RF signal of the component, and then the RF signals of all components are input into the RF circuit 30 through the adder P, so that The RF circuit 30 realizes the function of wireless communication by processing the RF signals of all components. The driving control signal output by the driving control circuit 103 of the branch where each component signal is located can improve the precise driving of the passive mixer 20 in the branch, which is beneficial to improve the gain of the passive mixer 20 while improving the linearity of the passive mixer 20, so that the driven passive mixer 20 can accurately generate the corresponding RF signal through the driving control signal and the local oscillator signal input into the branch, thereby contributing to the wireless communication function of the RF circuit 30.

[0102] Embodiment 3

[0103] See also Fig.13 , Fig.13 is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. Fig.13 The electronic device described is a device that needs to drive the passive mixer 20 for up-conversion, and the electronic device includes a device body, and the electronic device also includes a circuit for driving the passive mixer for up-conversion as in Embodiment 1 or Embodiment 2. It should be noted that for a detailed description of the circuit for driving the passive mixer for up-conversion, please refer to the specific description of the relevant contents in Embodiment 1 and Embodiment 2, which will not be repeated in this embodiment.

[0104] It can be seen that the implementation Fig.13The electronic device described can, when receiving a first input signal and a second input signal, direct the first input signal and the second input signal to a driving control circuit 103 and a common-mode voltage control circuit 102 through a common-mode feedback adjustment network 101, adjust the common-mode voltage generated by the first input signal and the second input signal to obtain an adjusted common-mode voltage, and direct the adjusted common-mode voltage to the common-mode voltage control circuit 102 through the driving control circuit 103; and output a driving control signal for a passive mixer 20 according to the first input signal and the second input signal through the driving control circuit 103 for the passive mixer 20 to work; output a voltage control signal for the common-mode feedback adjustment network 101 according to the received adjusted common-mode voltage and a reference voltage through the common-mode voltage control circuit 102; and then control the common-mode voltage to be in a stable state according to the received voltage control signal through the common-mode feedback adjustment network 101, so as to achieve the above-described electronic device. The driving circuit 10 includes a common-mode feedback adjustment network 101, a common-mode voltage control circuit 102 and a driving control circuit 103, that is, the passive mixer 20 is accurately driven by the driving control signal output by the driving control circuit 103, which is beneficial to improving the mixing gain of the passive mixer 20 based on the driving control of the driving control circuit 103, and is beneficial to reducing the gain loss of the passive mixer 20; and the voltage limitation of the differential signal input to the driving control circuit 103 by the common-mode voltage control circuit 102 and the common-mode feedback adjustment network 101 is beneficial to improving the stability of the common-mode voltage of the differential signal, thereby facilitating improving the linearity of the output driving control signal, and further facilitating reducing the influence of the noise, bandwidth and linearity of the mixing system where the passive mixer 20 is located based on the high-linearity driving control signal, that is, reducing the noise brought by the output end of the passive mixer 20, expanding the bandwidth of the passive mixer 20 and improving the linearity of the passive mixer 20 through hardware.

[0105] Finally, it should be noted that the circuit and electronic device for driving a passive mixer for up-conversion disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, and are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit for driving a passive mixer for up-conversion, characterized in that: The circuit comprises a driving circuit (10), and the driving circuit (10) comprises a common-mode feedback adjustment network (101), a common-mode voltage control circuit (102) and a driving control circuit (103), wherein: A first end of the common-mode feedback adjustment network (101) is electrically connected to a first end of the drive control circuit (103) and is used to receive a first input signal; a second end of the common-mode feedback adjustment network (101) is electrically connected to a second end of the drive control circuit (103) and is used to receive a second input signal; a third end of the common-mode feedback adjustment network (101) is electrically connected to a first end of the common-mode voltage control circuit (102); a third end of the drive control circuit (103) is electrically connected to a second end of the common-mode voltage control circuit (102); and a fourth end of the drive control circuit (103) is electrically connected to a The first end of the common-mode voltage control circuit (101) is electrically connected to the third end of the common-mode voltage control circuit (102), and the fifth end of the drive control circuit (103) is used to electrically connect to the passive mixer (20), and the passive mixer (20) is used to electrically connect to the radio frequency circuit (30), the fourth end of the common-mode voltage control circuit (102) is used to access the reference voltage, the fourth end of the common-mode feedback adjustment network (101), the fifth end of the common-mode voltage control circuit (102) and the sixth end of the drive control circuit (103) are used to electrically connect to a power supply, and the first input signal and the second input signal constitute a differential signal; The common-mode feedback adjustment network (101) is used for, when the first input signal and the second input signal are connected, causing the first input signal and the second input signal to flow to the drive control circuit (103) and the common-mode voltage control circuit (102), adjusting the common-mode voltage generated by the first input signal and the second input signal to obtain an adjusted common-mode voltage, and causing the adjusted common-mode voltage to flow to the common-mode voltage control circuit (102) through the drive control circuit (103); The driving control circuit (103) is used to output a driving control signal for the passive mixer (20) according to the first input signal and the second input signal, so as to enable the passive mixer (20) to operate; The common mode voltage control circuit (102) is used to output a voltage control signal for the common mode feedback adjustment network (101) according to the received adjusted common mode voltage and the reference voltage; The common-mode feedback adjustment network (101) is also used to control the common-mode voltage to be in a stable state according to the received voltage control signal.

2. The circuit for driving a passive mixer for up-conversion according to claim 1, characterized in that: The common mode voltage control circuit (102) comprises a common mode voltage detection module (1021) and a voltage operational amplifier module (1022), wherein: The first end of the common-mode voltage detection module (1021) is electrically connected to the third end of the drive control circuit (103); the second end of the common-mode voltage detection module (1021) is electrically connected to the fourth end of the drive control circuit (103); the third end of the common-mode voltage detection module (1021) is electrically connected to the first input end of the voltage operational amplifier module (1022) and is used to electrically connect to the power supply; the second input end of the voltage operational amplifier module (1022) is used to electrically connect to the reference voltage; and the output end of the voltage operational amplifier module (1022) is electrically connected to the third end of the common-mode feedback adjustment network (101); The common-mode voltage detection module (1021) is used to detect the adjusted common-mode voltage, and to pass the adjusted common-mode voltage to the voltage operational amplifier module (1022), and to trigger the voltage operational amplifier module (1022) to perform operational amplifier processing on the adjusted common-mode voltage according to the connected reference voltage to obtain a voltage control signal for the common-mode feedback adjustment network (101).

3. The circuit for driving a passive mixer for up-conversion according to claim 2, characterized in that: The common mode voltage detection module (1021) comprises a first resistor (R SP )、Second resistor (R SN ), the first capacitor (C SP ) and the second capacitor (C SN ),in: The first resistor (R SP ) and the first capacitor (C SP ) is electrically connected to a third end of the drive control circuit (103), and the second resistor (R SN ) and the second capacitor (C SN ) is electrically connected to a fourth end of the drive control circuit (103), and the first resistor (R SP ) and the other end of the first capacitor (C SP ) and the other end of the second resistor (R SN ) and the other end of the second capacitor (C SN ) are electrically connected to the first input terminal of the voltage amplifier module (1022) and are used to electrically connect to the power supply.

4. The circuit for driving a passive mixer for up-conversion according to claim 3, characterized in that: The common-mode voltage control circuit (102) further comprises a common-mode voltage compensation module (1023), wherein the common-mode voltage compensation module (1023) comprises a third resistor (R EPN ) and the third capacitor (C EPN ),in: The third resistor (R EPN ) are connected to the first resistor (R SP ) and the other end of the first capacitor (C SP ) and the other end of the second resistor (R SN ) and the other end of the second capacitor (C SN ) is electrically connected to the other end of the third resistor (R EPN ) is electrically connected to the third capacitor (C EPN ) one end, the third capacitor (C EPN ) is used to electrically connect the power supply; The common-mode voltage compensation module (1023) is used to perform voltage compensation on the adjusted common-mode voltage so as to make the voltage of each component flowing through the common-mode voltage control circuit (102) constant.

5. The circuit for driving a passive mixer for up-conversion according to any one of claims 1 to 4, characterized in that: The drive control circuit (103) comprises a first drive control module (1031) and a second drive control module (1032), wherein the first drive control module (1031) comprises a first source follower (10311), a first auxiliary amplifier (10312) and a first current regulation module (10313), and the second drive control module (1032) comprises a second source follower (10321), a second auxiliary amplifier (10322) and a second current regulation module (10323), wherein: The first end of the first source follower (10311) and the first end of the first auxiliary amplifier (10312) are both electrically connected to the first end of the common-mode feedback adjustment network (101); the second end of the second source follower (10321) and the first end of the second auxiliary amplifier (10322) are both electrically connected to the second end of the common-mode feedback adjustment network (101); the second end of the first source follower (10311) and the second end of the second source follower (10321) are both used to electrically connect to the passive mixer (20); the second end of the first auxiliary amplifier (10312) is electrically connected to one end of a first resistor (RSP) in the common-mode voltage control circuit (102) and a first end of the first current regulation module (10313). end, the second end of the second auxiliary amplifier (10322) is electrically connected to one end of the second resistor (RSN) in the common-mode voltage control circuit (102) and the first end of the second current regulating module (10323), the third end of the first source follower (10311), the third end of the second source follower (10321), the second end of the first current regulating module (10313) and the second end of the second current regulating module (10323) are all used to electrically connect to the power supply, and the fourth end of the first source follower (10311), the fourth end of the second source follower (10321), the third end of the first auxiliary amplifier (10312) and the third end of the second auxiliary amplifier (10322) are all used to be grounded; The first driving control module (1031) is used to output a first driving control signal for the passive mixer (20) according to the first input signal; The second drive control module (1032) is used to output a second drive control signal for the passive mixer (20) according to the second input signal, wherein the drive control signal includes the first drive control signal and the second drive control signal.

6. The circuit for driving a passive mixer for up-conversion according to claim 5, characterized in that: The common-mode feedback adjustment network (101) comprises a voltage feedback module (1011), a third current adjustment module (1012) and a fourth current adjustment module (1013), wherein: The first end of the voltage feedback module (1011) is electrically connected to the first end of the first source follower (10311), the first end of the first auxiliary amplifier (10312) and the first end of the third current regulation module (1012) respectively, and is used to receive a first input signal; the second end of the voltage feedback module (1011) is electrically connected to the second end of the second source follower (10321), the first end of the second auxiliary amplifier (10322) and the first end of the fourth current regulation module (1013) respectively, and is used to receive a second input signal; the third end of the voltage feedback module (1011) is electrically connected to the output end of the voltage operational amplifier module (1022) in the common-mode voltage control circuit (102); the second end of the third current regulation module (1012) and the second end of the fourth current regulation module (1013) are both used to electrically connect to the power supply; and the fourth end of the voltage feedback module (1011) is used to be grounded; The voltage feedback module (1011) is used to control each component of the drive control circuit (103) to operate in a constant current region according to the current provided by the third current regulation module (1012) and the fourth current regulation module (1013).

7. The circuit for driving a passive mixer for up-conversion according to claim 6, characterized in that: The circuit further comprises a voltage bias circuit (40), and the voltage bias circuit (40) is used to control each component in the driving circuit (10) to be at a required working potential, wherein the voltage bias circuit (40) comprises a filtering attenuation module (401), a fifth current regulating module (402) and a sixth current regulating module (403), wherein: The first end of the filtering and attenuating circuit is electrically connected to the first end of the fifth current regulating module (402) and the first end of the voltage feedback module (1011) in the driving circuit (10), and is used to receive the first input signal. The second end of the filtering and attenuating circuit is electrically connected to the first end of the sixth current regulating module (403) and the second end of the voltage feedback module (1011) in the driving circuit (10), and is used to receive the second input signal. The second end of the fifth current regulating module (402) and the second end of the sixth current regulating module (403) are both used for grounding.

8. The circuit for driving a passive mixer for up-conversion according to claim 7, characterized in that: The circuit also includes the passive mixer (20), wherein a first end of the passive mixer (20) is electrically connected to a second end of the first source follower (10311), a second end of the passive mixer (20) is electrically connected to a second end of the second source follower (10321), a third end of the passive mixer (20) is used to access a local oscillator signal, and a fourth end of the passive mixer (20) is used to electrically connect to the radio frequency circuit (30).

9. The circuit for driving a passive mixer for up-conversion according to claim 8, characterized in that: The number of the circuits is greater than 1, the circuits further include an adder (P), and each of the circuits is connected in parallel via the adder (P), wherein: The fourth end of the passive mixer (20) is electrically connected to the first end of the adder (P), and the second end of the adder (P) is used to electrically connect to the radio frequency circuit (30).

10. An electronic device, comprising a device body, characterized in that: The electronic device further comprises a circuit for driving a passive mixer to perform up-conversion as described in any one of claims 1 to 9.

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