Circuits and electronic devices used to drive passive mixers for upconversion.

Abstract

This invention relates to the field of communication technology and discloses a circuit and electronic device for driving a passive mixer for up-conversion. The common-mode voltage of the differential signal is adjusted through a common-mode feedback adjustment network, and the adjusted voltage flows to a common-mode voltage control circuit. A drive control circuit outputs a drive control signal based on the differential signal to power the passive mixer. The common-mode voltage control circuit outputs a voltage control signal based on the adjusted voltage and a reference voltage, ensuring the common-mode voltage is regulated by the common-mode feedback adjustment network. Therefore, implementing this invention enables precise driving of the passive mixer through the processing of the differential signal by the drive control circuit. This is beneficial for improving the mixing gain of the passive mixer through drive control based on the drive control circuit, and it can improve the stability of the differential signal by setting up the common-mode feedback adjustment network and the common-mode voltage control circuit, thereby reducing the impact on the noise, bandwidth, and linearity of the mixing system.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a circuit and electronic device for driving a passive mixer to perform upconversion. Background Technology

[0002] As wireless network speeds increase, the performance requirements for analog and RF systems also grow. These requirements include higher linearity and wider bandwidth—for example, Wi-Fi 6 / Wi-Fi 7 requires a bandwidth of 320MHz, and EVM needs to reach -38dB or higher. Currently, passive mixers are commonly used in the transmit channels of integrated circuits. However, passive mixers have low gain. Existing solutions mainly rely on an architecture that combines an Active-LPF (Active Low-Pass Filter) with a passive mixer. Specifically, the Active-LPF filters the input signal so that the filtered signal can drive the passive mixer (such as upconversion).

[0003] However, practical experience has shown that in the Active-LPF plus passive mixer architecture, the Active-LPF can negatively impact the noise, bandwidth, and linearity of the mixing system (e.g., it may introduce additional noise when filtering unwanted frequency components, limit the mixer's bandwidth when reducing interference by restricting the signal's frequency range, and cause signal distortion during filtering, thus affecting the mixer's linearity). This can lead to unsatisfactory channel performance. Furthermore, this architecture requires a large current to improve the passive mixer's gain, which is detrimental to efficiency. Therefore, proposing a technical solution to improve the passive mixer's gain while reducing its impact on the mixing system's noise, bandwidth, and linearity is particularly important. Summary of the Invention

[0004] This invention provides a circuit and electronic device for driving a passive mixer for upconversion, which can improve the driving accuracy of the passive mixer and help increase the gain of the passive mixer while reducing the impact on the noise, bandwidth and linearity of the mixing system.

[0005] To address the aforementioned technical problems, the first aspect of this invention discloses a circuit for driving a passive mixer to perform up-conversion. The circuit includes a driving circuit, which further includes a common-mode feedback adjustment network, a common-mode voltage control circuit, and a drive control circuit, wherein:

[0006] The first terminal of the common-mode feedback adjustment network is electrically connected to the first terminal of the drive control circuit and is used to receive the first input signal. The second terminal of the common-mode feedback adjustment network is electrically connected to the second terminal of the drive control circuit and is used to receive the second input signal. The third terminal of the common-mode feedback adjustment network is electrically connected to the first terminal of the common-mode voltage control circuit. The third terminal of the drive control circuit is electrically connected to the second terminal of the common-mode voltage control circuit. The fourth terminal of the drive control circuit is electrically connected to the third terminal of the common-mode voltage control circuit. The fifth terminal of the drive control circuit is used to electrically connect to a passive mixer. The passive mixer is used to electrically connect to an RF circuit. The fourth terminal of the common-mode voltage control circuit is used to receive a reference voltage. The fourth terminal of the common-mode feedback adjustment network, the fifth terminal of the common-mode voltage control circuit, and the sixth terminal 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 to, when the first input signal and the second input signal are received, direct the first input signal and the second input signal to the drive control circuit and the common-mode voltage control circuit, 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.

[0008] 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.

[0009] The common-mode voltage control circuit is used to output a voltage control signal for the common-mode feedback adjustment network based on 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 regulated 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 terminal of the common-mode voltage detection module is electrically connected to the third terminal of the drive control circuit, the second terminal of the common-mode voltage detection module is electrically connected to the fourth terminal of the drive control circuit, the third terminal of the common-mode voltage detection module is electrically connected to the first input terminal of the voltage amplification module and is used to electrically connect to the power supply, the second input terminal of the voltage amplification module is used to electrically connect to the reference voltage, and the output terminal of the voltage amplification module is electrically connected to the third terminal of the common-mode feedback adjustment network.

[0013] The common-mode voltage detection module is used to detect the adjusted common-mode voltage, and to send 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 input 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 terminal of the drive control circuit. One end of the second resistor and one end of the second capacitor are electrically connected to the fourth terminal of the drive control circuit. The other ends of the first resistor, the first capacitor, the second resistor, and the second capacitor are all electrically connected to the first input terminal 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, the common-mode voltage compensation module including 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 electrically connect to the power supply.

[0018] The common-mode voltage compensation module is used to compensate the adjusted common-mode voltage so that the voltage flowing through each component of the common-mode voltage control circuit remains constant.

[0019] As an optional implementation, in a 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. The second drive control module includes a second source follower, a second auxiliary amplifier, and a second current regulation module, wherein:

[0020] The first terminal of the first source follower and the first terminal of the first auxiliary amplifier are both electrically connected to the first terminal of the common-mode feedback adjustment network. The second terminal of the second source follower and the first terminal of the second auxiliary amplifier are both electrically connected to the second terminal of the common-mode feedback adjustment network. The second terminals of the first and second source followers are both used to electrically connect to the passive mixer. The second terminal 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 terminal of the first current adjustment module. The second terminal 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 terminal of the second current adjustment module. The third terminals of the first and second source followers, the first and second current adjustment modules are all used to electrically connect to the power supply. The fourth terminals of the first and second source followers, the first and second auxiliary amplifiers are all used to ground.

[0021] The first drive control module is configured to output a first drive control signal for the passive mixer based on the first input signal;

[0022] The second drive control module is configured to output a second drive control signal for the passive mixer based on the second input signal, the drive control signal including the first drive control signal and the second drive 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 terminal of the voltage feedback module is electrically connected to the first terminal of the first source follower, the first terminal of the first auxiliary amplifier, and the first terminal of the third current adjustment module, and is used to receive a first input signal. The second terminal of the voltage feedback module is electrically connected to the second terminal of the second source follower, the first terminal of the second auxiliary amplifier, and the first terminal of the fourth current adjustment module, and is used to receive a second input signal. The third terminal of the voltage feedback module is electrically connected to the output terminal of the voltage amplification module in the common-mode voltage control circuit. The second terminals of the third current adjustment module and the second terminals of the fourth current adjustment module are both used to be electrically connected to the power supply. The fourth terminal of the voltage feedback module is used to ground.

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

[0026] As an optional implementation, in the first aspect of the present invention, the circuit further includes a voltage biasing circuit, which is used to control each component in the driving circuit to be at a required operating potential. The voltage biasing circuit includes a filtering and attenuation module, a fifth current adjustment module, and a sixth current adjustment module.

[0027] The first terminal of the filter attenuation circuit is electrically connected to the first terminal of the fifth current adjustment module and the first terminal of the voltage feedback module in the drive circuit, and is used to receive the first input signal. The second terminal of the filter attenuation circuit is electrically connected to the first terminal of the sixth current adjustment module and the second terminal of the voltage feedback module in the drive circuit, and is used to receive the second input signal. The second terminals of the fifth current adjustment module and the second terminals of the sixth current adjustment module are both grounded.

[0028] As an optional implementation, in a first aspect of the present invention, the circuit further includes the passive mixer, wherein a first terminal of the passive mixer is electrically connected to a second terminal of the first source follower, a second terminal of the passive mixer is electrically connected to a second terminal of the second source follower, a third terminal of the passive mixer is used to receive a local oscillator signal, and a fourth terminal of the passive mixer is used to be electrically connected to the radio frequency circuit.

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

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

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

[0032] Implementing this invention has the following beneficial effects:

[0033] This invention provides a circuit for driving a passive mixer to perform upconversion. The circuit includes a drive circuit comprising a common-mode feedback adjustment network, a common-mode voltage control circuit, and a drive control circuit. A first terminal of the common-mode feedback adjustment network is electrically connected to a first terminal of the drive control circuit and is used to receive a first input signal. A second terminal of the common-mode feedback adjustment network is electrically connected to a second terminal of the drive control circuit and is used to receive a second input signal. A third terminal of the common-mode feedback adjustment network is electrically connected to a first terminal of the common-mode voltage control circuit. A third terminal of the drive control circuit is electrically connected to a second terminal of the common-mode voltage control circuit. A fourth terminal of the drive control circuit is electrically connected to a third terminal of the common-mode voltage control circuit. A fifth terminal of the drive control circuit is used to electrically connect to the passive mixer, which is then electrically connected to an RF circuit. A fourth terminal of the common-mode voltage control circuit is used to receive a reference voltage. The fourth terminal of the common-mode feedback adjustment network and the common-mode... The fifth terminal of the voltage control circuit and the sixth terminal of the drive control circuit are used to electrically connect to the power supply. The first input signal and the second input signal constitute a differential signal. The common-mode feedback adjustment network is used to direct the first input signal and the second input signal to the drive control circuit and the common-mode voltage control circuit when the first input signal and the second input signal are connected, 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. The adjusted common-mode voltage is also directed 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 to enable the passive mixer to operate. 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 reference voltage. The common-mode feedback adjustment network is also used to control the common-mode voltage to be in a regulated state according to the received voltage control signal. As can be seen, this invention, by setting a drive circuit (including a common-mode feedback adjustment network, a common-mode voltage control circuit, and a drive control circuit) before the passive mixer, specifically achieves precise driving of the passive mixer through the drive control signal output by the drive control circuit. This is beneficial for improving the mixing gain of the passive mixer based on the drive control circuit, and for reducing the gain loss of the passive mixer. Furthermore, by limiting the voltage of the differential signal input to the drive control circuit through the common-mode voltage control circuit and the common-mode feedback adjustment network, the stability of the differential signal is improved, thereby improving the linearity of the output drive control signal. This, in turn, helps to reduce the impact of the high-linearity drive control signal on the noise, bandwidth, and linearity of the mixing system where the passive mixer is located. In other words, it reduces the noise at the output of the passive mixer, expands the bandwidth of the passive mixer, and improves the linearity of the passive mixer through hardware. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

[0037] Figure 3 This is a schematic diagram of another circuit structure for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

[0038] Figure 4 This is a schematic diagram illustrating 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.

[0039] Figure 5 This is a schematic diagram illustrating the relationship between the output linearity of a source follower and the output linearity of a passive mixer, as disclosed in an embodiment of the present invention.

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

[0041] Figure 7 This is a schematic diagram of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

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

[0043] Figure 9 This is a schematic diagram of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

[0044] Figure 10 This is a schematic diagram of the overall structure of a circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

[0045] Figure 11 This is a schematic diagram of the overall structure of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention.

[0046] Figure 12This is a schematic diagram of the structure of a passive mixer disclosed in an embodiment of the present invention;

[0047] Figure 13 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. Detailed Implementation

[0048] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] It should be noted that, unless otherwise explicitly specified and limited, the term "electrical connection" in the specification, claims, and accompanying drawings of this invention should be interpreted broadly. For example, it can refer to 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 a connection capable of communication; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two elements or the interaction between two elements. Furthermore, the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Example 1

[0051] Please see Figure 1 , Figure 1 This is a schematic diagram of a circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention. Figure 1 The described circuit for driving a passive mixer for upconversion can be applied to electronic products (such as analog and RF systems) that drive a passive mixer 20 for upconversion, and this embodiment of the invention is not limited thereto. Figure 1 As shown, the circuit for driving the passive mixer to perform upconversion may include a drive circuit 10, and the drive circuit 10 includes a common-mode feedback adjustment network 101, a common-mode voltage control circuit 102, and a drive control circuit 103, wherein:

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

[0053] The common-mode feedback adjustment network 101 is used to direct the first input signal and the second input signal to the drive control circuit 103 and the common-mode voltage control circuit 102 when the first input signal and the second input signal are connected, 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 direct the adjusted common-mode voltage to the common-mode voltage control circuit 102 through the drive control circuit 103.

[0054] The drive control circuit 103 is used to output a drive 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 based on 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 regulated state according to the received voltage control signal.

[0057] In this embodiment of the invention, the drive control circuit 103 can be a circuit composed of multiple source followers. Specifically, the source followers can be PMOS-based or NMOS-based. The first input signal and the second input signal constitute a differential signal. Specifically, when the first input signal is a positive input signal, the second input signal is an inverting input signal; when the first input signal is an inverting input signal, the second input signal is a positive input signal. Optionally, the differential signal composed of the first input signal and the second input signal can be a signal with in-phase components, i.e., a signal in phase with the reference signal, or a signal with quadrature components, i.e., a signal with a 90-degree phase difference from the reference signal. This embodiment of the invention does not impose any limitations.

[0058] It is evident that implementation Figure 1 The described circuit for driving a passive mixer for upconversion can, when a first input signal and a second input signal are input, direct the first and second input signals to the drive control circuit 103 and the common-mode voltage control circuit 102 via the common-mode feedback adjustment network 101, adjust the common-mode voltage generated by the first and second input signals to obtain an adjusted common-mode voltage, and direct the adjusted common-mode voltage to the common-mode voltage control circuit 102 via the drive control circuit 103; the drive control circuit 103 outputs a drive control signal for the passive mixer 20 based on the first and second input signals to enable the passive mixer 20 to operate; the common-mode voltage control circuit 102 outputs a voltage control signal for the common-mode feedback adjustment network 101 based on the received adjusted common-mode voltage and reference voltage; and the common-mode feedback adjustment network 101 controls the common-mode voltage to be in a regulated state based on the received voltage control signal, enabling the setting of a drive before the passive mixer 20. Circuit 10 (the drive circuit 10 includes a common-mode feedback adjustment network 101, a common-mode voltage control circuit 102, and a drive control circuit 103) achieves precise driving of the passive mixer 20 through the drive control signal output by the drive control circuit 103. This is beneficial for improving the mixing gain of the passive mixer 20 based on the drive control of the drive control circuit 103, and for reducing the gain loss of the passive mixer 20. Furthermore, the voltage limitation of the differential signal input to the drive control circuit 103 by the common-mode voltage control circuit 102 and the common-mode feedback adjustment network 101 is beneficial for improving the stability of the common-mode voltage of the differential signal, thereby improving the linearity of the output drive control signal. This, in turn, helps to reduce the impact of the high-linearity drive control signal on the noise, bandwidth, and linearity of the mixing system in which the passive mixer 20 is located. In other words, it reduces the noise at the output of the passive mixer 20, expands the bandwidth of the passive mixer 20, and improves the linearity of the passive mixer 20 through hardware.

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

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

[0061] The common-mode voltage detection module 1021 detects the adjusted common-mode voltage and sends it to the voltage operational amplifier module 1022. The voltage operational amplifier module 1022 then processes the adjusted common-mode voltage according to the input reference voltage to obtain a voltage control signal for the common-mode feedback adjustment network 101. The common-mode voltage detected by the common-mode voltage detection module 1021 is the voltage between the third and fourth terminals of the drive control circuit 103. It should be noted that when the common-mode voltage detection module 1021 provides the aforementioned common-mode voltage to the voltage operational amplifier module 1022, this common-mode voltage can be used only for comparison with the reference voltage in the voltage operational amplifier module 1022. That is, the common-mode voltage does not need to be used as the power supply voltage for the voltage operational amplifier module 1022; instead, it can be powered by the voltage provided by the power supply.

[0062] As can be seen, this optional embodiment can detect the adjusted common-mode voltage through the common-mode voltage detection module 1021, and send the adjusted common-mode voltage to the voltage operational amplifier module 1022. The voltage operational amplifier module 1022 compares the adjusted common-mode voltage with the reference voltage to obtain a voltage control signal for the common-mode feedback adjustment network 101. The common-mode voltage detection module 1021 can improve the detection accuracy of the adjusted common-mode voltage, and the voltage operational amplifier module 1022 can accurately compare the accurately detected common-mode voltage with the reference voltage to obtain a voltage control signal for the common-mode feedback adjustment network 101. This is beneficial to improving the accuracy and reliability of the voltage control signal obtained by comparison, and thus beneficial to feeding the generated accurate voltage control signal back to the common-mode feedback adjustment network 101 to achieve voltage regulation control of the common-mode voltage, thereby improving the stability of the common-mode voltage.

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

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

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

[0066] It should be noted that when the first input signal and the second input signal input to the drive 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 blocked 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. Moreover, 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, such as Figure 2 As shown, the common-mode voltage control circuit 102 also includes a common-mode voltage compensation module 1023, and as shown in the figure. Figure 3 As shown, the common-mode voltage compensation module 1023 includes a third resistor R.EPN and the third capacitor C EPN ,in:

[0068] Third resistor R EPN One end is connected to the first resistor R SP The other end, the first capacitor C SP The other end, 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 the third capacitor C. EPN One end, the third capacitor C EPN The other end is used for electrical connection to the power supply;

[0069] The common-mode voltage compensation module 1023 is used to compensate the adjusted common-mode voltage to keep the voltage flowing through the components of the common-mode voltage control circuit 102 constant. This allows for current limiting of the drive circuit 10 through the series connection of resistors and capacitors in the common-mode voltage compensation module 1023, thereby limiting the voltage of the drive circuit 10 within a constant voltage range. This facilitates precise control of the common-mode voltage by controlling the current, thus preventing damage to the drive circuit 10 from excessively high or low voltages.

[0070] In another alternative embodiment, such as Figure 2 As shown, the drive control circuit 103 includes a first drive control module 1031 and a second drive control module 1032. The first drive control module 1031 includes a first source follower 10311, a first auxiliary amplifier 10312, and a first current regulation module 10313. The second drive control module 1032 includes a second source follower 10321, a second auxiliary amplifier 10322, and a second current regulation module 10323, wherein:

[0071] The first terminal of the first source follower 10311 and the first terminal of the first auxiliary amplifier 10312 are both electrically connected to the first terminal of the common-mode feedback adjustment network 101. The second terminal of the second source follower 10321 and the first terminal of the second auxiliary amplifier 10322 are both electrically connected to the second terminal of the common-mode feedback adjustment network 101. The second terminals of the first source follower 10311 and the second terminal of the second source follower 10321 are both used to electrically connect to the passive mixer 20. The second terminal of the first auxiliary amplifier 10312 is electrically connected to the first resistor R in the common-mode voltage control circuit 102. SP One end of the first current regulation module 10313 and the second end of the second auxiliary amplifier 10322 are electrically connected to the second resistor R in the common-mode voltage control circuit 102. SNOne end of the first current regulating module 10323 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 ground;

[0072] The first drive control module 1031 is used to output a first drive control signal for the passive mixer 20 according to the first input signal;

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

[0074] In specific embodiments of the present invention, such as... Figure 3 As shown, the first current regulation module 10313 may include a first current source C2, or any other device or module that can perform the same control circuit function. The second current regulation module 10323 may include a second current source C5, or any other device or module that can perform the same control circuit function. The first auxiliary amplifier 10312 may include a first switching device MP1, the second auxiliary amplifier 10322 may include a second switching device MP2, the first source follower 10311 may include a third switching device MP3 and a third current source C1, and the second source follower 10321 may include a fourth switching device MP4 and a fourth current source C6, wherein:

[0075] The first terminals of the third switching device MP3 and the first switching device MP1 are both electrically connected to the first terminal of the common-mode feedback adjustment network 101. The first terminals of the fourth switching device MP4 and the second switching device MP2 are both electrically connected to the second terminal of the common-mode feedback adjustment network 101. The second terminals of the third switching device MP3, the fourth switching device MP4, the first terminal of the third current source C1, and the first terminal of the fourth current source C6 are all used to electrically connect to the passive mixer 20. The second terminal of the first switching device MP1 is electrically connected to the first resistor R. SP One end of the second switch device MP2 is electrically connected to the first terminal of the first current source C2, and the second terminal of the second switch device MP2 is electrically connected to the second resistor R. SNOne end of the first current source C5 and the first end of the second current source C5, the second ends of the first current source C2, the second ends of the second current source C5, the second ends of the third current source C1 and the second ends of the fourth current source C6 are all used to electrically connect to the power supply. The third terminals of the first switching device MP1, the second switching device MP2, the third switching device MP3 and the fourth switching device MP4 are all used to ground. The first switching device MP1 and the second switching device MP2 can be MOSFETs or any other device capable of providing equivalent auxiliary signal amplification. The third switching device MP3 and the fourth switching device MP4 can be MOSFETs or any other device capable of providing equivalent voltage following. Optionally, the first switching device MP1, the second switching device MP2, the third switching device MP3 and the fourth switching device MP4 can be NMOS transistors or PMOS transistors; this embodiment of the invention is not limited to any particular type.

[0076] For example, when the first switching device MP1, the second switching device MP2, the third switching device MP3, and the fourth switching device MP4 are PMOS transistors, the first source follower 10311 and the second source follower 10321 are both PMOS transistor-based source followers. The first terminal of the first switching device MP1, the first terminal of the second switching device MP2, the first terminal of the third switching device MP3, and the first terminal of the fourth switching device MP4 are all gates. The second terminals of the first switching device MP1, the second terminal of the second switching device MP2, the second terminal of the third switching device MP3, and the second terminal of the fourth switching device MP4 are all sources. The third terminals of the first switching device MP1, the third terminal of the second switching device MP2, the third terminal of the third switching device MP3, and the third terminal of the fourth switching device MP4 are all drains.

[0077] As can be seen, this optional embodiment can amplify the first input signal through the first auxiliary amplifier 10312 and provide the amplified first input signal to the common-mode voltage detection module 1021, and amplify the second input signal through the second auxiliary amplifier 10322 and provide the amplified second input signal to the common-mode voltage detection module 1021. This is beneficial to improving the accuracy and reliability of the common-mode voltage detection module 1021 in detecting the common-mode voltage. Furthermore, the amplification of the first input signal by the first source follower 10311 is used to amplify the first input signal to serve as the first drive control signal of the passive mixer 20, which is beneficial to improving the output accuracy of the first drive control signal. Similarly, the amplification of the second input signal by the second source follower 10321 is used to amplify the second input signal to serve as the second drive control signal of the passive mixer 20, which is beneficial to improving the output accuracy of the second drive control signal. Moreover, the current provided by the first current adjustment module 10313 and the second current adjustment module 10323 is beneficial to controlling the components of the common-mode voltage control circuit 102 to operate in the constant current region.

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

[0079] The first terminal of the voltage feedback module 1011 is electrically connected to the first terminal of the first source follower 10311, the first terminal of the first auxiliary amplifier 10312, and the first terminal of the third current adjustment module 1012, and is used to receive the first input signal. The second terminal of the voltage feedback module 1011 is electrically connected to the second terminal of the second source follower 10321, the first terminal of the second auxiliary amplifier 10322, and the first terminal of the fourth current adjustment module 1013, and is used to receive the second input signal. The third terminal of the voltage feedback module 1011 is electrically connected to the output terminal of the voltage operational amplifier module 1022 in the common-mode voltage control circuit 102. The second terminals of the third current adjustment module 1012 and the fourth current adjustment module 1013 are both used to be electrically connected to the power supply. The fourth terminal of the voltage feedback module 1011 is used to ground.

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

[0081] In specific embodiments of the present invention, such as... Figure 3As shown, the third current regulation module 1012 may include a fifth current source C3, or any other device or module that can perform the same control circuit function. The fourth current regulation module 1013 may include a sixth current source C4, or any other device or module that can perform the same control circuit function. The voltage feedback module 1011 may include a fifth switching device MN1, a sixth switching device MN2, and a fourth resistor R. P Fifth resistor R N The sixth resistor R EP and the seventh resistor R EN ,in:

[0082] The first terminals of the fifth switching device MN1 and the sixth switching device MN2 are both electrically connected to the output terminal of the operational amplifier OP1 in the voltage operational amplifier module 1022. The second terminal of the fifth switching device MN1 is connected to the first terminal of the third switching device MP3, the first terminal of the first switching device MP1, the first terminal of the fifth current source C3, and the fourth resistor R. P One end is electrically connected to the fourth resistor R. P The other end is used to connect to the first input signal. The second terminal of the sixth switching device MN2 is connected to the first terminal of the fourth switching device MP4, the second terminal of the second switching device MP2, the first terminal of the sixth current source C4, and the fifth resistor R. N One end is electrically connected to the fifth resistor R. N The other end is used to connect to the second input signal, and the third pole of the fifth switching device MN1 is electrically connected to the sixth resistor R. EP One end of the sixth switching device MN2 is electrically connected to the third electrode of the seventh resistor R. EN One end, and the sixth resistor R EP The other end and the seventh resistor R EN The other end is used for grounding. Among them, the fifth switching device MN1 and the sixth switching device MN2 can be MOS transistors or any other device that can be used to play the same voltage feedback role. Specifically, the fifth switching device MN1 and the sixth switching device MN2 can both be NMOS transistors or both be PMOS transistors. This embodiment of the invention does not limit the specific devices.

[0083] For example, when both the fifth switching device MN1 and the sixth switching device MN2 are NMOS transistors, the first terminal of the fifth switching device MN1 and the first terminal of the sixth switching device MN2 are both gates, the second terminal of the fifth switching device MN1 and the second terminal of the sixth switching device MN2 are both drains, and the third terminal of the fifth switching device MN1 and the third terminal of the sixth switching device MN2 are both sources.

[0084] As can be seen, this optional embodiment can control the components of the drive control circuit 103 to operate in the constant current region based on the stable current provided by the third current adjustment module 1012 and the fourth current adjustment module 1013 through the voltage feedback module 1011. This can improve the control accuracy of the drive circuit 10 operating in the constant current region, thereby improving the adjustment accuracy of the common mode feedback adjustment network 101 on the common mode voltage. In turn, it can improve 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 used to drive the passive mixer for upconversion in this embodiment of the invention is as follows:

[0086] In this embodiment of the invention, after the power supply is powered on, when the first input signal and the second input signal are connected, the first input signal controls the first switching device MP1 and the third switching device MP3 to turn on, and the second input signal controls the second switching device MP2 to turn on. At this time, the first input signal is amplified by the first switching device MP1 under the action of the first current source C2 and by the third switching device MP3 under the action of the third current source C1. The second input signal is amplified by the second switching device MP2 under the action of the second current source C5 and by the fourth switching device MP4 under the action of the fourth current source C6. The first input signal amplified by the third switching device MP3 is used as the first drive control signal and the second input signal amplified by the fourth switching device MP4 is used as the second drive control signal to control the passive mixer 20 to work. This is beneficial to improve the mixing gain of the passive mixer 20 through the drive control of the source follower of the PMOS transistor and to reduce the gain loss of the passive mixer 20. Subsequently, the first resistor R in parallel is connected to the second input signal. SP and the first capacitor C SP The first input signal, amplified by the first switching device MP1, is filtered, and then processed by the second resistor R connected in parallel. SN Second capacitor C SNThe first input signal, amplified by the second switching device MP2, is filtered. Operational amplifier OP1, based on the input reference voltage, processes the common-mode voltage generated by the filtered first and second input signals to obtain a voltage control signal. This voltage control signal then controls the conduction of the fifth and sixth switching devices MN1 and MN2. The fifth switching device MN1 regulates the voltage of the first input signal, and the sixth switching device MN2 regulates the voltage of the second input signal. This ensures that the output voltages of the first and second input signals follow and remain within a given range, improving the stability of the common-mode voltage generated by the first and second input signals. This, in turn, improves the linearity of the drive signal based on the first and second input signals, and consequently reduces the impact of the high-linearity drive signal on the noise, bandwidth, and linearity of the mixing system containing the passive mixer 20. For example: Figure 4 As shown, Figure 4 This is a schematic diagram illustrating the relationship between voltage attenuation and bandwidth characteristics of a passive mixer architecture based on a source follower, as disclosed in an embodiment of the present invention. This passive mixer architecture using a source follower can effectively increase the signal channel bandwidth to the 500MHz level; for example... Figure 5 As shown, Figure 5 This is a schematic diagram illustrating the relationship between the output linearity of a source follower and the output linearity of a passive mixer, as disclosed in an embodiment of the present invention. It can control the voltage gain within 5dB, and within the input signal range of 0dBm, the linearity of the entire mixer architecture can reach below EVM-60dB. In other words, by setting up a passive mixer architecture based on a source follower, it is beneficial to improve the overall linearity of the architecture. Figure 6 As shown, Figure 6 This is a schematic diagram showing the relationship between the output impedance characteristics of a passive mixer architecture based on a source follower disclosed in an embodiment of the present invention. By setting a source follower, it is beneficial to achieve a low output impedance of the passive mixer.

[0087] Example 2

[0088] Please see Figure 7 , Figure 7 This is a schematic diagram of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention. Figure 7 The described circuit for driving a passive mixer to perform upconversion can be applied to electronic products that drive the passive mixer 20 to perform upconversion; however, this embodiment of the invention is not limited thereto. Figure 7As shown, the circuit for driving a passive mixer to perform upconversion includes a drive circuit 10 and a voltage bias circuit 40. The voltage bias circuit 40 is used to control the components in the drive circuit 10 to be at the required operating potential. The voltage bias circuit 40 includes a filter attenuation module 401, a fifth current adjustment module 402, and a sixth current adjustment module 403.

[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 drive 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 drive circuit 10, and is used to receive the second input signal. The second ends of the fifth current regulation module 402 and the second ends of the sixth current regulation module 403 are both grounded.

[0090] In specific embodiments of the present invention, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of a voltage bias circuit disclosed in an embodiment of the present invention, as shown below. Figure 8 As shown, the fifth current adjustment module 402 includes a seventh current source C_Shift_IP, the sixth current adjustment module 403 includes an eighth current source C_Shift_IN, and the filter attenuation module 401 includes an eighth resistor R. S_IP Ninth resistor R S_IN At least two tenth resistors connected in series (e.g.) Figure 8 R in 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 text), where:

[0091] Eighth resistor R S_IP One end is electrically connected to one end of the tenth resistor, one end of the fourth capacitor, the first end of the seventh current source C_Shift_IP, and the first resistor R of the voltage feedback module 1011 in the drive circuit 10. SP At the other end, the eighth resistor R S_IP The other end is used to connect to the first input signal, the ninth resistor R S_IN One end 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 At the other end, the ninth resistor R S_INThe other end is used to connect to the second input signal. 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 used to ground. By setting the voltage bias circuit 40, the voltage fluctuation range of each component (such as MOSFET) in the drive circuit 10 can be handled, ensuring that each component in the drive circuit 10 is at the required operating potential.

[0092] In an optional embodiment, such as Figure 9 As shown, Figure 9 This is a schematic diagram of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention. Figure 9 As shown, the circuit for driving the passive mixer for upconversion also includes a passive mixer 20. The first terminal of the passive mixer 20 is electrically connected to the second terminal of the first source follower 10311, the second terminal of the passive mixer 20 is electrically connected to the second terminal of the second source follower 10321, the third terminal of the passive mixer 20 is used to input the local oscillator signal, and the fourth terminal of the passive mixer 20 is electrically connected to the radio frequency circuit 30. The local oscillator signal is the signal output by the local oscillator (LO), and it can also be a differential signal, meaning that the first and second local oscillator signals included in the local oscillator signal also constitute a differential signal. Optionally, the local oscillator signal can be an in-phase signal or a quadrature signal. Specifically, when the first and second input signals are in-phase signals, the local oscillator signal is also an in-phase signal; when the first and second input signals are quadrature signals, the local oscillator signal is also a quadrature signal. This allows for the drive control of the passive mixer 20 via the first drive control signal output from the third switching device MP3 in the first source follower 10311, the second drive control signal output from the fourth switching device MP4 in the second source follower 10321, and the input local oscillator signal. This enables the passive mixer 20 to upconvert the frequency of the RF circuit 30. This improves the accuracy of drive control of the passive mixer 20 based on the first drive control signal, the second drive control signal, and the local oscillator signal, and also enhances the mixing gain of the passive mixer 20. Consequently, it improves the upconversion accuracy of the passive mixer 20, and ultimately enhances the communication accuracy of the RF circuit 30.

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

[0094] The fourth terminal of the passive mixer 20 is electrically connected to the first terminal of the adder P, and the second terminal of the adder P is used to electrically connect to the radio frequency circuit 30.

[0095] For example, such as Figure 10 As shown, Figure 10 This is a schematic diagram of the overall structure of a circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention. When the number of circuits for driving the passive mixer to perform upconversion is 2 (e.g., ...), ... Figure 10 When the circuit includes the I_Path branch and Q_path branch, the number of passive mixers 20 is also 2, that is, the circuit includes a first passive mixer 20 and a second passive mixer 20. The first passive mixer 20 can be driven and controlled by the local oscillator signal of the in-phase component and the drive control signal of the in-phase component. The drive control signal of the in-phase component includes a first drive control signal based on the first input signal of the in-phase component and a second drive 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 drive control signal of the quadrature component. The drive control signal of the quadrature component includes a first drive control signal based on the first input signal of the quadrature component and a second drive control signal based on the second input signal of the quadrature component.

[0096] For example, such as Figure 11 As shown, Figure 11 This is a schematic diagram of the overall structure of another circuit for driving a passive mixer to perform upconversion, as disclosed in an embodiment of the present invention. The number of circuits used to drive the passive mixer to perform upconversion is 3 (e.g., ...). Figure 8 When the circuit includes the I_Path branch, 45°_Path branch, and Q_path branch, the number of passive mixers 20 is also 3, meaning the circuit also includes a third passive mixer 20 (such as...). Figure 8 The third passive mixer 20 can be driven and controlled by a local oscillator signal offset by 45 degrees relative to the in-phase component and 45 degrees relative to the quadrature component, and a drive control signal offset by 45 degrees relative to the in-phase component and 45 degrees relative to the quadrature component.

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

[0098] The first pole of the seventh switching device and the first pole of the tenth switching device are used to connect the first local oscillator signal of the in-phase component (i.e.) Figure 12 In the LO_IP, the first pole of the eighth switching device and the first pole of the ninth switching device are used to connect the second local oscillator signal of the in-phase component (i.e., Figure 12 In the context of LO_IN), the second terminals of the seventh and eighth switching devices are used to connect the second input signal of the in-phase component (i.e., LO_IN). Figure 9 In the IF_IN section, the second terminals of the ninth and tenth switching devices are used to connect the first input signal of the in-phase component (i.e., ...). Figure 12 In the IF_IP (i.e., the first pole of the eleventh switch and the first pole of the fourteenth switch are both used to connect the first local oscillator signal of the quadrature component (i.e., ...) Figure 12 In the LO_QP, the first pole of the twelfth switch and the first pole of the thirteenth switch are both used to connect the second local oscillator signal of the quadrature component (i.e., Figure 12 In the LO_QN configuration, the second terminals of the eleventh and twelfth switches are used to receive the first input signal of the quadrature component, the second terminals of the thirteenth and fourteenth switches are used to receive the second input signal of the quadrature component, and the third terminals of the seventh, ninth, eleventh, and thirteenth switches are used to output the first radio frequency signal (i.e., LO_QN). Figure 12 In the context of RF_ON), ​​the first radio frequency signal can be input to the first input terminal of adder P. The third terminals of the eighth, tenth, twelfth, and fourteenth switching devices are all used to output the second radio frequency signal (i.e., Figure 12 (RF_OP in the text). By providing multiple optional passive mixers 20, it is beneficial to improve the gain of the mixing system while enhancing the accuracy and flexibility of the drive control of the passive mixers 20, thereby improving the up-conversion accuracy and ultimately enabling the accurate communication function of the RF circuit 30.

[0099] It should be noted that, for the driving circuit 10, which 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 content in the above embodiment one, which will not be repeated here.

[0100] The working principle of the circuit used to drive the passive mixer for upconversion in this embodiment of the invention is as follows:

[0101] In this embodiment of the invention, after the power supply is powered on, when the input signal and local oscillator signal of each component are received, the drive control circuit 103, composed of source followers in the branch containing the component signal, outputs a drive control signal based on the input signal of that component. This drive control signal is then input to the passive mixer 20 in the branch containing the component signal. The passive mixer 20 performs mixing processing on the drive control signal and the local oscillator signal to obtain the radio frequency (RF) signal of that component. Subsequently, all RF signals of all components are input to the RF circuit 30 through adder P, so that... The radio frequency circuit 30 realizes the function of wireless communication by processing all components of the radio frequency signal. The drive control signal output by the drive control circuit 103 of each component signal branch can improve the accurate driving of the passive mixer 20 in that branch, which is beneficial to improve the gain of the passive mixer 20 and improve the linearity of the passive mixer 20. This is conducive to enabling the driven passive mixer 20 to accurately generate the corresponding radio frequency signal through the drive control signal and the local oscillator signal input to that branch, thereby contributing to the wireless communication function of the radio frequency circuit 30.

[0102] Example 3

[0103] Please see Figure 13 , Figure 13 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. Figure 13 The described electronic device is one that needs to drive a passive mixer 20 for upconversion. The electronic device includes a device body and also includes circuitry for driving the passive mixer for upconversion, as described in Embodiment 1 or Embodiment 2. It should be noted that for a detailed description of the circuitry for driving the passive mixer for upconversion, please refer to the specific descriptions in Embodiment 1 and Embodiment 2; this embodiment will not repeat them.

[0104] It is evident that implementation Figure 13The described electronic device, when a first input signal and a second input signal are received, directs the first and second input signals to a drive control circuit 103 and a common-mode voltage control circuit 102 via a common-mode feedback adjustment network 101, adjusts the common-mode voltage generated by the first and second input signals to obtain an adjusted common-mode voltage, and directs the adjusted common-mode voltage to the common-mode voltage control circuit 102 via the drive control circuit 103; the drive control circuit 103 outputs a drive control signal for the passive mixer 20 based on the first and second input signals to enable the passive mixer 20 to operate; the common-mode voltage control circuit 102 outputs a voltage control signal for the common-mode feedback adjustment network 101 based on the received adjusted common-mode voltage and reference voltage; and the common-mode feedback adjustment network 101 controls the common-mode voltage to be in a regulated state based on the received voltage control signal. This is achieved by setting a drive circuit 10 (drive...) before the passive mixer 20. The drive circuit 10 includes a common-mode feedback adjustment network 101, a common-mode voltage control circuit 102, and a drive control circuit 103. Specifically, the drive control signal output by the drive control circuit 103 enables precise driving of the passive mixer 20, which is beneficial for improving the mixing gain of the passive mixer 20 based on the drive control circuit 103, and for reducing the gain loss of the passive mixer 20. Furthermore, the voltage limitation of the differential signal input to the drive control circuit 103 by the common-mode voltage control circuit 102 and the common-mode feedback adjustment network 101 helps improve the stability of the common-mode voltage of the differential signal, thereby improving the linearity of the output drive control signal. This, in turn, helps reduce the impact of the high-linearity drive control signal on the noise, bandwidth, and linearity of the mixing system containing the passive mixer 20. In other words, it reduces the noise at the output of the passive mixer 20, expands the bandwidth of the passive mixer 20, and improves 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 to perform upconversion disclosed in the embodiments of the present invention are merely preferred embodiments of the present invention and are only used to illustrate the technical solutions of the present invention, not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate 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 to perform upconversion, characterized in that, The circuit includes 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: The first terminal of the common-mode feedback adjustment network (101) is electrically connected to the first terminal of the drive control circuit (103) and is used to receive a first input signal. The second terminal of the common-mode feedback adjustment network (101) is electrically connected to the second terminal of the drive control circuit (103) and is used to receive a second input signal. The third terminal of the common-mode feedback adjustment network (101) is electrically connected to the first terminal of the common-mode voltage control circuit (102). The third terminal of the drive control circuit (103) is electrically connected to the second terminal of the common-mode voltage control circuit (102). The fourth terminal of the drive control circuit (103) is electrically connected to the first terminal of the common-mode voltage control circuit (102). The third terminal of the common-mode voltage control circuit (102) is electrically connected to the third terminal, and the fifth terminal of the drive control circuit (103) is electrically connected to the passive mixer (20), and the passive mixer (20) is electrically connected to the radio frequency circuit (30). The fourth terminal of the common-mode voltage control circuit (102) is used to connect to the reference voltage. The fourth terminal of the common-mode feedback adjustment network (101), the fifth terminal of the common-mode voltage control circuit (102) and the sixth terminal of the drive control circuit (103) are electrically connected to the power supply. The first input signal and the second input signal constitute a differential signal. The common-mode feedback adjustment network (101) is used to, when the first input signal and the second input signal are received, direct the first input signal and the second input signal to the drive control circuit (103) and the common-mode voltage control circuit (102), 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 (102) through the drive control circuit (103). The drive control circuit (103) is used to output a drive 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. The common-mode voltage control circuit (102) is used to output a voltage control signal for the common-mode feedback adjustment network (101) based on 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 regulated state according to the received voltage control signal.

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

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

4. The circuit for driving a passive mixer to perform upconversion according to claim 3, characterized in that, The common-mode voltage control circuit (102) further includes a common-mode voltage compensation module (1023), which includes a third resistor (R). EPN ) and the third capacitor (C EPN ),in: The third resistor (R) EPN One end of ) is respectively connected to the 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 of the capacitor and the second capacitor (C) SN The other end of the third resistor (R) is electrically connected. EPN The other end of the capacitor is electrically connected to the third capacitor (C). EPN One end of the third capacitor (C) EPN The other end is used for electrical connection to the power supply; The common-mode voltage compensation module (1023) is used to compensate the adjusted common-mode voltage so that the voltage of each component flowing through the common-mode voltage control circuit (102) remains constant.

5. The circuit for driving a passive mixer to perform upconversion according to claim 3 or 4, characterized in that, The drive control circuit (103) includes a first drive control module (1031) and a second drive control module (1032). The first drive control module (1031) includes a first source follower (10311), a first auxiliary amplifier (10312), and a first current regulation module (10313). The second drive control module (1032) includes a second source follower (10321), a second auxiliary amplifier (10322), and a second current regulation module (10323), wherein: The first terminal of the first source follower (10311) and the first terminal of the first auxiliary amplifier (10312) are both electrically connected to the first terminal of the common-mode feedback adjustment network (101). The second terminal of the second source follower (10321) and the first terminal of the second auxiliary amplifier (10322) are both electrically connected to the second terminal of the common-mode feedback adjustment network (101). The second terminals of the first source follower (10311) and the second terminal of the second source follower (10321) are both used to electrically connect to the passive mixer (20). The second terminal of the first auxiliary amplifier (10312) is electrically connected to one end of the first resistor (RSP) in the common-mode voltage control circuit (102) and the first terminal of the first current adjustment module (10313). The second terminal 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 terminal of the second current adjustment module (10323). The third terminal of the first source follower (10311), the third terminal of the second source follower (10321), the second terminal of the first current adjustment module (10313), and the second terminal of the second current adjustment module (10323) are all used to electrically connect to the power supply. The fourth terminal of the first source follower (10311), the fourth terminal of the second source follower (10321), the third terminal of the first auxiliary amplifier (10312), and the third terminal of the second auxiliary amplifier (10322) are all used to ground. The first drive control module (1031) is used to output a first drive 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, the drive control signal including the first drive control signal and the second drive control signal.

6. The circuit for driving a passive mixer to perform upconversion according to claim 5, characterized in that, The common-mode feedback adjustment network (101) includes a voltage feedback module (1011), a third current regulation module (1012), and a fourth current regulation module (1013), wherein: The first terminal of the voltage feedback module (1011) is electrically connected to the first terminal of the first source follower (10311), the first terminal of the first auxiliary amplifier (10312), and the first terminal of the third current adjustment module (1012), and is used to receive a first input signal. The second terminal of the voltage feedback module (1011) is electrically connected to the second terminal of the second source follower (10321), the first terminal of the second auxiliary amplifier (10322), and the first terminal of the fourth current adjustment module (1013), and is used to receive a second input signal. The third terminal of the voltage feedback module (1011) is electrically connected to the output terminal of the voltage operational amplifier module (1022) in the common-mode voltage control circuit (102). The second terminals of the third current adjustment module (1012) and the fourth current adjustment module (1013) are both used to electrically connect to the power supply. The fourth terminal of the voltage feedback module (1011) is used to ground. The voltage feedback module (1011) is used to control the components of the drive control circuit (103) to operate in the 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 to perform upconversion according to claim 6, characterized in that, The circuit further includes a voltage bias circuit (40), which is used to control each component in the drive circuit (10) to be at the required operating potential. The voltage bias circuit (40) includes a filter attenuation module (401), a fifth current adjustment module (402), and a sixth current adjustment module (403). The first end of the filter attenuation module (401) 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 drive circuit (10), and is used to access the first input signal. The second end of the filter attenuation module (401) 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 drive circuit (10), and is used to access the second input signal. The second ends of the fifth current regulation module (402) and the sixth current regulation module (403) are both grounded.

8. The circuit for driving a passive mixer to perform upconversion according to claim 7, characterized in that, The circuit also includes the 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 receive the local oscillator signal, and the fourth end of the passive mixer (20) is used to be electrically connected to the radio frequency circuit (30).

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

10. An electronic device, the electronic device comprising a device body, characterized in that, The electronic device further includes the circuitry for driving a passive mixer to perform upconversion as described in any one of claims 1-9.

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