CN117728768B - Orthogonal active double-balanced mixer, chip and Internet of things equipment - Google Patents
Orthogonal active double-balanced mixer, chip and Internet of things equipment Download PDFInfo
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Abstract
The invention relates to the technical field of circuit signal processing, and particularly discloses a quadrature active double-balanced mixer, a chip and Internet of things equipment, which comprises the following components: the transconductance module comprises a first switching tube and a second switching tube, the switching module comprises a first frequency modulation module, a second frequency modulation module, a third frequency modulation module and a fourth frequency modulation module, and the load module comprises a resistor R1, a resistor R2, a resistor R3 and a resistor R4; the transconductance module is used for converting an input voltage signal into a current signal, the switching module is used for carrying out differential conversion on the current signal and the orthogonal differential signal to generate a local oscillation differential signal, the load module is used for converting the local oscillation differential signal into an output voltage signal, the interference capacity is improved through differential conversion, and noise interference is reduced.
Description
Technical Field
The invention relates to the technical field of circuit signal processing, in particular to a quadrature active double-balanced mixer, a chip and Internet of things equipment.
Background
With the increasing maturity of scientific technology, modern communication systems realize the crossing of various technologies, from original analog modulation signal communication, narrowband voice communication and wired transmission communication to digital modulation signal communication, broadband integrated service communication and wireless mobile communication, and electronic communication systems are more and more abundant.
The mixers are classified into passive mixers and active mixers. Passive mixers have less flicker noise and high linearity due to no quiescent current flowing through the switching mixer stage, but suffer from the disadvantage of not providing conversion gain. It is generally necessary to connect a transimpedance amplifier after the passive mixer, which increases the complexity, power consumption, area and cost of the design. The active mixer realizes the mixing function by using an active device, the double-balance Gilbert mixer is the most widely used active mixer structure at present, the double-balance mixer realizes the mixing by using a multiplication function, and can inhibit interference signals, but has poorer anti-interference capability and relatively higher noise.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide the orthogonal active double-balanced mixer, which realizes that the influence of external noise and interference in the signal transmission process is reduced and the anti-interference capability of the orthogonal active double-balanced mixer is improved through differential input and differential output.
In a first aspect, embodiments of the present invention provide an orthogonal active double balanced mixer, comprising: the transconductance module comprises a first switching tube and a second switching tube, the switching module comprises a first frequency modulation module, a second frequency modulation module, a third frequency modulation module and a fourth frequency modulation module, and the load module comprises a resistor R1, a resistor R2, a resistor R3 and a resistor R4;
The transconductance module is used for converting an input voltage signal into a current signal, wherein the input voltage signal comprises a first input voltage signal and a second input voltage signal;
The switching module is used for carrying out differential conversion on the current signal and the orthogonal differential signal to generate a local oscillation differential signal, wherein the orthogonal differential signal comprises a first orthogonal differential signal, a second orthogonal differential signal, a third orthogonal differential signal and a fourth orthogonal differential signal;
The load module is used for converting the local oscillation differential signal into an output voltage signal, wherein the output voltage signal comprises a first output voltage signal, a second output voltage signal, a third output voltage signal and a fourth output voltage signal;
The first switching tube is connected with a first input voltage signal, and the second switching tube is connected with a second input voltage signal; the first frequency modulation module is connected with the first orthogonal differential signal and the second orthogonal differential signal, the second frequency modulation module is connected with the first orthogonal differential signal and the second orthogonal differential signal, the third frequency modulation module is connected with the third orthogonal differential signal and the fourth orthogonal differential signal, and the fourth frequency modulation module is connected with the third orthogonal differential signal and the fourth orthogonal differential signal; the resistor R1 is connected with the first orthogonal differential signal, the resistor R2 is connected with the second orthogonal differential signal, the resistor R3 is connected with the third orthogonal differential signal, and the resistor R4 is connected with the fourth orthogonal differential signal.
In one embodiment of the present invention, the transconductance module includes a first switching tube and a second switching tube, where the first switching tube includes a triode M1 and the second switching tube includes a triode M2;
the base electrode of the triode M1 is connected with a first input voltage signal, the emitter electrode is grounded, and the collector electrode switch module is connected;
the base electrode of the triode M2 is connected with a second input voltage signal, the emitter electrode is grounded, and the collector electrode is connected with the switch module.
In one embodiment of the present invention, the switch module includes a first frequency modulation module, a second frequency modulation module, a third frequency modulation module, and a fourth frequency modulation module, where the first frequency modulation module includes a triode M3 and a triode M4, the second frequency modulation module includes a triode M5 and a triode M6, the third frequency modulation module includes a triode M7 and a triode M8, and the fourth frequency modulation module includes a triode M9 and a triode M10;
The base electrode of the triode M3 and the base electrode of the triode M6 are connected with a first orthogonal differential signal, the emitter electrode of the triode M3 is connected with the emitter electrode of the triode M4 and the collector electrode of the triode M1, and the collector electrode of the triode M3 is connected with the collector electrode of the triode M5 and the load module;
the base electrode of the triode M4 and the base electrode of the triode M5 are connected with a second orthogonal differential signal, and the collector electrode of the triode M4 is connected with the collector electrode of the triode M6 and the load module;
the emitter of the triode M5 is connected with the emitter of the triode M6 and the collector of the triode M2;
The base electrode of the triode M7 and the base electrode of the triode M10 are connected with a third orthogonal differential signal, the emitter electrode of the triode M7 is connected with the emitter electrode of the triode M8 and the collector electrode of the triode M1, and the collector electrode of the triode M7 is connected with the collector electrode of the triode M9 and the load module;
the base electrode of the triode M8 and the base electrode of the triode M9 are connected with a fourth orthogonal differential signal, and the collector electrode of the triode M8 is connected with the collector electrode of the triode M10 and the load module;
the emitter of the triode M9 is connected with the emitter of the triode M10 and the collector of the triode M2.
In one embodiment of the invention, the load module comprises a resistor R1, a resistor R2, a resistor R3, and a resistor R4;
One end of the resistor R1 is connected with the first differential output signal, the collector of the triode M3 and the collector of the triode M5;
One end of the resistor R2 is connected with the second differential output signal, the collector of the triode M4 and the collector of the triode M6;
One end of the resistor R3 is connected with the third differential output signal, the collector of the triode M7 and the collector of the triode M9;
one end of the resistor R4 is connected with a fourth differential output signal, the collector of the triode M8 and the collector of the triode M10;
The other end of the resistor R1 is connected to the other end of the resistor R2, the other end of the resistor R3, and the other end of the resistor R4.
In one embodiment of the present invention, the first voltage input signal and the second voltage input signal are mixed with the first quadrature differential signal, the second quadrature differential signal, the third quadrature differential signal, and the fourth quadrature differential signal to generate a first differential output signal, a second differential output signal, a third differential output signal, and a fourth differential output signal.
In one embodiment of the invention, the first voltage input signal, the first orthogonal differential signal and the second orthogonal differential signal are subjected to differential conversion to generate a first differential output signal; the second voltage input signal, the first orthogonal differential signal and the second orthogonal differential signal are subjected to differential conversion to generate a second differential output signal; the first voltage input signal, the third orthogonal differential signal and the fourth orthogonal differential signal are subjected to differential conversion to generate a third differential output signal; the second voltage input signal, the third orthogonal differential signal and the fourth orthogonal differential signal are subjected to differential conversion to generate a fourth differential output signal.
In one embodiment of the present invention, the first voltage input signal and the second voltage input signal are intermediate frequency signals, and the first differential output signal, the second differential output signal, the third differential output signal, and the fourth differential output signal are high frequency signals.
In one embodiment of the present invention, the other end of the resistor R1 is connected to the other end of the resistor R2, the other end of the resistor R3, the other end of the resistor R4, and the dc power input port.
In order to solve the technical problem, the embodiment of the invention provides a chip, which comprises the quadrature active double-balanced mixer of the first aspect.
In order to solve the above technical problems, a third aspect of the present invention provides an internet of things device, including a chip of the second aspect.
The embodiment of the invention has the following beneficial effects:
The first switching tube in the transconductance module is connected with a first input voltage signal, the second switching tube is connected with a second input voltage signal, and the first switching tube and the second switching tube convert the first input voltage signal and the second input voltage signal into current signals, so that noise of the voltage signals can be reduced; the four frequency modulation modules of the switch module perform differential conversion on the current signal, the first quadrature differential signal, the second quadrature differential signal, the third quadrature differential signal and the fourth quadrature differential signal to generate local oscillation differential signals, and the quadrature differential signals can counteract noise in the mixing process and can keep the mixed signals relatively independent in frequency spectrum, so that the anti-interference capability of the signals is improved; the load module converts the local oscillation differential signals into first differential output voltage signals, second differential output voltage signals, third differential output voltage signals and fourth differential output voltage signals through four resistors, the anti-interference capability of the output four paths of voltage signals is improved, and noise is low.
Drawings
In order to more clearly describe the technical solutions in the embodiments or the background of the present invention, the drawings used in the embodiments or the background of the present invention will be described below.
FIG. 1 is a circuit block diagram of a quadrature active double balanced mixer provided by an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a frequency modulation module according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of an orthogonal active double balanced mixer according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the present invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, result, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a circuit block diagram of a quadrature active double-balanced mixer according to an embodiment of the present invention, where the quadrature active double-balanced mixer includes: the transconductance module 101, the switch module 102 and the load module 103, wherein, transconductance module 101 includes switch tube 1 and switch tube 2, and switch module 102 includes frequency modulation module 1, frequency modulation module 2, frequency modulation module 3, frequency modulation module 4, and load module 103 includes resistance 1, resistance 2, resistance 3, resistance 4.
The first input voltage signal 1011 is connected to the switching tube 1, the second input voltage signal 1012 is connected to the switching tube 2, and the first input voltage signal 1011 and the second input voltage signal 1012 are input from the transconductance module 101; the first orthogonal differential signal 1021 is connected with the frequency modulation module 1 and the frequency modulation module 2, the second orthogonal differential signal 1022 is connected with the frequency modulation module 1 and the frequency modulation module 2, the third orthogonal differential signal 1023 is connected with the frequency modulation module 3 and the frequency modulation module 4, the fourth orthogonal differential signal 1024 is connected with the frequency modulation module 3 and the frequency modulation module 4, and the first orthogonal differential signal 1021, the second orthogonal differential signal 1022, the third orthogonal differential signal 1023 and the fourth orthogonal differential signal 1024 are input from the switch module 102; the first output voltage signal 1031 is connected to the resistor 1, the second output voltage signal 1032 is connected to the resistor 2, the third output voltage signal 1033 is connected to the resistor 3, the fourth output voltage signal 1034 is connected to the resistor 4, and the first output voltage signal 1031, the second output voltage signal 1032, the third output voltage signal 1033, and the fourth output voltage signal 1034 are output from the load module 103.
The transconductance module 101 is configured to convert the first input voltage signal 1011 and the second input voltage signal 1012 into current signals, the switch module 102 is configured to perform differential conversion on the current signals and the first quadrature differential signal 1021, the second quadrature differential signal 1022, the third quadrature differential signal 1023, and the fourth quadrature differential signal 1024 to generate local oscillation differential signals, and the load module 103 is configured to convert the local oscillation differential signals into first output voltage signals 1031, second output voltage signals 1032, third output voltage signals 1033, and fourth output voltage signals 1034.
In the embodiment of the present application, the switching tube 1 and the switching tube 2 may be transistors, field effect transistors, or three-stage transistors, and the present application will be mainly described by taking the switching tube 1 and the switching tube 2 as examples.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a frequency modulation module according to an embodiment of the present invention, where the frequency modulation module includes a triode 1 and a triode 2, an emitter of the triode 1 is connected to an emitter of the triode 2, a current signal 201 flows into the two triodes from a junction between the emitter of the triode 1 and the emitter of the triode 2, a base of the triode 1 is connected to a first differential signal 202, and a base of the triode 2 is connected to a second differential signal 203. The current signal 201 is input from the emitter of the transistor 1 and the emitter of the transistor 2, the first differential signal 202 is input from the base of the transistor 1, and the second differential signal 203 is input from the base of the transistor 2. The current signal 201 and the first differential signal 202 pass through the triode 1 and then output a first local oscillation differential signal 2011 from the collector of the triode 1, and the current signal 201 and the second differential signal 203 pass through the triode 2 and then output a second local oscillation differential signal 2012 from the collector of the triode 2.
It should be noted that, the first differential signal 202 and the second differential signal 203 are both orthogonal differential signals.
It can be seen that, because the orthogonal differential signals have the characteristic of ninety degrees of phase difference, noise interference can be counteracted in the mixing process, and because the orthogonal differential signals are mutually independent, the mixed signals are mutually independent in frequency spectrum, so that the anti-interference capability of the signals can be improved, and interference with other signals can be reduced.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an orthorhombic active double balanced mixer according to an embodiment of the present invention, where the orthorhombic active double balanced mixer includes a transconductance circuit 301, a switching circuit 302 and a load circuit 303, where the transconductance circuit 301 corresponds to the transconductance module 101, the switching circuit 302 corresponds to the switching module 102, and the load circuit 303 corresponds to the load module 103.
In this embodiment, the transconductance circuit 301 includes a transistor M1 and a transistor M2, where a base electrode of the transistor M1 is connected to the first input voltage signal 1011, an emitter electrode is grounded, and a collector electrode is connected to emitters of the transistors M3, M4, M7, and M8 of the switching circuit 302; the base of the transistor M2 is connected to the second input voltage signal 1012, the emitter is grounded, and the collector is connected to the emitters of the transistors M5, M6, M9, M10 of the switching circuit 302. A first input voltage signal 1011 is input from the base of transistor M1 and a second input voltage signal 1012 is input from the base of transistor M2.
It can be seen that the two triodes of the transconductance circuit are respectively connected with different input voltage signals, namely, one triode corresponds to one input voltage signal, one input voltage signal is converted into two current signals through one triode, the triode has higher amplification factor, the input signal can be amplified to higher current level, the proportion of the signal and noise is effectively improved, the influence of the noise on the signal is reduced, the voltage signal is converted into the current signal, the gain of the signal can be improved by utilizing the high current amplification factor of the triode, and therefore, the signal is better transmitted and processed.
The switch circuit 302 includes a triode M3, a triode M4, a triode M5, a triode M6, a triode M7, and a triode M8, wherein a base electrode of the triode M3 and a base electrode of the triode M6 are connected with a first orthogonal differential signal 1021, an emitter electrode of the triode M3 is connected with an emitter electrode of the triode M4 and a collector electrode of the triode M1, and a collector electrode of the triode M3 is connected with a collector electrode of the triode M5 and one end of an R1 of the load circuit 303; the base electrode of the triode M4 and the base electrode of the triode M5 are connected with a second orthogonal differential signal 1022, and the collector electrode of the triode M4 is connected with the collector electrode of the triode M6 and one end of R2 of the load circuit 303; the emitter of the triode M5 is connected with the emitter of the triode M6 and the collector of the triode M2; the base electrode of the triode M7 and the base electrode of the triode M10 are connected with a third orthogonal differential signal 1023, the emitter electrode of the triode M7 is connected with the emitter electrode of the triode M8 and the collector electrode of the triode M1, and the collector electrode of the triode M7 is connected with the collector electrode of the triode M9 and one end of R3 of the load circuit 303; the base electrode of the triode M8 and the base electrode of the triode M9 are connected with a fourth orthogonal differential signal 1024, and the collector electrode of the triode M8 is connected with the collector electrode of the triode M10 and one end of R4 of the load circuit 303; the emitter of the triode M9 is connected with the emitter of the triode M10 and the collector of the triode M2. The first orthogonal differential signal 1021 is input from the base of transistor M3 and the base of transistor M6, the second orthogonal differential signal 1022 is input from the base of transistor M4 and the base of transistor M5, the third orthogonal differential signal 1023 is input from the base of transistor M7 and the base of transistor M10, and the fourth orthogonal differential signal 1024 is input from the base of transistor M8 and the base of transistor M9.
It can be seen that the current signal and the quadrature differential signal can be subjected to frequency modulation through the switch circuit, because the quadrature differential signal has the characteristic of ninety degrees of phase difference, noise interference can be counteracted in the mixing process, and because the quadrature differential signals are mutually independent, the mixed signals are mutually independent in frequency spectrum, the anti-interference capability of the signals can be improved, and interference with other signals can be reduced.
The load circuit 303 includes a resistor R1, a resistor R2, a resistor R3, and a resistor R4, where one end of the resistor R1 is connected to the first output voltage signal 1031, the collector of the triode M3, and the collector of the triode M5; one end of the resistor R2 is connected with the second output voltage signal 1032, the collector of the triode M4 and the collector of the triode M6; one end of the resistor R3 is connected with the third output voltage signal 1033, the collector of the triode M7 and the collector of the triode M9; one end of the resistor R4 is connected with the fourth output voltage signal 1034, the collector of the triode M8 and the collector of the triode M10; the other end of the resistor R1 is connected to the other end of the resistor R2, the other end of the resistor R3, and the other end of the resistor R4. The first output voltage signal 1031 is output from one end of R1, the second output voltage signal 1032 is output from one end of R2, the third output voltage signal 1033 is output from one end of R3, and the fourth output voltage signal 1034 is output from one end of R4.
The other end of the resistor R1 is connected to the other end of the resistor R2, the other end of the resistor R3, the other end of the resistor R4, and the dc power input port. The direct current power supply is connected with the input from the other end of the R1, the other end of the resistor R2, the other end of the resistor R3 and the other end of the resistor R4.
In an alternative embodiment, the first input voltage signal 1011, the second input voltage signal 1012 are mixed with the first quadrature differential signal 1021, the second quadrature differential signal 1022, the third quadrature differential signal 1023, and the fourth quadrature differential signal 1024 to generate a first output voltage signal 1031, a second output voltage signal 1032, a third output voltage signal 1033, and a fourth output voltage signal 1034, wherein the first input voltage signal 1011, the first quadrature differential signal 1021, and the second quadrature differential signal 1022 are subjected to differential conversion to generate the first output voltage signal 1031; the second input voltage signal 1012, the first orthogonal differential signal 1021 and the second orthogonal differential signal 1022 are subjected to differential conversion to generate a second output voltage signal 1032; the first input voltage signal 1011, the third orthogonal differential signal 1023 and the fourth orthogonal differential signal 1024 are subjected to differential conversion to generate a third output voltage signal 1033; the second input voltage signal 1012, the third orthogonal differential signal 1023 and the fourth orthogonal differential signal 1024 are subjected to differential conversion to generate a fourth output voltage signal 1034.
The first input voltage signal 1011 and the second input voltage signal 1012 are intermediate frequency signals, and the first output voltage signal 1031, the second output voltage signal 1032, the third output voltage signal 1033, and the fourth output voltage signal 1034 are high frequency signals.
In one possible embodiment, an embodiment of the present invention provides a chip comprising the quadrature active double balanced mixer provided by any of the above embodiments.
In one possible embodiment, the present invention provides an internet of things device, which includes the quadrature active double-balanced mixer or the chip provided in any one of the above embodiments.
In summary, two paths of input voltage signals are converted into four paths of current signals, the four paths of current signals and four paths of orthogonal differential signals are subjected to frequency modulation, finally, the mixed current signals are converted into voltage signals, four paths of output voltage signals are generated, and the influence from external noise and interference can be reduced through differential input and differential output, so that the anti-interference capability of the mixer can be enhanced.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
The foregoing has outlined rather broadly the more detailed description of the embodiments of the application in order that the detailed description of the principles and embodiments of the application may be implemented in conjunction with the detailed description of the embodiments that follows, the claims being merely intended to facilitate the understanding of the method and concepts underlying the application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present application, the present disclosure should not be construed as limiting the present application in summary.
Claims (8)
1. An orthogonally active double balanced mixer, comprising: the high-voltage power supply comprises a transconductance module, a switch module and a load module, wherein the transconductance module comprises a first switch tube and a second switch tube, the switch module comprises a first frequency modulation module, a second frequency modulation module, a third frequency modulation module and a fourth frequency modulation module, and the load module comprises resistors R1-R4;
The transconductance module is used for converting an input voltage signal into a current signal, wherein the input voltage signal comprises a first input voltage signal and a second input voltage signal;
The switch module is used for performing differential conversion on the current signal and an orthogonal differential signal to generate a local oscillation differential signal, wherein the orthogonal differential signal comprises a first orthogonal differential signal, a second orthogonal differential signal, a third orthogonal differential signal and a fourth orthogonal differential signal;
the load module is used for converting the local oscillation differential signal into an output voltage signal, wherein the output voltage signal comprises a first output voltage signal, a second output voltage signal, a third output voltage signal and a fourth output voltage signal;
The first switching tube is connected with the first input voltage signal, and the second switching tube is connected with the second input voltage signal; the first frequency modulation module is connected with the first orthogonal differential signal and the second orthogonal differential signal, the second frequency modulation module is connected with the first orthogonal differential signal and the second orthogonal differential signal, the third frequency modulation module is connected with the third orthogonal differential signal and the fourth orthogonal differential signal, and the fourth frequency modulation module is connected with the third orthogonal differential signal and the fourth orthogonal differential signal; the resistor R1 is connected with the first orthogonal differential signal, the resistor R2 is connected with the second orthogonal differential signal, the resistor R3 is connected with the third orthogonal differential signal, and the resistor R4 is connected with the fourth orthogonal differential signal;
The switch module comprises a first frequency modulation module, a second frequency modulation module, a third frequency modulation module and a fourth frequency modulation module, wherein the first frequency modulation module comprises a triode M3 and a triode M4, the second frequency modulation module comprises a triode M5 and a triode M6, the third frequency modulation module comprises a triode M7 and a triode M8, and the fourth frequency modulation module comprises a triode M9 and a triode M10;
The base electrode of the triode M3 and the base electrode of the triode M6 are connected with the first orthogonal differential signal, the emitter electrode of the triode M3 is connected with the emitter electrode of the triode M4 and the base electrode of the triode M1, and the collector electrode of the triode M3 is connected with the collector electrode of the triode M5 and the load module;
the base electrode of the triode M4 and the base electrode of the triode M5 are connected with the second orthogonal differential signal, and the collector electrode of the triode M4 is connected with the collector electrode of the triode M6 and the load module;
The emitter of the triode M5 is connected with the emitter of the triode M6 and the base of the triode M2;
The base electrode of the triode M7 and the base electrode of the triode M10 are connected with the third orthogonal differential signal, the emitter electrode of the triode M7 is connected with the emitter electrode of the triode M8 and the base electrode of the triode M1, and the collector electrode of the triode M7 is connected with the collector electrode of the triode M9 and the load module;
the base electrode of the triode M8 and the base electrode of the triode M9 are connected with the fourth orthogonal differential signal, and the collector electrode of the triode M8 is connected with the collector electrode of the triode M10 and the load module;
the emitter of the triode M9 is connected with the emitter of the triode M10 and the base of the triode M2;
The load module comprises resistors R1-R4;
One end of the resistor R1 is connected with a first differential output signal, the collector of the triode M3 and the collector of the triode M5;
One end of the resistor R2 is connected with a second differential output signal, the collector of the triode M4 and the collector of the triode M6;
one end of the resistor R3 is connected with a third differential output signal, the collector of the triode M7 and the collector of the triode M9;
One end of the resistor R4 is connected with a fourth differential output signal, the collector of the triode M8 and the collector of the triode M10;
the other end of the resistor R1 is connected with the other end of the resistor R2, the other end of the resistor R3 and the other end of the resistor R4.
2. The quadrature active double balanced mixer of claim 1, wherein the transconductance module comprises a first switching tube and a second switching tube, wherein the first switching tube comprises a transistor M1 and the second switching tube comprises a transistor M2;
The base electrode of the triode M1 is connected with the first input voltage signal, the emitter electrode is grounded, and the collector electrode is connected with the switch module;
and the base electrode of the triode M2 is connected with the second input voltage signal, the emitter electrode is grounded, and the collector electrode is connected with the switch module.
3. The quadrature active double balanced mixer of claims 1-2, wherein the first input voltage signal, the second input voltage signal, and the first quadrature differential signal, the second quadrature differential signal, the third quadrature differential signal, and the fourth quadrature differential signal are mixed to generate the first differential output signal, the second differential output signal, the third differential output signal, and the fourth differential output signal.
4. The quadrature active double balanced mixer of claims 1-3, wherein the first input voltage signal is differentially converted from the first quadrature differential signal and the second quadrature differential signal to generate the first differential output signal; the second input voltage signal, the first orthogonal differential signal and the second orthogonal differential signal are subjected to differential conversion to generate a second differential output signal; the first input voltage signal, the third orthogonal differential signal and the fourth orthogonal differential signal are subjected to differential conversion to generate a third differential output signal; the second input voltage signal, the third orthogonal differential signal and the fourth orthogonal differential signal are subjected to differential conversion to generate the fourth differential output signal.
5. The quadrature active double balanced mixer of claims 1-4, wherein the first input voltage signal and the second input voltage signal are intermediate frequency signals, and the first differential output signal, the second differential output signal, the third differential output signal, and the fourth differential output signal are high frequency signals.
6. The quadrature active double balanced mixer of claim 1, wherein the other end of the resistor R1 is connected to the other end of the resistor R2, the other end of the resistor R3, and the other end of the resistor R4, and then connected to a dc power supply input port.
7. A chip comprising the quadrature active double balanced mixer of any of claims 1-6.
8. An internet of things device, characterized in that it comprises the quadrature active double balanced mixer of any of claims 1-6 or the chip of claim 7.
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| CN104569930A (en) * | 2014-12-29 | 2015-04-29 | 北京理工雷科电子信息技术有限公司 | Leakage signal cancellation circuit of linear frequency modulation continuous wave radar |
| CN114421990A (en) * | 2021-12-29 | 2022-04-29 | 北京时代民芯科技有限公司 | Quadrature demodulator chip |
| CN114421894A (en) * | 2021-12-02 | 2022-04-29 | 北京时代民芯科技有限公司 | Broadband quadrature mixer |
Family Cites Families (1)
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| US9431961B2 (en) * | 2014-10-29 | 2016-08-30 | Qualcomm Incorporated | Phase shifting mixer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569930A (en) * | 2014-12-29 | 2015-04-29 | 北京理工雷科电子信息技术有限公司 | Leakage signal cancellation circuit of linear frequency modulation continuous wave radar |
| CN114421894A (en) * | 2021-12-02 | 2022-04-29 | 北京时代民芯科技有限公司 | Broadband quadrature mixer |
| CN114421990A (en) * | 2021-12-29 | 2022-04-29 | 北京时代民芯科技有限公司 | Quadrature demodulator chip |
Non-Patent Citations (1)
| Title |
|---|
| MIMO雷达正交线性调频信号源系统的设计;崔永俊;杨卫鹏;刘阳;李康康;;仪表技术与传感器;20180715(07);第111-114页 * |
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| CN117728768A (en) | 2024-03-19 |
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