241results about "Modulation transference balanced arrangements" patented technology

The invention discloses an equalization circuit and a continuous time linear equalizer. The equalization circuit comprises an input stage circuit, a feedback control circuit, a source degeneration circuit and a load circuit, the input stage circuit is in coupling connection with the feedback control circuit, when an input signal of the signal input end is low-frequency, the feedback control circuit is cut off, and the signal is amplified by the first transistor; when the frequency of the received signal is increased, the feedback control circuit is switched on, and the signal is amplified by the first transistor and the second transistor; when the input signal is high frequency, the source degeneration circuit generates a source degeneration effect related to the frequency; the load circuit is composed of a feedback loop and used for decoupling load parasitism and input stage circuit parasitism. The amplifier is also used for receiving control voltage and providing gain for the equalization circuit; the control voltage is used to regulate the gain effect provided by the load circuit. According to the invention, a multi-segment equalization function of the equalizer can be realized, and the equalizer is suitable for attenuation of different channels and compensates for attenuation of signals by different attenuation mechanisms.

The invention provides a frequency mixer and signal transmission equipment, and belongs to the technical field of communication. In the scheme provided by the invention, the mixer can transmit the local oscillator signal through the slot line, and transmit the first signal, the second signal and the third signal through the microstrip line. Therefore, it can be ensured that the transmission mode of the local oscillator signal is different from the transmission mode of the first signal and is different from the transmission modes of the second signal and the third signal, that is, the transmission mode isolation of the local oscillator signal from the first signal and the transmission mode isolation of the local oscillator signal from the second signal and the third signal can be realized. The transmission modes of the local oscillator signal and other signals are isolated, so that the leakage of the local oscillator signal at other signal ports can be effectively reduced, and the performance of the mixer is effectively improved.

A device for generating a qubit control signal includes: a first signal envelope generator circuit including a first multiple of signal sources, in which an output of each signal source of the first multiple of signal sources is combined to provide a first cumulative output; and a first mixer circuit coupled to the first signal envelope generator circuit, in which the first cumulative output is coupled to a first input of the first mixer circuit, and an output of the first mixer circuit includes a first qubit control signal.

A mixer includes a mixing stage, and a first transistor and a second transistor coupled to the mixing stage. A gate of the first transistor is coupled to a first input of the mixer, and a gate of the second transistor is coupled to a second input of the mixer. The mixer also includes a first source resistor coupled to a source of the first transistor, and a second source resistor coupled to a source of the second transistor. The mixer further includes an amplifier having a first input coupled to the source of the first transistor, and a second input coupled to the source of the second transistor. The amplifier is configured to adjust at least one bias voltage of at least one of the first transistor and the second transistor based on a differential voltage between the first and second inputs of the amplifier.

Mixer circuitry can include a first pair of transistors coupled to a first tail node and configured to receive a local oscillator signal, a second pair of transistors coupled to a second tail node and configured to receive the local oscillator signal, a first digital-to-analog converter, a second DAC coupled between the first DAC and of the first pair of transistors, and a third DAC coupled between the first DAC and the second pair of transistors. During a first phase, control circuitry can sweep the first DAC to trim a first and / or other odd order local oscillator feedthrough. During a second phase, the control circuitry can sweep the second DAC to trim a second and / or other even order local oscillator feedthrough. During a third phase, the control circuitry can sweep the second and third DACs to reject signals associated with a second harmonic conversion gain of the mixer circuitry.

The invention discloses a continuous time linear equalizer which comprises a transconductance circuit, a transimpedance amplifier circuit and a common-mode voltage feedback circuit. The transconductance circuit comprises a pair of PMOS (P-channel Metal Oxide Semiconductor) tubes, a pair of NMOS (N-channel Metal Oxide Semiconductor) tubes, six current sources and two RC (Resistance-Capacitance) networks; two branches are arranged between the power supply and the ground. A grid electrode of the first PMOS tube is connected with a grid electrode of the first NMOS tube, a grid electrode of the second PMOS tube is connected with a grid electrode of the second NMOS tube, and the first PMOS tube and the second PMOS tube respectively receive a pair of differential input voltages. The drain electrode of the first PMOS tube is connected with the drain electrode of the first NMOS tube, the drain electrode of the second PMOS tube is connected with the drain electrode of the second NMOS tube, and a pair of differential intermediate signals is output respectively. The circuit is simple in structure and only has a primary circuit; a complementary structure of PMOS input geminate transistors and NMOS input geminate transistors is adopted, bias current is utilized to the maximum extent, power consumption is low, and compared with a traditional circuit, the current utilization rate is improved; balancing of a wide frequency band can be realized under the condition of low power consumption, and the gain is high.

The invention relates to the technical field of wireless receivers, and discloses a low-noise amplifier and a radio frequency front-end circuit, the low-noise amplifier comprises a biasing circuit and an amplifying circuit, the low-noise amplifier converts an input single-ended radio frequency signal into differential output through an MOS tube NM2 and an MOS tube NM3, and large gain is provided; secondly, external impedance matching can be better realized through single-end input, and the anti-interference capability can be enhanced through differential output; the MOS tube NM0 and the MOS tube NM1 of the low-noise amplifier are connected in a cross coupling mode, differential current imbalance can be calibrated, and noise performance is improved. Finally, the structure of the low-noise amplifier enables the noise introduced by the MOS tube NM2 to become a common-mode signal, and the introduced noise is eliminated; the mixer circuit adopts a double-balanced active mixer, common-mode signals can be well suppressed by adopting differential pair input, a local oscillator input end and a radio frequency input end are well isolated, external interference is small, and the mixer adopts a folding structure, can work under low power supply voltage and effectively reduces power consumption.

This distributed double-balanced mixer includes unit cells (4a-1 to 4a-N), each of which outputs the following signals to transmission lines (CPW20pp, CPW20nn, CPW20np, CPW20pn) without synthesizing said signals: a signal (R++) obtained by synthesizing an in-phase LO signal (LO+) and an in-phase IF signal (IF+); a signal (RF--) obtained by synthesizing a reverse-phase LO signal (LO-) and a reverse-phase IF signal (IF-); a signal (RF-+) obtained by synthesizing the reverse-phase LO signal (LO-) and the in-phase IF signal (IF+); and a signal (RF+-) obtained by synthesizing the in-phase LO signal (LO+) and the reverse-phase IF signal (IF-).

An electronic device may include wireless circuitry having a radio-frequency mixer. The mixer may include a first pair of mixer transistors configured to receive an oscillating signal, a second pair of mixer transistors configured to receive the oscillating signal, and a bias circuit configured to receive the oscillating signal and to generate a corresponding output voltage for controlling an amount of current flowing through the first and second pairs of mixer transistors. The bias circuit can be configured as a replica envelope detection circuit. The bias circuit can include a pair of bias transistors coupled to a tail transistor that receives the output voltage of the replica envelope detection circuit.

The utility model discloses a miniaturized image rejection frequency mixing circuit, which comprises two passive double-balanced frequency mixers, a local oscillator bridge, a phase shift circuit and a power divider, the first input ends of the first passive double-balanced mixer and the second passive double-balanced mixer are connected with an external antenna; the second input end of the first passive double-balanced mixer is connected with the first output end of the local oscillator bridge, the second input end of the second passive double-balanced mixer is connected with the second output end of the local oscillator bridge, and the output end of the first passive double-balanced mixer is connected with the input end of the phase shift circuit. The output end of the second passive double-balanced mixer is connected with the second input end of the power divider; the isolation end of the local oscillator bridge is connected with the load resistor, and the input end of the local oscillator bridge is connected with the frequency source; the output end of the phase shift circuit is connected with the first input end of the power divider, and the output end of the power divider is connected with an external circuit. According to the utility model, the size of the image rejection mixer can be obviously reduced, and miniaturization design of a radar receiver is facilitated.

An electronic device may include wireless circuitry having a radio-frequency mixer. The mixer may include a first pair of mixer transistors configured to receive an oscillating signal, a second pair of mixer transistors configured to receive the oscillating signal, and a bias circuit configured to receive the oscillating signal and to generate a corresponding output voltage for controlling an amount of current flowing through the first and second pairs of mixer transistors. The bias circuit can be configured as a replica envelope detection circuit. The bias circuit can include a pair of bias transistors coupled to a tail transistor that receives the output voltage of the replica envelope detection circuit.

The invention provides a mixer correction circuit and a mixer, and relates to the technical field of integrated circuits, the mixer correction circuit comprises an intermediate frequency input stage, a local oscillator input stage and a load stage which are connected in sequence; the intermediate frequency input stage comprises a first input transconductance unit and a second input transconductance unit; the local oscillator input stage comprises a first local oscillator input unit and a second local oscillator input unit; transconductance transistors included in the first input transconductance unit and the second input transconductance unit are respectively provided with a current adjusting array. The current adjustment array is used for suppressing current deviation of the first input transconductance unit and the second input transconductance unit. According to the mixer correction circuit and the mixer provided by the invention, the current deviation is suppressed through the current adjustment array, the current balance of the transconductance transistor of the mixer can be realized, local oscillation signals are effectively prevented from leaking to an intermediate frequency end and a radio frequency end, and the use requirements of the mixer can be met under the condition that the performance of the mixer is not influenced.

The invention relates to a microwave and millimeter wave technology, in particular to an electrically tunable substrate integrated waveguide equalizer based on MESFETs and variable capacitance diodes, which comprises an SIW body, two ends of the SIW body are respectively provided with a 50-ohm microstrip line, and the 50-ohm microstrip lines are connected with the SIW body through gradual transition lines; a rectangular area formed by a groove type frame is arranged in the center of an SIW body, a plurality of electronic elements are arranged on the groove type frame of the rectangular area, MESFETs are introduced into the electronic elements, and variable microwave resistance is fitted by utilizing the characteristic that the MESFETs present different impedance characteristics between a drain and a source under different gate voltages. And the impedance value is adjusted by adjusting the direct-current grid voltage on the MESFETs. According to the invention, the balance value is dynamically and uniformly adjusted, and the adjustment range is widened.

Mixer circuitry can include a first pair of transistors coupled to a first tail node and configured to receive a local oscillator signal, a second pair of transistors coupled to a second tail node and configured to receive the local oscillator signal, a first digital-to-analog converter, a second DAC coupled between the first DAC and of the first pair of transistors, and a third DAC coupled between the first DAC and the second pair of transistors. During a first phase, control circuitry can sweep the first DAC to trim a first and / or other odd order local oscillator feedthrough. During a second phase, the control circuitry can sweep the second DAC to trim a second and / or other even order local oscillator feedthrough. During a third phase, the control circuitry can sweep the second and third DACs to reject signals associated with a second harmonic conversion gain of the mixer circuitry.

Mixer circuitry can include a first pair of transistors coupled to a first tail node and configured to receive a local oscillator signal, a second pair of transistors coupled to a second tail node and configured to receive the local oscillator signal, a first digital-to-analog converter, a second DAC coupled between the first DAC and of the first pair of transistors, and a third DAC coupled between the first DAC and the second pair of transistors. During a first phase, control circuitry can sweep the first DAC to trim a first and / or other odd order local oscillator feedthrough. During a second phase, the control circuitry can sweep the second DAC to trim a second and / or other even order local oscillator feedthrough. During a third phase, the control circuitry can sweep the second and third DACs to reject signals associated with a second harmonic conversion gain of the mixer circuitry.

The invention provides a frequency mixer. The frequency mixer comprises a double-balanced Gilbert frequency mixer, an interstage first coupling transformer, a variable gain buffer, an interstage second coupling transformer, an I / Q orthogonal passive frequency mixer and a TIA filter, the double-balance Gilbert mixer, the interstage first coupling transformer, the variable gain buffer, the interstage second coupling transformer, the I / Q orthogonal passive mixer and the TIA filter are electrically connected in sequence; the double-balanced Gilbert mixer is used for receiving the differential signal and mixing the differential signal with a local oscillator signal of the double-balanced Gilbert mixer to realize first down-conversion and output a difference frequency signal; the variable gain buffer is used for realizing amplification processing of different gains; the I / Q orthogonal passive mixer is used for mixing the I-path signal and the Q-path signal with a local oscillator signal to realize second down-conversion and output a difference frequency signal; the TIA filter is used for filtering an input difference frequency signal and then outputting an intermediate frequency signal. The mixer can realize adjustable gain, and has good linearity and noise performance.

The invention discloses a terahertz broadband on-off keying modulator with stable input impedance. According to the invention, a parallel common-base common-emitter bottom differential pair is adopted, and when the parallel common-base common-emitter bottom differential pair works in a differential mode state, a signal path formed by transistors Q6, Q5, Q7 and Q8 forms an amplification path, so that high current gain is ensured; when working in a common-mode state, signals from the common emitter transistor pairs Q5 and Q8 and signals from the common base transistor pairs Q6 and Q7 are offset, so that common-mode leakage signals are inhibited, and the'on-off 'isolation degree is further improved. The working frequency band is regulated and controlled by regulating and controlling the direct-current bias and the size of the common-base transistor to the Q6 and the Q7. According to the invention, a parallel common-base common-emitter differential pair is adopted as a double-balance differential structure OOK modulator of a bottom tail tube, so that low on / off input impedance change is realized while ultra-wideband input matching and high switch isolation are realized.

Certain aspects provide a circuit for frequency translation. The circuit includes first mixer circuitry coupled to a load circuit and having a first mixer configured to generate, based on a first differential input signal and a second differential input signal, a first portion of a frequency translated differential signal to be provided to the load circuit, and a second mixer configured to generate, based on a third differential input signal and a fourth differential input signal, a second portion of the frequency translated differential signal. The circuit also includes second mixer circuitry coupled to another load circuit and having a third mixer configured to generate, based on the first differential input signal and the fourth differential input signal, a first portion of another frequency translated differential signal, and a fourth mixer configured to generate, based on the third differential input signal and the second differential input signal, a second portion of the another frequency translated differential signal.

This invention relates to a ground-based analog frequency conversion system for satellite payloads and its implementation method. The system includes: a filtering and coupling module for receiving high-frequency signals in the Q and V bands and splitting them into a coupling signal and a main signal, which are then transmitted to a detector module and a limiter, respectively. The detector module detects the power of the coupling signal at different temperatures and feeds it back to the control module. The limiter limits the maximum strength of the main signal to protect the low-noise amplifier (LNO). The LNO amplifies the main signal and reduces noise. A phase-locked loop (PLL) and frequency conversion module down-converts the high-frequency signal to an intermediate-frequency (IF) signal. An IF filtering and amplification module suppresses spurious interference and amplifies the IF signal. A temperature compensation module and a gain control module adjust the attenuation value to achieve temperature compensation and ensure that the IF output signal strength meets preset requirements. All modules are integrated using micro-assembly technology. This system can reduce the power consumption and cost of satellite launch and communication.

A device for generating a qubit control signal comprises: a first signal envelope generator circuit comprising a first plurality of signal sources, wherein an output of each of the first plurality of signal sources is combined to provide a first cumulative output; and a first mixer circuit coupled to the first signal envelope generator circuit, wherein the first cumulative output is coupled to a first input of the first mixer circuit, and an output of the first mixer circuit comprises a first qubit control signal.

The embodiment of the invention discloses an IQ mixer, a quantum measurement and control system and quantum computing equipment, and is applied to the technical field of frequency mixing. In the embodiment of the invention, the in-phase port and the quadrature phase port are arranged on one of the two opposite side surfaces of the cavity of the IQ mixer, and the local oscillation port and the radio frequency port are arranged on the other side surface, so that when the IQ mixer is applied to the signal transmission module of the quantum measurement and control system, the signal transmission efficiency is improved; according to the invention, extrusion of ports between side surfaces of adjacent IQ mixers can be avoided, and a plurality of IQ mixers can be compactly arranged on a signal transmission module of a quantum measurement and control system.

This disclosure provides systems, methods, and devices for wireless communication that support reconfiguring degeneration components in a converged RF transceiver supporting carrier aggregation across sub-6 GHz frequency bands and mmWave frequency bands. In a first aspect, an apparatus includes an input port configured to receive a mixer input signal; a first mixer forming at least a portion of an HRM mixer and coupled to the input port; a first configurable degeneration component of a first processing path coupled between the input port and the first mixer; and a controller coupled to the first degeneration component, wherein the controller is configured to control a first aspect of a first degeneration component. Other aspects and features are also claimed and described.

An apparatus comprising a local oscillator (LO) for driving a mixer, the LO being configured to oscillate at an oscillation frequency, and generate a first set of LO signals, wherein each of the first set of LO signals has a LO signal frequency equal to a first multiplication factor m multiplied by the oscillation frequency, the first multiplication factor m, being an integer greater than or equal to two, and each of the first set of LO signals is separated by adjacent LO signals by a phase difference equal to 360° divided by a first variable n, the first variable n being an integer that is greater than or equal to two.

The present disclosure relates to a subharmonic mixer including first and second radio frequency (RF) inputs, local oscillator inputs configured and arranged to receive at least a first, second, third, and fourth local oscillator signals having respective first, second, third, and fourth phases and each having a first frequency, first, second, third, and fourth outputs, a first capacitor coupled between the first RF input and a first node, a first switch coupled between the first node and the second RF input and including a first control terminal to receive the first local oscillator signal, a second switch coupled between the first node and the first output and including a second control terminal to receive the fourth local oscillator signal, and a third switch coupled between the first node and the third output and including a third control terminal to receive the second local oscillator signal.

A passive mixer circuit includes a high-frequency terminal, a low-frequency terminal, a main MOSFET to which a local oscillation frequency signal is input, and a bias generation section, in which the bias generation section includes a sub-MOSFET of a same type as the main MOSFET, a voltage follower circuit including an operational amplifier, and a resistance element, a drain and a gate of the sub-MOSFET are shorted and directly or indirectly receive an output from the voltage follower circuit, a reference voltage is input to a non-inverting input terminal of the operational amplifier, a gate bias voltage based on a gate voltage of the sub-MOSFET is supplied to a gate of the main MOSFET, and a source-drain bias voltage based on a source voltage of the sub-MOSFET is supplied to a source or a drain of the main MOSFET.

Circuitry (24) is provided that includes a matching circuit (100), a first mixer (50-1) coupled to the matching circuit and configured to receive a signal with an oscillation frequency, a second mixer (50-2) coupled to the matching circuit, a first transmission line path (102-1) coupled between the matching circuit (100) and an input of the first mixer (50-1), and one or more capacitors (104) coupled to the input of the first mixer (50-1) and configured to reject signals at a harmonic frequency of the oscillation frequency. The wireless circuitry (24) can further include a second transmission line path (102-2) coupled between the matching circuit (100) and an input of the second mixer (50-2). The transmission line path can include a first transmission line for conveying signals between the matching circuit (100) and the first mixer (50-1), a second transmission line for conveying signals between the matching circuit (100) and the first mixer (50-1), and a floating transmission line interposed between the first and second transmission lines.

The invention discloses a blood flow signal processing method and device based on silicon-based photons and wearable device.The method comprises the steps that firstly, phase modulation is conducted on three emitted narrow-band lasers with different wavelengths, the modulation frequency is set to be 50-100 MHz, and the generated sideband frequency is set to be 50-100 MHz; receiving a reflection signal passing through a human body artery blood vessel target area, demodulating the reflection signal and a local oscillator signal in a frequency mixer, and extracting a PDH error signal; finally, the blood flow direction in the target area is judged according to the positive and negative values. According to the hemodynamic monitoring system based on the optical resonant cavity array and the PDH read-out technology, through the innovation of a physical mechanism (strength detection is replaced by frequency detection), the innovation of a spatial architecture (an array replaces a single point) and the breakthrough of an algorithm model (physical field decoupling and waveform separation), the detection accuracy is improved; the problems that a traditional non-invasive blood pressure monitoring technology is low in precision, poor in interference resistance and lack of deep pathological information are fundamentally solved.

The invention discloses a silicon-based terahertz quintuple frequency multiplier based on a semi-closed coupling structure, comprising an input balun, a fourth harmonic frequency multiplication unit, an interstage transformer, a single-balanced mixer unit and an output balun. A single-ended fundamental wave signal is converted into a differential signal by the input balun and injected into the frequency multiplication unit. At the same time, a differential signal is split from the differential port of the input balun as the local oscillator of the mixer unit. The frequency multiplication unit generates a fourth harmonic and injects it into the source end of the mixer unit in a single-ended mode as an intermediate frequency signal. The mixer unit mixes the fundamental wave and the fourth harmonic to generate a five-fold frequency differential signal, and the output balun converts the differential signal into a single-ended output. Both the input balun and the output balun adopt a semi-closed coupling structure to reduce the coupling loss of passive devices. The structure has the characteristics of strong coupling and high design freedom, solves the problem of large loss of the passive coupling structure of the silicon-based millimeter-wave terahertz circuit, and improves the output power of the terahertz frequency multiplier.

The embodiment of the invention provides an orthogonal signal generation circuit and electronic equipment. The orthogonal signal generation circuit comprises a single-slip module, an orthogonal frequency division module and an output module, the four-path orthogonal signal conversion module is used for converting an input first signal and outputting the converted signal into four-path target orthogonal signals. According to the orthogonal signal generation circuit provided by the embodiment of the invention, high-consistency ultra-wideband orthogonal signal output can be realized, and a high-quality local oscillator signal can be provided for an orthogonal frequency conversion transceiver; the transceiver can utilize the local oscillator signal to suppress interference of the mirror image signal and stray of signal radiation. The circuit also can directly generate four paths of orthogonal signals with preset duty ratios, reduces the image current of the mixer, has enough driving capability, and can provide enough grid turn-on voltage for the mixer. The orthogonal signal generation circuit also has the advantages of small area, low power consumption and the like, and solves the problems of the orthogonal signal generation circuit in the related technology.

The utility model discloses a miniaturized high-reliability equalizer, which is based on a GaAs IPD process and comprises an equivalent capacitor C1, one end of the equivalent capacitor C1 is used as an input end of the equalizer, and the other end of the equivalent capacitor C1 is used as an output end of the equalizer; one end of the equivalent capacitor C1 is also connected with one end of the equivalent resistor R1, the other end of the equivalent capacitor C1 is also connected with one end of the equivalent resistor R2, the other end of the equivalent resistor R1 is respectively connected with the other end of the equivalent resistor R2 and the grounding equivalent resistor R3, the resistors, the capacitors and the inductors are improved to form an equalization network, and the overall performance of the equalizer is improved.