48 results about "Receiver front end" patented technology

The present disclosure provides a receiver front-end circuit including: first and second input units that alternately operate according to a common mode voltage of a differential input signal and output a differential output signal; a variable resistance unit that adjusts a differential load resistance supplied to the differential output signal according to the variable resistance control signal; and a control unit generating a variable resistance control signal according to a common mode voltage of the differential input signal. According to the receiver front-end circuit disclosed by the invention, the receiving of the differential input signal with a wider common-mode voltage range can be realized under low power supply voltage, and the output amplitude of the generated differential output signal does not change greatly along with the change of the common-mode voltage of the differential input signal; therefore, the compatibility of the receiver is improved, and the power consumption is reduced.

A beamforming front end (BFFE) for a receiver performs beamforming without needing to perform phase-shifting on each of a plurality of received signals. The BFFE comprises first variable gain amplifiers (VGAs) that respectively amplify the received signals by first gain values and second VGAs that respectively amplify the received signals by second gain values. Outputs of the first VGAs are combined into a first combined signal, and outputs of the second VGAs are combined into a second combined signal. The first and second combined signals are then used to produce an output signal corresponding to phase-shifting the received signals by amounts corresponding to the respective first and second gain values and then summing the results of the phase shifting. The output signal may be produced by mixing the first combined signal with an in-phase local oscillator signal and mixing the second combined signal with a quadrature local oscillator signal.

In at least one embodiment, a method for operating a receiver includes configuring a receiver front-end circuit of the receiver according to a selected power consumption configuration. The method includes adjusting a quiescent current of a programmable flat gain stage coupled to the receiver front-end circuit according to the selected power consumption configuration to compensate for any gain loss of the receiver front-end circuit in the selected power consumption configuration. The selected power consumption configuration may be a reduced power consumption configuration and the programmable flat gain stage may be configured to at least partially compensate for the gain loss of the receiver front-end circuit in the reduced power consumption configuration.

A packet energy transfer (PET) receiver comprising receiver front-end circuitry including an input, an output, and at least one switch connected at the output. There is receiver output control and conditioning circuity including an input and an output to be connected to an electrical load. There is a synchronizer circuit to close the switch to allow power to flow into the receiver output control and conditioning circuitry during each of the first plurality of transfer periods of the transmitter and to open the switch to prevent power to flow into the receiver output circuitry during a first plurality of sample periods. There is a load controller that disables the synchronizer circuit and operates the switch to close it and allow power to flow into the receiver output control and conditioning circuitry during subsequent transfer periods and to open the switch to prevent power to flow during a subsequent sample periods.

A low-noise amplifier (LNA) includes a first transistor, a second transistor, and a load coupled to a drain of the first transistor and a drain of the second transistor. The LNA also includes a first reactive impedance matching network including a first inductor and a second inductor inductively coupled with the first inductor, wherein the first inductor is coupled to a source of the first transistor, and the second inductor is coupled to a gate of the first transistor. The LNA also includes a second reactive impedance matching network including a third inductor and a fourth inductor inductively coupled with the third inductor, wherein the third inductor is coupled to a source of the second transistor, and the fourth inductor is coupled to a gate of the second transistor. The LNA also includes a switching circuit configured to enable or disable each of the reactive impedance matching networks.

The embodiment of the invention provides a satellite positioning receiver, a satellite positioning method and a storage medium, and relates to the technical field of satellite positioning navigation. The satellite positioning navigation receiver comprises an inertial sensing unit; a first processor and a second processor, the first processor is connected with the inertial sensing unit and the second processor, and the first processor is used for resolving the anti-interference satellite signal provided by the second processor and the receiver motion data provided by the inertial sensing unit to obtain a receiver pose; the receiver front end is used for receiving and processing the original satellite signal to obtain a preprocessed satellite signal; and the second processor is connected with the receiver front end and is used for carrying out anti-interference processing on the preprocessed satellite signal to obtain an anti-interference satellite signal. According to the receiver, resource competition of anti-interference processing, capture tracking and positioning calculation can be avoided, and due to the fact that the first processor and the second processor are arranged in a labor division mode, the receiver can process multiple satellite signals at the same time, and meanwhile positioning and navigation real-time performance is guaranteed.

One or more devices, systems, and / or methods are provided. In an example of the techniques presented herein, a receiver has a receiver front end configured to receive time domain data in natural order, a fast Fourier transform module configured to generate frequency domain data in digit reversed order based on the time domain data, a demodulator configured to generate first demodulated data in digit reversed order based on the frequency domain data, and a de-interleaver configured to perform a reordering permutation on the first demodulated data to generate second demodulated data in natural order.

In one aspect, a method comprises: comparing, in a comparator, a signal level of a receive radio frequency (RF) signal to a first threshold, the receive RF signal obtained from a controllable location in an RF front end circuit; and in response to the signal level of the receive RF signal exceeding the first threshold, causing the RF front end circuit to be reconfigured from a first mode in which an input to a low noise amplifier (LNA) is coupled an antenna to a second mode in which the input to the LNA is coupled to an RF filter.

Technologies for providing temperature compensation in an analog receiver front end (RX AFE) are described. A receiving device includes an RX AFE circuit with at least one load component and at least one load inductor structure with a closed ring. The RX AFE circuit is subject to fluctuations in circuit parameters over a temperature range, causing temperature drift in the receiving device. The closed ring reduces the temperature drift by generating an eddy current to reduce the effective inductance of the at least one load inductor structure. The eddy current depends on the equivalent series resistance (ESR) of the closed ring.

The present invention discloses an optical fiber ultrasonic detection device, comprising an optical signal generating component, a transmitting optical fiber, and a plurality of photoacoustic transducer transmitters connected in sequence, an echo detection component, a transmitting optical fiber, and a plurality of photoacoustic transducer receivers connected in sequence; a front-end substrate; the transmitting ports of each photoacoustic transducer transmitter and the receiving ports of each photoacoustic transducer receiver are distributed on the same surface of the front-end substrate; the optical signal generating component comprises a laser generating device and a phased array unit for generating an excitation light signal; the phased array unit is used to control the laser generating device to transmit the excitation light signal to each photoacoustic transducer transmitter according to a set rule. The present application sets a plurality of photoacoustic transducer transmitters and photoacoustic transducer receivers on the front-end substrate, and the front-end substrate can be attached to the surface of human tissue to achieve non-invasive detection of human tissue; improves the accuracy and reliability of the ultrasonic detection structure, and reduces the operational difficulty of ultrasonic detection, which is conducive to the widespread application of ultrasonic detection.

The application discloses a low-power-consumption mixing-priority type wideband receiver front-end module, which is based on a mixing-priority architecture, does not need to use an external matching network, realizes impedance matching from an antenna to a receiver front end, realizes high-Q band-pass filtering characteristics, and comprises a third harmonic mixer, a 12-stage ring voltage-controlled oscillator and a TIA transimpedance operational amplifier.The third harmonic mixer is connected with the 12-stage ring voltage-controlled oscillator and the TIA transimpedance operational amplifier.The 12-stage ring voltage-controlled oscillator provides a required local oscillator signal for the third harmonic mixer.The third harmonic mixer is used for down-converting an RF radio frequency signal into a zero intermediate frequency signal by using a third harmonic component of the local oscillator.The TIA transimpedance operational amplifier is used for effectively amplifying and filtering a zero intermediate frequency signal down-converted by the third harmonic mixer and then outputting the zero intermediate frequency signal.The application has lower power consumption than a conventional wideband receiver.

Disclosed herein is mesh relay module for relaying signals between nodes in a wireless mesh network. In one implementation, this mesh relay node may include a receiver front end comprising a receiver-side phased antenna array for receiving signals in one respective beam direction, a transmitter front end comprising a transmitter-side phased antenna array for transmitting signals in another respective beam direction, a communication interface, and circuitry that is configured to control the respective beam directions of the receiver and transmitter front ends and transfer signals between the receiver and transmitter front ends. Further, this mesh relay node may function to provide an indirect communication path between nodes within the wireless mesh network by (i) receiving signals from a first direction associated with a first node via the receiver front end and (ii) transmitting received signals in a second direction associated with a second node via the transmitter front end.

Methods and devices to support multiple frequency bands in radio frequency (RF) circuits are shown. The described methods and devices are based on adjusting the effective width of a transistor in such circuits by selectively disposing matching transistors in parallel with the transistor. The presented devices and methods can be used in RF circuits including low noise amplifiers (LNAs), RF receiver front-ends or any other RF circuits where input matching to wideband inputs is required.

An ultrasound system includes a transmit-receive switch. The transmit-receive switch includes a combined transmit-receive and return-to-zero (RTZ) path. The combined transmit-receive and RTZ path includes a transistor with a first current terminal, a second current terminal, and a control terminal. The second current terminal of the transistor is coupled to a ground node via a first switch and is coupled to a receive node via a second switch. The ultrasound system also includes a receiver front-end circuit coupled to the receive node.

A near-fuse ranging method based on fast warping Fourier transform, comprising the following steps: a single-chip radar in a near-fuse emits a triangular wave detection signal to a detection area, the signal is received by a receiving antenna of the single-chip radar after being reflected by the detection area, a radar echo digital signal is obtained by a pre-processing of a receiver front end of the single-chip radar, and the echo digital signal is sent to a signal processor; the echo digital signal is fitted by a WFFT fitting non-uniform filter group of the signal processor, and a modulus value of a processing result is taken to obtain a spectrum diagram of target energy accumulation with high resolution in a low frequency area and diffusion in a high frequency area; a detection threshold is set, a constant false alarm rate detection is performed on the spectrum diagram of target energy accumulation with high resolution in the low frequency area and diffusion in the high frequency area, and target frequency information is extracted; and distance information is calculated and transmitted to a fuse control system through a missile-borne computer. The present application improves the signal-to-noise ratio in the high frequency area and more accurately captures high frequency information.

A receiver front end amplifier capable of receiving and processing intraband non-contiguous carrier aggregate (CA) signals using multiple low noise amplifiers (LNAs) is disclosed herein. A cascode having a “common source” configured input FET and a “common gate” configured output FET can be turned on or off using the gate of the output FET. A first switch is provided that allows a connection to be either established or broken between the source terminal of the input FET of each LNA. Further switches used for switching degeneration inductors, gate capacitors, and gate to ground capacitors for each leg can be used to further improve the matching performance of the invention.

The invention relates to the technical field of avionics, in particular to a real-time digital monitoring data processing method and device for a dual-frequency modulation signal. Processing a monitoring composite signal of the instrument landing system received by the front end of the receiver to obtain an attenuation processing analog signal; according to an ADC analog-to-digital conversion circuit, performing digital signal conversion on the attenuation processing analog signal to obtain a digital domain sampling signal; performing two-stage DDC orthogonal digital down-conversion processing on the digital domain sampling signal to obtain a baseband signal, a 90Hz component and a 150Hz component; extracting and sampling the baseband signal, the 90Hz component and the 150Hz component to obtain a direct current component sequence, a 90Hz component sequence and a 150Hz component sequence after synchronous downsampling; according to the direct current component sequence, the 90Hz component sequence and the 150Hz component sequence, a modulation degree difference DDM and a modulation degree sum SDM are obtained, and updating of real-time digital monitoring data of the dual-frequency modulation signals is achieved. And the accuracy of signal acquisition and the reliability of subsequent processing are improved.

The present application belongs to the technical field of multi-channel microwave receiver, and particularly relates to a multi-channel dual-band microwave receiver front end. The radio frequency channel component is composed of two or more independent radio frequency channel modules; the local oscillator and calibration source component is connected with the radio frequency channel component to provide the local oscillator signal for high and low band up and down conversion; the power supply and control component provides the required power supply and control enable for each unit; the radio frequency channel module is used for receiving the high and low band signals of the antenna, obtaining the intermediate frequency signal by mixing with the local oscillator signal twice and outputting, and the reception and processing of each radio frequency signal and the final output of the intermediate frequency signal are independently realized in the same radio frequency channel module. The present application has the beneficial effects that: the channel is modularized and has strong anti-interference ability; the number of channels of the radio frequency channel component is adjustable, and the flexibility and scalability are better; two mixing methods are used for high and low bands, and the advantages of low cost, small size and low power consumption are achieved; the metal base is partially replaced by aluminum silicon, the product has high reliability, and is beneficial to wide application.

The invention provides a radio frequency receiver front end and a radio frequency receiver chip, and the radio frequency receiver front end comprises a broadband low-noise amplification module which converts a received single-end radio frequency voltage signal into a single-end radio frequency current signal, carries out the gain amplification operation, and carries out the gain regulation and control operation according to a received first gain regulation and control instruction; the frequency mixing module is used for performing orthogonal frequency conversion on the single-ended radio frequency current signal subjected to the gain amplification operation to generate a differential intermediate frequency current signal; the current simulation filtering module is used for converting the differential intermediate-frequency current signal into a differential intermediate-frequency voltage signal, carrying out high-order filtering and gain amplification operation, and completing bandwidth switching and bandwidth automatic calibration operation; and the automatic gain control module is used for carrying out signal amplitude judgment on the differential intermediate frequency voltage signal subjected to high-order filtering and gain amplification operation to generate a first gain regulation and control instruction. According to the invention, high gain and large bandwidth are compatible while small size is realized, so that the requirements of communication range and navigation positioning precision are met.

Methods and devices to minimize or reduce phase discontinuity between different gain modes (including bypass, active and passive modes) with reduced increase in circuit size (footprint or number of components) and complexity, without impacting other performance parameters, are disclosed. Phase shifter elements that can be disposed in both the active and passive bypass paths are also described. Moreover, devices using the same reconfigurable phase shifter elements in both active and bypass modes are described. Components of the phase shifters can also perform output matching when the phase shifters are implemented as part of an RF receiver front-end.

A sound velocity measuring instrument for physical experiments disclosed by the present invention comprises a measuring instrument host and a measurement placement base arranged at the left side of the measuring instrument host, a hollow support rod is arranged at the center of the top end of the measurement placement base, and a sound velocity measurement receiver is arranged at the top end of the hollow support rod. Receiving holes are densely distributed in the front end of the sound velocity measurement receiver, a stable position adjusting device is arranged at the bottom end of the measurement placement base, the novel stable position adjusting device is additionally arranged at the bottom end of the measurement placement base, and the position of the measurement placement base can be adjusted through the stable position adjusting device; in this way, the sound velocity measurement receiver can be driven to perform position adjustment synchronously, so that the sound velocity measurement receiver can be accurately adjusted to a position required by an experiment, and the situation that the sound velocity measurement receiver receives signals inaccurately due to the fact that the measurement placement base is placed at an improper position on an experiment platform is avoided. And the precision and the accuracy of sound velocity measurement are greatly improved.

The present disclosure provides a receiver front-end circuit, comprising: a first input unit and a second input unit, configured to operate alternately on the basis of a common-mode voltage of a differential input signal and to output a differential output signal; a variable resistor unit, configured to adjust, on the basis of a variable resistor control signal, a differential load resistance provided to the differential output signal; and a control unit, configured to generate the variable resistor control signal on the basis of the common-mode voltage of the differential input signal. According to the receiver front-end circuit of the present disclosure, a differential input signal having a wide common-mode voltage range can be received at a low power supply voltage, and the output amplitude of the generated differential output signal does not vary significantly with changes in the common-mode voltage of the differential input signal, thereby improving receiver compatibility and reducing power consumption.

A unique low power dual mode amplifier system for a receiver front end or transmitter is described. The invention is configured to utilize a common gain block element for amplification of both the RF-IF signal components found within a super heterodyne receiver. Replacement of separate gain stages for RF and IF components by a single common gain block offers a substantial power consumption reduction for a receiver or transmitter design. Implementation of the invention is possible using commonly found well known RF or IF circuitry elements. The invention combines several of the basic functions necessary to build a receiver or transmitter including frequency band selection, signal amplification and frequency conversion into a simple topology. An integrated circuit and discrete component type example implementations are provided.

The application relates to a novel dual-mode switching switch, which comprises two single-pole double-throw switches and is left-right mirror symmetrical, and can switch three-port mode and four-port mode, the three-port mode is one-input two-output (or two-input one-output), and the four-port mode is two-input two-output. The switch can be applied to a millimeter wave transmitter and receiver front end as a signal switching and mode switching module. Compared with a traditional switch, the switch has the advantages of balanced output signals in two different working modes, small insertion loss, high isolation, small area, high integration and the like.

The invention belongs to the technical field of multi-channel microwave receivers, and particularly relates to a front end of a multi-channel dual-band microwave receiver. The radio frequency channel assembly is composed of more than two independent radio frequency channel modules. The local oscillator and calibration source assembly is connected with the radio frequency channel assembly and provides high-low wave band up-down conversion local oscillator signals. The power supply and control assembly provides required power supply and control enabling for each unit; the radio frequency channel module is used for receiving high and low wave band signals of an antenna, performing frequency mixing twice with local oscillator signals to obtain intermediate frequency signals and outputting the intermediate frequency signals, and receiving processing of each path of radio frequency signals and final output of the intermediate frequency signals are independently realized in the same radio frequency channel module. The system has the beneficial effects that the channel is modularized, and the anti-interference capability is high; the number of channels of the radio frequency channel assembly is adjustable, and flexibility and expandability are better; high and low wavebands adopt two frequency mixing modes, so that the antenna has the advantages of low cost, small size and low power consumption; the metal substrate is partially replaced by aluminum and silicon, the product reliability is high, and wide application is facilitated.

One example includes a passive radar receiver system including an RF receiver front-end to receive a wireless source signal and a reflected signal. An antenna switch of the front-end switches a first antenna to a receiver chain during a first time to generate first radar signal data based on a combined wireless signal comprising wireless source signal and the reflected signal, and switches a second antenna to the receiver chain during a second time to generate second radar signal data based on the combined wireless signal. A signal processor generates source signal data associated with the wireless source signal based on the first and second radar signal data and generates reflected signal data associated with the reflected signal based on the first and second radar signal data, and generates target radar data associated with a target based on the source and reflected radar signal data.

The application discloses a low-noise amplifier structure adopting multi-inductive coupling and current multiplexing, comprising a multi-inductive coupling network and a full nmos current multiplexing technology network, wherein the multi-inductive coupling network and the full nmos current multiplexing technology network are connected, the full nmos current multiplexing technology network is used for making multi-stage amplifiers flow through the same current and making the multi-stage amplifiers share the same power voltage, and the multi-inductive coupling network is used for realizing wideband maximum power transmission matching and noise coefficient matching at an input node, so that high power transmission and low noise coefficient are realized. By using the application, wideband input matching and noise matching can be realized simultaneously. The application can be widely applied to the field of radio frequency receiver front ends.

The present disclosure provides a radio frequency (RF) receiver front-end comprising an RF integrated circuit chip with an antenna port terminal for coupling to an external antenna. The chip includes a low-noise amplifier coupled between an RF input terminal and an RF output terminal; an integrated built-in self-test system featuring resistors, a test switch, an oscillator generating a square-wave signal for testing, a buffer sharpening edges of the square-wave signal, and a controller performing self-tests to determine one or more characteristics of the RF receiver front-end. Additionally, an analog-to-digital converter converts test signals into digital form for analysis by the controller. An electronically controllable antenna switch is included to facilitate selective coupling between the antenna port and the RF input terminal during reception of RF signals or built-in self-testing. The system enables efficient testing and characterization of the RF receiver front-end directly on-chip, enhancing reliability in wireless communications devices.

Embodiments of the disclosure provide optical sensing systems, optical sensing methods, and integrated transmitter / receiver (TX / RX) modules. An exemplary optical sensing system includes an integrated TX / RX module and a controller coupled to the integrated TX / RX module. The integrated TX / RX module includes a laser emitter, one or more optics, and a receiver frontend. The laser emitter is configured to emit an optical signal toward the one or more optics. The one or more optics are configured to form the optical signal received from the laser emitter into a predefined shape and direct the optical signal having the predefined shape to an environment surrounding the optical sensing system. The receiver frontend is configured to receive a returned optical signal from the environment and convert the returned optical signal into an electrical signal. The laser emitter, the one or more optics, and the receiver frontend are assembled in a single package.

A low-noise amplifier (LNA) includes a first transistor (610), a second transistor (615), and a load (670). The LNA also includes a first reactive impedance matching network including a first inductor and a second inductor inductively coupled with the first inductor, wherein the first inductor is coupled to a source of the first transistor (610), and the second inductor is coupled to a gate of the first transistor (610). The LNA also includes a second reactive impedance matching network including a third inductor and a fourth inductor inductively coupled with the third inductor, wherein the third inductor is coupled to a source of the second transistor (615), and the fourth inductor is coupled to a gate of the second transistor (615). The LNA also includes a switching circuit (746) configured to enable or disable each of the reactive impedance matching networks.