65results about "Active element network" patented technology

The invention relates to a full duplex digital isolator. A circuit is provided. The circuit comprises: a first transmitter circuit having a first input terminal arranged to receive first input data and a first node arranged to transmit first intermediate data corresponding to the first input data; a first receiver circuit including a second node arranged to receive the first intermediate data and a first output terminal arranged to generate first output data corresponding to the first input data; comprising a second input terminal and said second node, the second input terminal arranged to receive second input data, the second node further arranged to transmit second intermediate data corresponding to the second input data; and a second receiver circuit comprising a first node and a second output terminal, the first node being further arranged to receive the second intermediate data, and the second output terminal being arranged to generate second output data corresponding to the second input data.

The present disclosure relates to a capacitance multiplier for decoupling capacitors. An integrated circuit can include one or more circuits coupled to a capacitance multiplier circuit. The capacitance multiplier circuit can include a capacitor, fixed and tunable resistors, and a transconductance circuit. The tunable resistor can be adjusted to control the total capacitance of the capacitance multiplier circuit. The transconductance circuit can include a transistor having a drain terminal coupled to a first electrical component and a source terminal coupled to a second electrical component. The first electrical component can be a diode-connected transistor, a direct shorted wire, a resistor, an inductor, or a current source. The second electrical component can be a current source, a direct shorted wire, a resistor, an inductor, or another diode-connected device. Configured in this way, the capacitance multiplier circuit can provide a large adjustable capacitance without voltage drop and without consuming a large amount of power.

A radio-frequency module includes a first switch, a first filter, second filters, a power amplifier, and a low-noise amplifier. The first switch has a first terminal, a second terminal, and a third terminal. The first terminal is coupled to an antenna terminal. The first filter is coupled to the second terminal. The second filters are coupled to the third terminal. The first filter includes a common filter circuit and an additional filter circuit. The additional filter circuit is coupled between the power amplifier and the common filter circuit. The low-noise amplifier is coupled to a path that branches off from a path connecting between the common filter circuit and the additional filter circuit. The common filter circuit is coupled between the additional filter circuit and the first switch.

Aspects of this disclosure relate to a parallel hybrid acoustic passive filter. The parallel hybrid acoustic passive filter includes a first sub-filter and a second sub-filter. The first sub-filter includes a first acoustic resonator and a first non-acoustic passive component. The second sub-filter includes a second acoustic resonator and second first non-acoustic passive component. The first sub-filter and the second sub-filter are together arranged to filter a radio frequency signal. The parallel hybrid acoustic filter can be a band pass filter or a band stop filter, for example. Related multiplexers, wireless communication devices, and methods are disclosed.

Aspects of this disclosure relate to hybrid acoustic LC filter with harmonic suppression. The hybrid acoustic LC filter includes a hybrid passive / acoustic and a non-acoustic LC filter cascaded with the hybrid passive / acoustic filter. The hybrid passive / acoustic filter can be configured to filter a radio frequency signal. The hybrid passive / acoustic filter can include acoustic resonators and a non-acoustic passive component. The non-acoustic LC filter can be configured to suppress a harmonic of the radio frequency signal. The non-acoustic LC filter can be a low pass filter or a harmonic notch filter, for example. Related multiplexers, wireless communication devices, and methods are disclosed.

Aspects of this disclosure relate to a multiplexer with a hybrid acoustic passive filter. The multiplexer includes a plurality of filters configured to filter respective radio frequency signals, a shared filter coupled between each of the plurality of filters and a common node, and a radio frequency filter coupled to the common node. At least a first filter of the plurality of filters includes acoustic resonators and a non-acoustic passive component. Related multiplexers, wireless communication devices, and methods are disclosed.

The utility model relates to the technical field of radio frequency microwave communication, and discloses a radio frequency microwave power synthesis device, which comprises an external power supply, an EMC (Electro Magnetic Compatibility) protection module and a power supply management module, the power management module is electrically connected with a signal preprocessing module, a power amplification module, an input coupling and detection module, a frequency selection switch matrix module, a reconfigurable filter network module, a dynamic power adjustment module, a phase matching module, a power synthesis module, an output coupling and detection module and an intelligent control module. According to the utility model, through cooperation of the dynamic power adjustment module, the phase matching module, the power amplification module and the power synthesis module, the power synthesis efficiency of the radio frequency microwave power synthesis device is improved, the power consumption is reduced, and the signal distortion is reduced; and high-efficiency power synthesis in a wide frequency band is realized.

A coupling module can be used to communicate high speed signals between an optical transceiver and a processing module of an optical communication device, such as an optical line termination (OLT) or an optical network unit (ONU). The coupling module can adjust the common mode voltage level of a differential signal output by the optical transceiver to the common mode voltage level required by the processing module. In addition, the coupling module splits each of the differential output signals from the optical transceiver and passes the split signals to both a high-pass filter and a low-pass filter that are connected in parallel. The outputs of the high-pass filter and the low-pass filter from different paths of the differential signal are cross-coupled and combined to provide a differential signal to the processing module.

A noise filtering circuit, a digital to analog converter and an electronic device are provided. The noise filtering circuit comprises a first amplifier configured to receive a bias voltage at a first input terminal, receive a bias output voltage at a second input terminal though a feedback path, and compensate for a difference between the bias voltage and the bias output voltage; a first transistor connected to an output of the first amplifier and having a gate to which an off-voltage is applied; a first capacitor connected to the first transistor; a second capacitor connected to the output of the first amplifier; a second transistor connected to the second capacitor and having a gate to which an off-voltage is applied, and a second amplifier having an input terminal connected to the first capacitor and a second input terminal connected to the second transistor.

The invention relates to a multiplexer circuit for a battery management system and a corresponding battery management system. A MUX for a battery management system includes first, second, and third input terminals for coupling to first, second, and third, respectively, of a stack. The first, second, and third switches have respective first, second, and third terminals coupled to first, second, and third input terminals, respectively, of the MUX. The AFE and selection circuit includes first, second and third input terminals coupled to second terminals of the first, second and third switches, respectively, first and third output terminals for coupling to positive inputs of the first and second level shifter circuits, and second and fourth output terminals for coupling to negative inputs of the first and second level shifter circuits, respectively. Each of the first, second, third, and fourth output terminals of the AFE and selection circuit is selectively coupleable to any of the first, second, and third input terminals of the AFE and selection circuit.

A circuit. The circuit includes a first transmitter circuit having a first input terminal arranged to receive a first input data and a first node arranged to transmit a first intermediate data corresponding to the first input data, a first receiver circuit including a second node arranged to receive the first intermediate data and a first output terminal arranged to produce a first output data corresponding to the first input data, a second transmitter circuit including a second input terminal arranged to receive a second input data and the second node that is further arranged to transmit a second intermediate data corresponding to the second input data; and a second receiver circuit including the first node and a second output terminal, the first node further arranged to receive the second intermediate data, and the second output terminal arranged to produce a second output data corresponding to the second input data.

Disclosed is a calibration circuit, a calibration method for a filter and a filter device. The calibration circuit includes: a signal receiving terminal, receiving an output signal from the filter; a frequency detection module, obtaining a count value according to the output signal, the count value representing a frequency of the output signal; an adjustment module, adjusting the control signal according to the count value and a target value representing a target frequency, to adjust the frequency of the output signal provided by the filter until a calibration value, which allows the count value to be consistent with the target value, of the control signal is determined. The filter performs filtering according to the control signal with the calibration value in an operating stage. The calibration circuit performs feedback adjustment on the filter to achieve bandwidth calibration with high calibration accuracy and simple circuit structure.

Participant station (10; 30; 50; 60) for a bus system (1; 2), with a transmitting / receiving device (13) for transmitting a signal via the bus system (1; 2) to another subscriber station and for receiving a signal via the bus system (1; 2), in which at least temporarily exclusive, collision-free access of a subscriber station (10, 20, 30, 50, 60) to a bus line (40) of the bus system (1; 2) is ensured, and a modification device (12; 14) for modifying the transmission characteristics of a transmit path (131) of the transmit / receive device (13) and / or the receiving characteristics of a receive path (132) of the transmit / receive device (13), wherein the modification device (14) comprises a transmitter output stage (150) for pre-distortion of the signal to be transmitted by the transmit / receive device (13) in order to prevent the bus level from settling on a transmit channel within one clock cycle (T S) of the signal to be sent, and / or wherein the modification device (12) is a receiver modification device for changing the detection time (TD) to the right in the eye diagram and the decision threshold (E) upwards in the eye diagram, wherein the transmitter output stage (150) for pre-distortion of the signal to be transmitted by the transmit / receive device (13) is designed such that it adapts the transmitter characteristics of the subscriber station (50; 60) depending on the section of a frame of the bus system (2).

To provide a phase characteristics measuring instrument and the like that uses a voltmeter and a wave detector not requiring a high-speed trigger operation to avoid increase in the scale of an apparatus used for phase measurement, and thereby can achieve phase measurement at a relatively low price.SOLUTION: A phase characteristics measuring instrument comprises: a first wave detector 11 that receives and detects two patterns of three-tone signals, a first three-tone signal obtained by combining the three waves of angular frequencies ω1,ω2,ω3 (wherein ω2-ω1=ω3-ω2=Δω) and a second three-tone signal obtained by changing the phase of one tone of the first three-tone signal; a BPF 12 that allows only a beat component of an angular frequency difference Δω of adjacent waves of the three-tone signal from the signal output from the first wave detector to pass therethrough; a second wave detector 13 that detects power of the beat component that has passed through the BPF 12; a voltmeter 14 that measures the voltage of the signal output from the second wave detector; and a phase calculator 15 that calculates the phase on the basis of the measured voltage value.SELECTED DRAWING: Figure 2

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system further includes at least one switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch.

A resistor-capacitor (RC) sensor circuit of an electronic device drives a representative copy of a current driving an electronic circuit line of the electronic device to a drive voltage. The RC sensor circuit is to sample a voltage indicative of an RC time constant of the electronic circuit line. A first sample voltage is determined by sampling a first representative voltage generated at the RC sensor circuit by driving the RC sensor circuit with the representative copy of the current for a first period of time. A second sample voltage is determined by sampling a second representative voltage generated at the RC sensor circuit by driving the RC sensor circuit with the representative copy of the current for a second period of time. A ratio of the first sample voltage to the second sample voltage is indicative of the RC time constant of the electronic circuit line.

Antenna combiner (200), comprising: a housing (3); a plurality of input terminals (4) mounted on the housing (3), each of the plurality of input terminals (4) being adapted to receive an input signal; an output terminal (5) attached to the housing (3); and a signal combination circuit module (6) arranged in the housing (3) and comprising a plurality of input circuit units (61) each electrically connected to the plurality of input terminals (4), and a combination circuit unit (62) electrically connected between the plurality of input circuit units (61) and the output terminal (5), wherein each of the plurality of input circuit units (61) comprises an amplifier circuit (611) adapted to amplify the input signal received from the corresponding one of the plurality of input terminals (4) into a processed signal, and a circulator circuit (612) configured to transmit the processed signal to the combination circuit unit (62) and to isolate a returned signal from the combination circuit unit (62), wherein the combination circuit unit (62) is configured to combine the respective processed signals from the plurality of input circuit units (61) into an output signal and to output the output signal through the output terminal (5).

An error amplifier for a pulse width modulation circuit is described. The amplifier includes an operational amplifier configured as an integrator and a feedback loop coupled between a signal output of the operational amplifier and an inverting input of the operational amplifier. The feedback loop comprises a feedback capacitor coupled to the signal output, a feedback resistor coupled to the feedback capacitor, and an integrator resistor coupled to the feedback resistor and the inverting input of the operational amplifier. A junction between the feedback resistor and the integrator resistor is configured to receive an input signal and a junction between the feedback capacitor and the feedback resistor is configured to receive a feedback signal from the pulse width modulation circuit.

A filter device includes a multilayer body including dielectric layers, and an LC resonator including an inductor and a capacitor to transmit a signal from an input terminal to an output terminal. The LC resonator includes plate electrodes on dielectric layers different from each other and connected by a via. The plate electrodes define and function as the inductor. The plate electrodes overlap at least partially in a direction of lamination of the multilayer body. Each of the plate electrodes includes an extending portion extending in an x axis direction, and an extending portion extending in a y axis direction. An area of the extending portion of one plate electrode is smaller than an area of the other extending portion.

The present invention provides an analog AI computing architecture, and relates to the technical field of circuit design. The architecture includes: a signal obtaining module, configured to sample an analog signal to obtain signal sample data; a filtering module, configured to perform bandpass filtering on the signal sample data by an AI signal transmission mechanism to obtain filtered data; and a computing module, configured to compute the filtered data by an arithmetic unit and an external control switch to obtain a processed analog signal. The present invention simplifies the processing flow of traditional digital signals, improves the computing speed, and reduces the power consumption and system complexity required for computing.

The invention relates to a method and a system for automatically detecting the frequency of a radio-frequency signal. The method comprises the following steps: dividing an input radio-frequency signal into a radio-frequency detection signal and a radio-frequency main signal through a first coupler; a radio frequency detection signal is converted into a voltage value through a detector, a first comparator judges whether signal power exists or not, and output high and low levels are used for transmitting and receiving control; a radio frequency main signal is divided to a transmitting path and a receiving path through a first switch, the radio frequency main signal is divided into different frequency band signals through a duplexer in the transmitting path, and a second coupler and a second comparator are used for judging whether signal output exists in a corresponding frequency band so as to realize frequency control; after being amplified, an output signal of the duplexer is divided to a corresponding frequency band by a third switch to be filtered, and finally, the signal is transmitted to an antenna through transceiving control and frequency control. The frequency band is automatically identified through the frequency of the double-band-pass filter of the duplexer, coupling detection is carried out, and the detected voltage controls the switching of the switch filter; and transmitting or receiving of an automatic identification signal is realized by detecting the amplitude of an input radio frequency signal.

The present application relates to a kind of automatic detection method and system of radio frequency signal frequency, input radio frequency signal is divided into radio frequency detection signal and radio frequency main signal by first coupler;Radio frequency detection signal is converted into voltage value by detector, whether signal power is judged by first comparator, and the high-low level for output is used for transceiver control;Radio frequency main signal is divided into transmission and reception path by first switch, in transmission path, it is divided into different frequency band signals by diplexer, whether corresponding frequency band has signal output is judged by second coupler and second comparator to realize frequency control;The signal of diplexer output is amplified, and by third switch, it is divided into corresponding frequency band and is filtered, finally, signal is transmitted to antenna by transceiver control and frequency control.The frequency of the double band-pass filter of diplexer is automatically identified frequency band, and coupling detection is carried out, and the voltage after detection controls the switching of switch filter;The amplitude detection of input radio frequency signal is realized to automatically identify the transmission or reception of signal.

A differential amplifier comprises a first differential circuitry structure including a first part comprising at least one branch of transistors and a second part comprising at least one branch of transistors, and a second circuitry structure. The second circuitry structure has a first non-linear device and a second non-linear device. The non-linear devices each comprise a transistor having a control node connected to a differential output terminals of the differential amplifier. A common centre node of the non-linear devices is connected to a control node of one of the transistors of each branch of the first part having a differential output terminal. Amplifier applications, communication devices and network nodes are also disclosed.

A MUX (72) for a battery management system (10') includes a first input terminal for coupling to a first pin (Ci) of a battery stack (B), a second input terminal for coupling to a second pin (Ci-1) of the battery stack (B), and a third input terminal for coupling to a third pin (Ci-2) of the battery stack (B). A first switch (SWi) has a respective first terminal (100i) coupled to the first input terminal of the MUX, a second switch (SWi-1) has a respective first terminal (100i-1) coupled to the second input terminal of the MUX, and a third switch (SWi-2) has a respective first terminal (100i-2) coupled to the third input terminal of the MUX. An AFE and selection circuit (724) includes a first input terminal coupled to a second terminal (102i) of the first switch (SWi), a second input terminal coupled to a second terminal (102i-1) of the second switch (SWi-1), a third input terminal coupled to a second terminal (102i-2) of the third switch (SWi-2), a first output terminal for coupling to a positive input of a first level shifter circuit (16i), a second output terminal for coupling to a negative input of the first level shifter circuit (16i), a third output terminal for coupling to a positive input of a second level shifter circuit (16i-1), and a fourth output terminal for coupling to a negative input of the second level shifter circuit (16i-1). Each of the first, second, third and fourth output terminals of the AFE and selection circuit (724) is selectively couplable to any of the first, second and third input terminals of the AFE and selection circuit (724).

According to an embodiment, a method for determining a current of a motor or a generator is provided, comprising the steps of: obtaining a characteristic of a filter that filters noise generated in determining the current of the motor or the generator; determining a time delay generated by the filter based on a phase change of the characteristic of the filter that is determined by a change of an operating frequency of the motor or the generator; and determining the current of the motor or the generator by compensating for the time delay.

The invention provides a method for realizing power synthesis through multi-stage 90-degree bridge phase superposition, which comprises the following steps of: cascading 90-degree couplers and adding N identical amplifiers to form a power synthesis module, and bonding the N amplifiers with the 90-degree couplers through microstrip lines and gold wires with equal electrical lengths, and the power synthesis module performs N-time power synthesis by utilizing four-port device matching reciprocal transmission, N is 2n, and n is a positive integer. According to the invention, theoretical lossless transmission is realized by using the characteristic of matching reciprocal transmission of the four-port device; expansibility is achieved, and higher power can be formed through multiple times of accumulation based on a currently used coupling power method; the plane structure has the characteristic of adapting to various structures and is suitable for industrial large-scale production.

The application discloses a frequency synthesizer module, and relates to the technical field of radio frequency frequency synthesis, which comprises a control board, a fixed local oscillator board, a frequency hopping local oscillator board and a power division clock board. The control board comprises a programmable logic device, a serial interface circuit and a voltage conversion circuit. The programmable logic device is connected with the first phase-locked synthesizer and the second phase-locked synthesizer through the serial interface circuit. The voltage conversion circuit is connected with the fixed local oscillator board, the frequency hopping local oscillator board and the power division clock board. The power division clock board comprises a phase-locked crystal oscillator circuit and a clock power division network. The output end of the phase-locked crystal oscillator circuit is connected with the input end of the clock power division network. The first output end of the clock power division network is connected with the reference input end of the first phase-locked synthesizer. The second output end of the clock power division network is connected with the reference input end of the second phase-locked synthesizer. At least one output end of the clock power division network is used as the clock output end of the frequency synthesizer module. The frequency synthesizer module can accurately control the output power, suppress the stray and improve the spectral purity, thereby ensuring excellent phase noise performance and controllable frequency hopping time.

The utility model discloses an S-band and C-band broadband high-power synthesis device, which comprises a front-stage power distribution module, at least two amplification modules and a rear-stage power synthesis module, the pre-stage output end is connected with the input ends of the amplification modules, and the output ends of the amplification modules are connected to the post-stage input end in tandem; the amplification module comprises an input T-junction micro-strip power divider, a 90-degree hybrid bridge, a gallium nitride power amplification chip, a matched load and an output T-junction micro-strip power divider, isolation ports of the 90-degree hybrid bridge are connected with the matched load, each stage of power divider is integrated with a quarter-wavelength impedance conversion node, and radio frequency and power supply circuits in the amplification module are arranged in a stacked manner; according to the device, ultra-wideband high-efficiency power synthesis is realized through impedance matching and unbalanced energy directional absorption, and the device has the advantages of thermal management optimization, phase consistency guarantee, modular expandability and maintainability.

To provide a parallel hybrid elastic passive filter, a multiplexer, a wireless communication device, and a method.SOLUTION: A parallel hybrid elastic passive filter 130 includes a first sub-filter 132 and a second sub-filter 134. The first sub-filter 132 is a band-pass filter including a first elastic resonator and a first inelastic passive component, and the second sub-filter 134 is a band-pass filter including a second elastic resonator and a second inelastic passive component. The first sub-filter 132 and the second sub-filter 134 are arranged together to filter radio frequency signals. The parallel hybrid elastic filter 130 may be, for example, a band-pass filter 135 or a band-stop filter.SELECTED DRAWING: Figure 13

An audio signal converter device includes a variable gain amplifier circuit, a loop filter circuit, a quantizer circuit, and a digital-to-analog converter circuit. The variable gain amplifier circuit amplifies an audio signal to generate multiple first signals. The loop filter circuit generates multiple second signals according to the first signals. The quantizer circuit generates a digital output according to the second signals. The digital-to-analog converter circuit adjusts the first signals according to the digital output. A corresponding circuit in the variable gain amplifier circuit or the loop filter circuit includes an amplifier, which includes an input pair circuit and a load circuit The input pair circuit includes multiple input terminals and output terminals. The load circuit includes multiple transistors and a chopper circuit. The chopper circuit is coupled to the output terminals via the transistors and performs a noise modulation according to a clock signal.