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WO/1981/001779A1 |
An elliptic state variable filter (10) uses switched capacitors controlled by an arrangement of switches that provides or a frequency response independent of stray capacitors in the circuit. The filter section comprises three integrating...
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WO/1981/001778A1 |
Switched-capacitor circuit (50) for passing an audio frequency over a predetermined range of frequencies fabricated on a monolithic semiconductor substrate. The switched-capacitor filter (50) includes a first amplifier (60) and a second ...
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WO/1980/000644A1 |
The filter is comprised of at least a switch such as a voltage reversing switch, so that after actuating the switch the voltage across the terminals of the switch has the same value but in opposite direction with respect to be voltage pr...
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JP7433549B2 |
A filter circuit (1) includes: a filter unit (8), which has transistors (12) and capacitors (13) connected to a signal line (6) and forming paths of N phases and in which the transistors (12), to which clock signals of N phases are appli...
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JP2024501843A |
[summary] A high performance filter bank channelizer is provided. In one implementation, the heterodyne signal shifts the input spectrum of the input signal by an offset between the input center and the output center and operates at a hi...
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JP2024501838A |
[summary] An analysis channelizer is provided. In one embodiment, the channelizer includes an M-pass filter that receives an input signal; a circular buffer in communication with the M-pass filter; and an M-point inverse fast Fourier tra...
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JP2023109737A |
To provide a method and apparatus for an analog bi-quad infinite impulse response (IIR) filter.In a system 100, an amplifier 108 generates a positive output signal 110 corresponding to a received RF signal, and a negative output signal 1...
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JP2023527636A |
The integrator circuit includes an operational amplifier, a first capacitor coupled to an input of the operational amplifier, a second capacitor, a second capacitor, a first terminal of the first capacitor coupled to the first switch the...
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JP2023074039A |
To provide an integration circuit having less power consumption.A feedback rate correction capacitor CR is provided between two input terminals of a difference type amplification circuit 15, and is connected at the time of a sampling and...
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JP7252323B2 |
Described are concepts, systems, circuits and techniques directed toward methods and apparatus for generating one or more pulse width modulated (PWM) waveforms with the ability to dynamically control pulse width and phase with respect to...
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JP2023039462A |
To provide a signal processing device and a signal processing method capable of separating a periodic signal (quasi-periodic signal) and an aperiodic signal (quasi-aperiodic signal) which have fluctuations in amplitude from estimated val...
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JP2023019281A |
To suppress leakage of electric charges from capacitances even when fluctuation in voltage at capacitance terminals is large at phase transitions of an operation.A switched capacitor circuit is configured by a fully-differential operatio...
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JP7126529B2 |
Described is a phase-switched phase-switched, impedance modulation amplifier (PSIM). The PSIM has an input that can be coupled to a source and an output that can be coupled to a load. The PSIM includes one or more phase-switched reactive...
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JP2022110070A |
To provide a radio frequency (RF) amplification system allowing increased accuracy, faster impedance matching, enhanced tuning bandwidth over wide impedance ranges, and operation at high power levels with low insertion losses.In a radio ...
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JP7035986B2 |
A fluctuation suppression circuit suppresses fluctuation of a reference voltage supplied to a switched capacitor circuit having a differential configuration. The switched capacitor circuit includes an input capacitor for charging an inpu...
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JP6957005B2 |
An integrator includes a first switch, a first capacitor, a second switch, a second capacitor, an amplifier, a third switch, a forth switch, a third capacitor, and a control circuit. The control circuit repeats a first phase and a second...
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JP2021168433A |
To make it possible to increase a data rate of an analog signal while suppressing an increase in power consumption.A signal processing circuit includes: a first sampling capacitance and a second sampling capacitance connected to an input...
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JP6792436B2 |
To provide an incremental delta-sigma modulator of wide band and reduced power consumption, and an incremental delta-sigma AD converter.An incremental delta-sigma AD modulator 20 and AD converter comprises: a sample/hold part which inclu...
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JP6720687B2 |
To provide a circuit device, an oscillator, electronic equipment, a mobile body and the like, capable of suppressing generation of defects caused by frequency drift of an oscillation frequency and the like.A circuit device includes: an A...
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JP2020102803A |
To provide a proximity sensor that detects the distance between two coils.There is provided a proximity sensor that comprises: a reference signal generation circuit unit; a first coil; a second coil; a clock signal generation circuit uni...
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JP6705376B2 |
There is provided a variable RF filter receiving an input differential radio frequency signal from a differential input terminals and allowing a radio frequency signal around a desired frequency to pass therethrough, wherein first passiv...
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JP6686898B2 |
The present technology relates to a notch filter capable of easily obtaining a desired frequency characteristic. In an N-path filter unit, any one of a plurality of N capacitors is selected as a signal path through which a signal passes,...
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JP6685305B2 |
Described is a phase-switched phase-switched, impedance modulation amplifier (PSIM). The PSIM has an input that can be coupled to a source and an output that can be coupled to a load. The PSIM includes one or more phase-switched reactive...
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JP6636280B2 |
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JP6604688B2 |
A charge sharing filter includes a rotating capacitor, and a plurality of elementary filters, each elementary filter comprising: an elementary switch coupled between a first node of the respective elementary filter and a second node of t...
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JP6547546B2 |
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JP6509756B2 |
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JP6472275B2 |
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JP6438121B2 |
Provided is a sine wave multiplication device of simple configuration, broad input signal level range, and minimal fluctuation in characteristics due to temperature. A signal component that corresponds to a product of an input signal Si ...
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JP2018526868A |
The present invention relates to a filter circuit (200) including at least a first filter line (210). This first filter line (210) has a first input circuit (10), a first integrator circuit (20), and a first output circuit (30). This fir...
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JP2018509053A |
The present disclosure includes switching resonant filter circuits and methods. In one embodiment, the circuit comprises a plurality of resonant switching circuits configured in a three (3) or four (4) element PI network. In one embodime...
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JP6258270B2 |
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JP2017195543A |
To shorten the time up to when a signal generating circuit using an SCF type filter starts oscillating stably or has its phase locked.A signal generating circuit comprises: a voltage-controlled oscillator which generates a signal of freq...
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JP6215398B1 |
[Subject] A switched capacitor circuit which can improve performance of being offset-free is provided. [Means for Solution] Capacitor 21 is connected between a non-inversed input terminal of an operational amplifier, and voltage V1, Swit...
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JP6190066B2 |
Methods and apparatus, including computer program products, are provided for RF filtering. Related apparatus, systems, methods, and articles are also described.
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JP6158373B1 |
[Subject] Even if the number of this embodiment of signal values which calculate an average increases, it provides an equalization circuit which controls an increase in circuit area. [Means for Solution] An equalization circuit concernin...
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JP6134525B2 |
A first constant voltage is supplied to a variable capacitance in a switched capacitor, and the variable capacitance is effectively charged to the first constant voltage in each cycle of a sampling clock. A current generated by charging ...
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JP2017085536A |
To provide a circuit device, an oscillator, electronic equipment, a mobile body and the like, capable of suppressing generation of defects caused by frequency drift of an oscillation frequency and the like.A circuit device includes: an A...
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JP6118735B2 |
The sampling mixer circuit comprises: a clock generating circuit that outputs four-phase control signals the periods of which are in accordance with the carrier frequency of an input signal and the phases of which are different from one ...
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JP6097211B2 |
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JP2016184918A |
To provide a switch control circuit that can implement an operation equivalent to supply of a proper DUTY ratio to even a circuit operating at a high frequency.A switch control circuit includes a clock generation circuit 120 that generat...
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JP6009372B2 |
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JP5975435B2 |
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JP2016042627A |
To provide a fully differential switched capacitor circuit in which input variation of a fully differential operational amplifier can be suppressed when an in-phase input signal is inputted, while suppressing increase in the chip size or...
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JP5861909B2 |
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JP5825624B2 |
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JP2015211392A |
To provide a band pass filter which can suppress the deterioration of attenuation, by making unnecessary a duty conversion circuit.A 4-phase band pass filter includes: a load element 12 which converts an input current signal into an outp...
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JP2015201867A |
To provide passive switched-capacitor (PSC) filters that occupy smaller area and consume less power.A PSC filter 1000 implements a second-order infinite impulse response (IIR) filter with two complex first-order IIR sections. Each comple...
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JP5780300B2 |
A charge transfer circuit has a charge transfer unit including an input charge holding element holding an input charge, an output charge holding element holding an output charge, and a charge transfer element, provided between a first no...
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JP5755850B2 |
The discrete time analog circuit (100) is provided with: a rotate capacitor circuit (150); an amplifier (141) that is connected to the input line or the output line of the rotate capacitor (150), and amplifies the input potential or inpu...
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