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Amplifier Circuit patents



      
           
This page is updated frequently with new Amplifier Circuit-related patent applications. Subscribe to the Amplifier Circuit RSS feed to automatically get the update: related Amplifier RSS feeds. RSS updates for this page: Amplifier Circuit RSS RSS


Adaptive receiver/transmitter amplifier circuit

Auriga Measurement Systems

Adaptive receiver/transmitter amplifier circuit

Date/App# patent app List of recent Amplifier Circuit-related patents
06/25/15
20150180428
 Enhanced and versatile n-way doherty power amplifier patent thumbnailnew patent Enhanced and versatile n-way doherty power amplifier
The output of a carrier amplifier circuit in a doherty amplifier is coupled to the summing node so that the impedance observed by the carrier amplifier's output is approximately equal to the load impedance at the combining node when the load impedance is not modulated. In an example non-inverting configuration, a power amplifier circuit is configured to provide an amplified signal to a load at a summing node, where the load has a first impedance when not load-modulated.
Telefonaktiebolaget L M Ericsson (publ)
06/25/15
20150180426
 Adaptive receiver/transmitter amplifier circuit patent thumbnailnew patent Adaptive receiver/transmitter amplifier circuit
A smart amplifier circuit is disclosed. The amplifier circuit comprises a processor configured to receive a state control signal and generate a plurality of control signals, a power amplifier configured to provide an amplified rf signal that is a function of the rf input signal and the first control signal, and a tunable matching network configured to receive a second control signal and to provide a tuned, amplified rf output signal as an output that is a function of the amplified rf signal and the second control..
Auriga Measurement Systems, Llc
06/25/15
20150174896
 Ink jet recording device and short circuit protection  ink jet recording device patent thumbnailnew patent Ink jet recording device and short circuit protection ink jet recording device
An ink jet recording device comprises: an ink jet recording head for discharging an ink droplet; and a recording control part for outputting a drive signal to cause the ink jet recording head to discharge en ink droplet, wherein the recording control part includes a current amplifier circuit for amplifying a drive signal by active elements connected in multi-stages, and the current amplifier circuit includes a current interruption element connected to an input side of the active element of the current amplifier circuit on a power source side, the current interruption element being for preventing damage of the active element due to an overcurrent from occurring when a short circuit of the drive signal is generated.. .
Ricoh Company, Ltd.
06/18/15
20150171808
 Small signal amplifier circuit patent thumbnailSmall signal amplifier circuit
A signal amplifier circuit may include a bias circuit unit generating a first bias voltage, a level shifting circuit unit shifting a level of an input alternating current (ac) signal by an amount equal to a predetermined direct current (dc) shifting voltage so as to provide a first signal, and a first amplification unit amplifying a difference signal between the first bias voltage and the first signal, the first bias voltage and the dc shifting voltage being generated by circuits having the same characteristics.. .
Samsung Electro-mechanics Co., Ltd.
06/18/15
20150171731
 Voltage regulator patent thumbnailVoltage regulator
Provided is a voltage regulator configured to suppress a variation of an output voltage so as to stably operate even when a power supply voltage varies. The voltage regulator includes a control circuit having an input terminal connected to a drain of an output transistor, and an output terminal connected to an error amplifier circuit.
Seiko Instruments Inc.
06/18/15
20150170718
 Sense amplifier circuit capable of determining amplification factor of cell current based on operation cycles patent thumbnailSense amplifier circuit capable of determining amplification factor of cell current based on operation cycles
A sense amplifier circuit may be used for read operation of a non-volatile memory. The sense amplifier circuit includes of a first pre-charge circuit, a second pre-charge circuit, a bias circuit, an enable circuit, a current mirror, a first comparator, a second comparator, a buffer and a counter.
United Microelectronics Corp.
06/11/15
20150162885
 Amplifier circuit and  amplifying a signal in an amplifier circuit patent thumbnailAmplifier circuit and amplifying a signal in an amplifier circuit
An amplifier circuit, comprising: an input, for receiving an input signal to be amplified; a power amplifier, for amplifying the input signal; a switched power supply, having a switching frequency, for providing at least one supply voltage to the power amplifier; and a dither block, for dithering the switching frequency of the switched power supply. The dither block is controlled based on the input signal.
Cirrus Logic International (uk) Limited
06/11/15
20150162883
 Amplifier circuit patent thumbnailAmplifier circuit
The present disclosure relates to an amplifier circuit (2) for a capacitive transducer (1), comprising a preamplifier (8) adapted to receive a transducer signal through an input node (9) and to provide an amplified signal at an output node (10), and a transconductance amplifier (11) comprising a first input (12) and an output (14), wherein the first input (12) of the transconductance amplifier (11) is connected to the output node (10), and the output (14) of the transconductance amplifier (11) is connected to the input node (9).. .
Epcos Ag
06/11/15
20150162882
 Power amplifier with wide band am-am feedback and digital pre-distortion patent thumbnailPower amplifier with wide band am-am feedback and digital pre-distortion
A system including an amplifier circuit configured to amplify an input and generate an output, a bias circuit configured to bias the amplifier circuit, and a feedback circuit configured to generate feedback based on the input and the output, and to adjust the bias of the amplifier circuit based on the feedback to reduce amplitude nonlinearity in the output. A digital pre-distortion circuit is configured to reduce phase nonlinearity in the output..
Marvell World Trade Ltd.
06/11/15
20150162876
 Amplifier circuit with cross wiring of direct-current signals and microwave signals patent thumbnailAmplifier circuit with cross wiring of direct-current signals and microwave signals
Provided is an amplifier circuit with cross wiring of direct-current signals and microwave signals, which includes: two branch sub-circuits being mirrors with each other and a third capacitor the sub-circuit includes a direct-current feeding circuit and a microwave signal circuit. The direct-current feeding circuit further comprising: a transistor core drain power-up port (vds) of a heterojunction field effect transistor (fet), a first micro-strip inductor, a first capacitor, a pair of third inductors, a pair of branched second inductors.
China Electronics Technology Group Corporation No.55 Research Institute
06/04/15
20150155879

Semiconductor integrated circuit and image sensor circuit


The semiconductor integrated circuit includes a first converting circuit that receives the input analog signal, analog-to-digital converts the input analog signal and outputs a resulting first digital signal. The semiconductor integrated circuit includes an amplifier circuit that receives a reference analog signal, which is obtained by the first converting circuit digital-to-analog converting the first digital signal, and the input analog signal and outputs an amplified signal responsive to the difference between the reference analog signal and the input analog signal.
Kabushiki Kaisha Toshiba
06/04/15
20150155833

Signal amplifier with active power management


A system for amplifying a signal with active power management according to one embodiment includes a first digital to analog converter (dac) circuit configured to provide a modulated carrier signal; a amplifier circuit coupled to the first dac, where the amplifier circuit is configured to amplify the modulated carrier signal; an output stage circuit coupled to the amplifier circuit, where the output stage circuit is configured to provide the amplified signal to a network; a second dac circuit configured to provide a full wave rectified envelope of the modulated carrier signal; and a switching regulator circuit including a voltage reference input coupled to the second dac circuit, where the switching regulator circuit is configured to provide a supply voltage to the output stage circuit and the supply voltage is modulated in response to the envelope received at the voltage reference input.. .
Intel Corporation
06/04/15
20150155014

Memory circuitry including read voltage boost


Memory circuitry 2 includes an array 4 of bit cells 6. One or more boost capacitors c1, c2 are connected to bit lines 8 running through the array 4 and serve to store a sample charge with a sample voltage difference during a sampling configuration of the boost capacitors c1, c2.
The Regents Of The University Of Michigan
06/04/15
20150153303

System for detecting electrical properties of a molecular complex


A system for detecting electrical properties of a molecular complex is disclosed. The system includes an electrode electrically coupled to a molecular complex that outputs an electrical signal affected by an electrical property of the molecular complex, wherein the effect of the electrical property of the molecular complex on the electrical signal is characterized by an expected bandwidth.
Genia Technologies, Inc.
06/04/15
20150150753

Instrumentation absolute value differential amplifier circuit and applications


An instrumentation absolute value differential amplifier (212) is used as part of an electroencephalogram, electromyogram or electrocardiogram to quantify the excitation state of a user, processing and transmitting this information as a control signal for a user feedback device. In one embodiment, this feedback device comprises a wireless sex toy (500) which responds to the sent control information, acting as a mind-controlled sex toy.
05/28/15
20150146475

Memory sense amplifier with multiple modes of operation


Memory circuitry comprising an array of 6t bit cells 6 in which columns of bit cells are coupled together via bit line pairs 8 connected to respective sense amplifier circuitry 10 is provided. The sense amplifier circuitry includes an inverter pair 12, 14 and control circuitry which is configured to control the sense amplifier circuitry to operate in a plurality of modes including an offset compensation mode, an amplification mode and a latching mode..
The Regents Of The University Of Michigan
05/28/15
20150145725

Navigation device and control reducing power consumption thereof


A navigation device includes an antenna to receive a satellite signal, a control unit to control provision of the satellite signal, an amplifier circuit for amplification of the satellite signal, and a positioning unit to position the navigation device based upon the satellite signal. When the navigation device has been successfully positioned, the control unit disables the amplifier circuit, and provides the satellite signal to the positioning unit for position calculation..
Mitac International Corp.
05/28/15
20150145611

Oscillator circuit, oscillator, electronic apparatus, and moving object


An oscillator circuit includes an oscillating amplifier circuit to which an oscillator element is connected, and which generates an oscillation signal, and a plurality of mos type variable capacitance elements each having two terminals, one of which is electrically connected to the oscillating amplifier circuit, the mos type variable capacitance elements have respective threshold voltages different from each other, a control voltage is applied to one of the terminals of each of the mos type variable capacitance elements, and a reference voltage is applied to the other of the terminals of each of the mos type variable capacitance elements. It is also possible for the mos type variable capacitance elements to be different from each other in dope amount of impurities to a semiconductor layer below a gate electrode..
Seiko Epson Corporation
05/28/15
20150145609

Clock signal generation circuit, detection device, sensor, electronic apparatus, and moving object


A clock signal generation circuit includes a cr oscillator circuit having a capacitor, a resistor, and an amplifier circuit, and a voltage generation circuit adapted to generate a power supply voltage, and then supply the cr oscillator circuit 170 with the power supply voltage vdos. An oscillation frequency of the cr oscillator circuit in a case in which a power supply voltage vddl is a fixed voltage has a positive temperature characteristic.
Seiko Epson Corporation
05/28/15
20150145604

High efficiency radio frequency power amplifier circuitry with reduced distortion


Radio frequency power amplifier circuitry includes an amplifier element, power supply modulation circuitry, and bias modulation circuitry. The amplifier element is configured to amplify an rf input signal using a modulated power supply signal and a modulated bias signal to produce an rf output signal.
Rf Micro Devices, Inc.
05/28/15
20150145598

Amplifier circuit


An amplifier circuit with at least one basic transistor, at least one load transistor, and at least one impedance element, the basic transistor being connected to the impedance element and the load transistor, an amplifier input and output, the amplifier input being connected to the gate contact of the basic transistor and the amplifier output being connected to a source contact of the load transistor. Here the amplifier circuit has at least two combined amplifying cells, with each combined amplifying cell respectively including a basic transistor, a load transistor, and an impedance element, with the basic transistor and the load transistor being non-complementary single-pin transistors, and arranged cooperating with the impedance element, and every combined amplifying cell has an input and an output, which cell input being connected to a gate contact of the basic transistor and which cell output being connected to a contact of the impedance element..
Fraunhofer-gesellschaft Zur Förderung Der Angewandten Forschung E.v.
05/28/15
20150145429

Electronic ballast circuit for lamps


An electronic ballast circuit includes a power factor correction circuit, a control and amplifier circuit, a ballast controller circuit and a ballast driver circuit. The ballast driver circuit includes a resonant circuit that connects to a lamp and a strike voltage limiter circuit that regulates the behavior of the resonant circuit.
Genesys Systems, Llc
05/28/15
20150145006

Semiconductor device and driving the same


The semiconductor device includes a plurality of pixels arranged in rows and columns, and first transistors fewer than the number of the plurality of pixels. The plurality of pixels each includes a photodiode and an amplifier circuit.
Semiconductor Energy Laboratory Co., Ltd.
05/28/15
20150145005

Transistor amplifier circuit and integrated circuit


Disclosed is a transistor having a first region of a first conductivity type for injecting charge carriers into the transistor and a laterally extended second region) of the first conductivity type having a portion including a contact terminal for draining said charge carriers from the transistor, wherein the first region is separated from the second region by an intermediate region of a second conductivity type defining a first p-n junction with the first region and a second p-n junction with the second region, wherein the laterally extended region separates the portion from the second p-n junction, and wherein the transistor further comprises a substrate having a doped region of the second conductivity type, said doped region being in contact with and extending along the laterally extended second region and a further contact terminal connected to the doped region for draining minority charge carriers from the laterally extended second region. An amplifier circuit and ic including such transistors are also disclosed..
Nxp B.v.
05/21/15
20150138865

Semiconductor memory device and driving method thereof


A semiconductor memory device in which capacitance of a capacitor is lower and integration degree is higher. A plurality of memory blocks is connected to one bit line bl_m.
Semiconductor Energy Laboratory Co., Ltd.
05/21/15
20150137894

Rf power amplifier and operating method thereof


A multiband rf power amplifier includes a first band rf amplifier circuit, a second band rf amplifier circuit and a second band power detection circuit. The second band rf amplifier circuit subjects an rf input signal having a frequency band to power amplification and generates an rf amplifier output signal.
Renesas Electronics Corporation
05/21/15
20150137892

Polarity-switching amplifier circuit


A polarity-switching amplifier circuit includes: a first amplifying transistor and a second amplifying transistor, a transformer which includes a primary winding and a secondary winding, and a polarity-switching controller. An unbalanced input signal is input to the first amplifying transistor and the second amplifying transistor.
Panasonic Intellectual Property Management Co., Lt D.
05/21/15
20150137885

Dual path rf amplifier circuit


A dual path rf amplifier circuit including two or more amplifiers that are configurable as to any combination of class of operation, biasing, and power ratio to achieve a desired power curve for the amplifier circuit. In one example, an rf amplifier circuit includes an input coupler that generates at least two coupled signals from an rf input signal, first and second rf amplifiers each configured to receive and amplify one of the coupled signals to generate first and second amplified signals, and an output coupler generate an amplified output signal based on the first and second amplified signals.
Auriga Measurement Systems, Llc
05/21/15
20150137884

Amplifier circuit


An amplifier circuit is disclosed comprising: an input terminal configured to receive a radio frequency input signal; an output terminal configured to provide a radio frequency output signal; a first transistor having a first collector, a first emitter, and a first base; a second transistor having a second collector, a second emitter, and a second base; a bypass switch; and a controller. The first base is connected to the input terminal and the second emitter.
Nxp B.v.
05/21/15
20150137882

Analog active low-pass filters


Apparatus and methods for high-frequency low-pass filtering are disclosed. A first resistor is operatively coupled between a first node and a second node.
Analog Devices, Inc.
05/14/15
20150130647

Current amplifier circuit, integrator, and ad converter


In one embodiment, a current amplifier circuit includes a first transistor, a first resistor, a second transistor, a second resistor, a first passive element, and a control circuit. The first transistor has a first terminal, a second terminal, and a control terminal.
05/14/15
20150130538

Differential amplifier circuit


In one embodiment, a differential amplifier circuit includes a first input terminal, a second input terminal, a first transistor, a second transistor, a third transistor, a current source, a first output terminal, a second output terminal, a first passive element, and a second passive element. The first (second) transistor has a control terminal connected to the first (second) input terminal.
05/07/15
20150123734

Quasi-doherty architecture amplifier and method


An amplifier including a main amplifier circuit and at least one peaking amplifier circuit. The peaking amplifier circuit is selectively operable to operate in combination with the main amplifier circuit.
Andrew Llc
05/07/15
20150123731

Amplifier circuit with cross wiring of direct-current signals and microwave signals


Disclosed is an amplifier circuit with cross wiring of direct-current signals and microwave signals. The circuit includes a circuit network unit formed of a direct-current feeding circuit and a microwave power signal circuit.
China Electronics Technology Group Corporation No. 55 Research Institute
04/30/15
20150116036

Amplifier circuit


An amplifier circuit includes: first and second nodes configured to receive input of differential signals; third and fourth nodes; a plurality of first inductors configured to be connected in series between the first and second nodes; a plurality of second inductors configured to be connected in series between the third and fourth nodes; a plurality of field effect transistors configured to have gates each configured to be connected between the plurality of first inductors, sources each configured to be connected to a reference potential node, and drains each configured to be connected between the plurality of second inductors; and a synthesizing unit configured to synthesize signals at the third and fourth nodes.. .
Fujitsu Limited
04/30/15
20150116012

Digital voltage ramp generator


According to some embodiments, an all digital ramp generator may use a string of series connected delays or digital to time-based circuits to perform voltage ramp generation. Thus in some embodiments conventional operational amplifier circuits and relaxation oscillators may be replaced for generating triangular ramp waveforms for dc to dc or direct time-based dc to dc converters.
04/23/15
20150109056

Class-d amplifier circuits


Methods and apparatus for class-d amplifier circuits with improved power efficiency. The circuit has an output stage with at least first and second switches and a modulator that receives an input signal to be amplified, sin, and a first clock signal fsw.
Wolfson Microelectronics Plc
04/23/15
20150108953

Voltage regulator


Provided is a voltage regulator including a leakage current sink circuit capable of suppressing an influence of a leakage current of an output transistor at high temperature, and reducing power consumption of the voltage regulator at normal temperature. The voltage regulator includes: a reference voltage circuit configured to output a reference voltage; an output transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage to output a feedback voltage; an error amplifier circuit configured to amplify a difference between the reference voltage and the feedback voltage, and output the amplified difference to control a gate of the output transistor; and a leakage current sink circuit connected to an output terminal and configured to be prevented from operating at normal temperature, and suppress an influence of a leakage current from the output transistor only at high temperature..
Seiko Instruments Inc.
04/16/15
20150102951

Delta-sigma modulator and delta-sigma a/d converter


The present invention relates to a delta-sigma-modulator and a delta-sigma-a/d converter. By speeding up the settling time constant of an integrator at the last stage with a simple configuration, the sampling frequency is sped up in the delta-sigma-modulator as a whole.
Toyota Jidosha Kabushiki Kaisha
04/16/15
20150102789

Voltage regulator


Provided is a voltage regulator capable of keeping the accuracy of an output voltage thereof even at high temperature. The voltage regulator includes: a reference voltage circuit configured to output a reference voltage; an output transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage to output a divided voltage; an error amplifier circuit configured to amplify a difference between the reference voltage and the divided voltage, and output the amplified difference to control a gate of the output transistor; a switching circuit configured to switch the divided voltage of the voltage divider circuit; and a temperature detection circuit configured to output a signal in accordance with temperature to control the switching circuit..
Seiko Instruments Inc.
04/09/15
20150097622

Amplifier circuit


An amplifier circuit has: a main amplifier connected between an input terminal and an output terminal, the main amplifier amplifying an input signal input to the input terminal and outputting an amplified signal to the output terminal; a compensation circuit comprising a variable delay circuit and a variable gain inverting circuit, the variable delay circuit receiving the input signal and outputting a delay signal with a delay time from the input signal, the variable gain inverting amplifier inverting and amplifying the delay signal with a gain and outputting a compensation signal to the output terminal; and a controller configured to control the gain of the pre-emphasis circuit and the delay time of the variable delay circuit to compensate a response of the main amplifier in a first frequency band lower than a base frequency of a target signal of compensation and in a low frequency band higher than zero hertz.. .
Sumitomo Electric Industries, Ltd.
04/09/15
20150097543

Voltage regulator


Provided is a voltage regulator including a leakage current correction circuit capable of keeping the accuracy of an output voltage of the voltage regulator even when an output voltage of a reference voltage circuit is decreased due to the influence of a leakage current. The voltage regulator includes: a reference voltage circuit configured to output a reference voltage; an output transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage to output a feedback voltage; an error amplifier circuit configured to amplify a difference between the reference voltage and the feedback voltage, and output the amplified difference to control a gate of the output transistor; and a leakage current correction circuit connected to an output terminal of the voltage divider circuit.
Seiko Instruments Inc.
04/02/15
20150094008

Weakly coupled rf network based power amplifier architecture


Rf communications circuitry, which includes a first group of rf power amplifier circuits and a first weakly coupled rf network, is disclosed. The first group of rf power amplifier circuits includes a first rf power amplifier circuit, which receives and amplifies a first rf amplifier input signal to provide a first rf amplifier output signal, and a second rf power amplifier circuit, which receives and amplifies a second rf amplifier input signal to provide a second rf amplifier output signal.
Rf Micro Devices, Inc.
04/02/15
20150093131

Optical sensor, image forming device, and correcting toner concentration


An optical sensor configured to irradiate an object area with light and receive reflected light, amplify a voltage in accordance with the reflected light by an amplifier circuit and a resulting voltage, the optical sensor comprising a recording medium recorded with information indicating a noise component calculated, based on characteristics of an input voltage and an output voltage of the amplifier circuit.. .
Omron Corporation
04/02/15
20150091667

Wideband impedance transformer


Embodiments of a low-complexity and potentially physically small wideband impedance transformer that can be used in a combining network of a wideband doherty amplifier are disclosed. In one embodiment, a wideband doherty amplifier includes doherty amplifier circuitry and a wideband combining network.
Telefonaktiebolaget L M Ericsson (publ)
04/02/15
20150091657

Methods and devices for thermal control in power amplifier circuits


Methods of turning on and/or turning off amplifier segments in a scalable periphery amplifier architecture are described in the present disclosure. The turning on and/or turning off the amplifier segments according to the various embodiments of the present can reduce spectral splatter in adjacent channels.
Peregrine Semiconductor Corporation
04/02/15
20150091656

Methods and devices for impedance matching in power amplifier circuits


Methods of turning on and/or turning off amplifier segments in a scalable periphery amplifier architecture are described in the present disclosure. The turning on and/or turning off the amplifier segments according to the various embodiments of the present can reduce spectral splatter in adjacent channels.
Peregrine Semiconductor Corporation
04/02/15
20150091655

Optimal envelope tracking reference waveform generation


A method and apparatus is provided to improve upon the efficiency of a power amplifier. Suitable hardware/software in the form of circuitry, logic gates, and/or code functions to construct an envelope tracking waveform of an input communications signal and modulate the input supply voltage based on power amplifier circuitry operational parameters such as slew rates..
Broadcom Corporation
04/02/15
20150091651

Wideband doherty amplifier


Embodiments of a low-complexity and potentially physically small wideband impedance transformer that can be used in a combining network of a wideband doherty amplifier are disclosed. In one embodiment, a wideband doherty amplifier includes doherty amplifier circuitry and a wideband combining network.
Telefonaktiebolaget L M Ericsson (publ)
04/02/15
20150091649

Pulsed dynamic load modulation power amplifier circuit


A power amplifier circuit for amplifying an envelope modulated radio frequency (rf) signal with improved linearity and efficiency includes a power amplifier, and a variable load matching circuit coupled to an output port of the power amplifier. The input impedance of the variable load matching circuit is changed such that an output power of the power amplifier is at a first output power level, or a second output power level which is higher than the first output power level..
Avago Technologies General Ip (singapore) Pte. Ltd
04/02/15
20150091648

Amplifier circuit and operation method thereof


An amplifier circuit and an operation method thereof are provided. The amplifier circuit includes two stages of amplifiers.
Novatek Microelectronics Corp.
04/02/15
20150091644

Class hd power amplifier


A multi-level amplifier including a converter circuit being supplied with a supply voltage and operable to generate at least two output voltages, a voltage comparator circuit adapted to compare each of the output voltages with the supply voltage to generate a driving signal, and an amplifier circuit being supplied with an analog input signal, the amplifier circuit including an analog-to-digital converter coupled to a power stage driver and power stage, wherein the power stage driver receives the driving signal from the voltage comparator.. .
Analog Devices Technology
04/02/15
20150090864

Optically enabled multi-chip modules


An optically enabled multi-chip module has an optical engine transceiver and a host system chip. The optical engine transceiver has an optical engine front-end and an optical engine macro.
Finisar Corporation
03/26/15
20150084711

Oscillation circuit, electronic apparatus, moving object, and manufacturing oscillation circuit


An oscillation circuit includes an oscillation amplifier circuit that causes an oscillating element to oscillate to generate an oscillation signal, and a correction circuit connected with the oscillation amplifier circuit. At least a power supply voltage is input to the oscillation amplifier circuit.
Seiko Epson Corporation
03/26/15
20150084698

Power amplifier circuit


Linearity and power efficiency in a power amplifier circuit are enhanced. The power amplifier circuit includes a first transistor that amplifies a signal input to the base and that outputs the amplified signal from the collector and a first capacitor that is disposed between the base and the collector of the first transistor and that has voltage dependency of a capacitance value lower than that of a base-collector parasitic capacitance value of the first transistor..
Murata Manufacturing Co., Ltd.
03/26/15
20150084695

Cascode amplifier


In one embodiment, a cascode amplifier includes an amplifier circuit, a replica circuit, a bias circuit, and a feedback circuit. The amplifier circuit includes a first transistor and a second transistor.
Kabushiki Kaisha Toshiba
03/26/15
20150084678

Phase locked loop circuit


A phase locked loop (pll) circuit is provided. The pll includes a voltage controlled oscillator (vco) for outputting an oscillation signal of a frequency corresponding to an inputted voltage, a frequency divider for dividing the oscillation signal and output a frequency-divided signal, a phase comparator for comparing a phase of the frequency-divided signal and the phase of an input signal from the outside and output a first phase comparison signal and a second phase comparison signal which have different polarities, a differential amplifier circuit for outputting a control voltage based on a voltage difference between the first phase comparison signal and the second phase comparison signal to the vco, a level shift circuit for outputting a level-shifted signal which is made by shifting a direct current level of the second phase comparison signal, and an amplifier circuit for outputting an amplified signal which is an amplified level-shifted signal..
Nihon Dempa Kogyo Co., Ltd.
03/26/15
20150084620

Magnetic sensor


Provided is a magnetic sensor capable of identifying an individual having a high offset voltage, which is a cause of an initial defect in magnetic characteristics, and changes over time. A cross-transmission switch is provided in a changeover switch circuit which transmits to an amplifier circuit a differential signal voltage output from a hall element, and the cross-transmission switch cross-transmits a signal in any one of a first period and a second period during which a current flowing into the hall element is switched by a control signal from a control circuit, to thereby determine and identify a magnitude of an offset voltage..
Seiko Instruments Inc.
03/19/15
20150078066

Semiconductor memory device and driving semiconductor memory device


A novel semiconductor memory device whose power consumption is low is provided. A source of a writing transistor wtr_n_m, a gate of a reading transistor rtr_n_m, and one electrode of a capacitor cs_n_m are connected to each other.
Semiconductor Energy Laboratory Co., Ltd.
03/19/15
20150077607

Solid-state imaging apparatus and imaging system


A solid-state imaging apparatus includes a pixel section in which a plurality of pixels are arranged in a matrix, a column signal line configured to output a pixel signal from the pixel section, a column amplifier circuit configured to invert and amplify the pixel signal, a bypass circuit configured to bypass the column amplifier circuit, an ad converter, and a control unit configured to change an operation mode of the ad converter in accordance with the operation of the bypass circuit.. .
Canon Kabushiki Kaisha
03/19/15
20150077188

Voltage follower amplifier


An amplifier circuit includes a first transistor, a second transistor, and a third transistor. The gate of the first transistor receives the input signal to the amplifier.
Lsi Corporation
03/19/15
20150077184

Amplifier circuit


An amplifier circuit includes: a first filter that receives input of amplitude information of an input signal, and performs filtering so that a gain of a frequency component higher than a first cutoff frequency becomes greater than a gain of a frequency component lower than the first cutoff frequency; a power supply circuit that has a low-pass filter characteristic, and receives input of amplitude information outputted from the first filter and generates a power supply voltage corresponding to the amplitude information outputted from the first filter; an amplifier that receives supply of the power supply voltage, and amplifies a signal based on the input signal; and a phase difference detector that detects a phase difference between the amplitude information of the input signal and the power supply voltage, wherein the first filter changes the first cutoff frequency in a direction in which the phase difference decreases.. .
Fujitsu Limited
03/19/15
20150077183

Current-feedback operational amplifier


An integrated, fully-differential current-feedback transimpedance operational amplifier circuit is disclosed. The circuit can be configured as a class-ab, low-impedance input stage, followed by an inverter-based, rail-to-rail output stage.
Analog Devices, Inc.
03/19/15
20150076567

Molecular receptor-based chemical field-effect transistor (chemfet) devices, systems, and methods for in-situ nitrate monitoring in field soils


Embodiments include a method for securing a membrane material to a gate of a molecular receptor-based chemical field-effect transistor (chemfet). The method can include casting a membrane material onto an exposed region of the gate, curing the membrane material, placing the chemfet into a mold, inserting a single application of impervious electrically insulative resin into the mold, and securing edges of the membrane material by the single application of the impervious electrically insulative resin, thereby physically preventing lifting off of the membrane material from the gate.
Suprasensor Technologies, Llc
03/12/15
20150071466

Read-out for mems capacitive transducers


Amplifier arrangements for read-out of mems capacitive transducers, such as low-noise amplifiers. An amplifier circuit has first and second mos transistors, with the gate of the first transistor driven by the input signal, and the gate of the second transistor driven by a reference.
Wolfson Microelectronics Plc
03/12/15
20150070023

Battery monitoring device and battery system monitoring device


A battery monitoring device for monitoring a cell group made by connecting a plurality of single battery cells in series including a first switching circuit configured to select, as a measurement target voltage, a type of voltage a differential amplifier circuit including a first input terminal and a second input terminal, configured to convert the measurement target voltage, which is selected by the first switching circuit and input between the first input terminal and the second input terminal, into a voltage in a predetermined range by performing differential amplification, and an ad converter configured to measure the measurement target voltage selected by the first switching circuit and converted by the differential amplifier circuit, and output a digital signal according to the measurement result, wherein an abnormality detection voltage, is output to the ad converter.. .
Hitachi Automotive Systems, Ltd.


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Amplifier Circuit topics: Amplifier Circuit, Semiconductor, Differential Amplifier Circuit, Differential Amplifier, Memory Cells, Semiconductor Device, Memory Cell, Semiconductor Substrate, Photodiode, Signal Processing, Memory Effect, Electronic Device, Electrical Signal, Storage Device, Communications

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