|| List of recent Amplifier Circuit-related patents
| Class-d amplifier|
In a class-d amplifier, oscillation phenomenon is suppressed in a high rf range and surge voltage is reduced. An oscillation absorption circuit is connected on the power supply side of the class-d amplifier circuit, and the class-d amplifier circuit and thus connected oscillation absorption circuit equivalently configure an oscillation circuit.
Kyosan Electric Mfg. Co., Ltd.
| Radio frequency power amplifier circuit|
An rf power amplifier circuit has an input terminal for receiving an input signal having an input power, and an output terminal for outputting an output signal. The rf power amplifier circuit comprises three amplifier stages and an input power splitter for providing respective power fraction signals to respective inputs of each amplifier stage.
Freescale Semiconductor, Inc.
| Low power nanoelectronics|
Disclosed are low power electronic devices configured to exploit the sub-threshold swing, unidirectional tunneling, and low-voltage operation of steep slope-tunnel tunnel field-effect transistors (tfet) to improve power-conversion efficiency and power-efficiency of electrical systems incorporating the tfet as an electrical component to perform energy harvesting, signal processing, and related operations. The devices include a htfet-based rectifier having various topologies, a htfet-based dc-dc charge pump converter, a htfet-based amplifier having an amplifier circuit including a telescopic operational transconductance amplifier, and a htfet-based sar a/d converter having a htfet-based transmission gate dff.
The Penn State Research Foundation
| Sense amplifier circuit and semiconductor memory device|
To improve reading accuracy of a sense amplifier circuit and a semiconductor memory device. A sense amplifier circuit includes an n type fet which is a sensing transistor connected between a power supply and a ground via a data line that extends to a memory cell, a resistance element that is connected between a gate of the sensing transistor and the power supply, and a capacitance element that is connected between the gate of the sensing transistor and the ground..
Renesas Electronics Corporation
|Soft start circuit for switching converter and associated soft start method|
A soft start circuit for a switching converter, the soft start circuit has an internal soft start voltage generating circuit, an amplifier circuit and a buffer circuit, the internal soft start voltage generating circuit provides an internal soft start voltage, the amplifier circuit has a first input terminal receiving the internal soft start voltage, a second input terminal receiving a soft start reference signal and an output terminal, the buffer circuit has an input terminal coupled to the output terminal of the amplifier circuit and an output terminal providing the soft start reference signal. An external soft start capacitor coupled to the output terminal of the amplifier circuit is charged to provide an external soft start voltage, and the soft start reference signal is provided based on the internal soft start voltage and the external soft start voltage..
Chengdu Monolithic Power Systems Co., Ltd.
|Rf power amplifier with linearity control|
A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal..
Micro Mobio Corporation
|Current modulation circuit|
A modulated digital input signal is passed through a conditioning circuit to generate a first input signal. An error amplifier circuit receives the first input signal and a second input signal, and controls the operation of a mos transistor to generate an output signal that is current modulated.
|High frequency voltage supply monitor|
Various aspects provide a high frequency voltage supply monitor capable of monitoring high frequency variations of the voltage supply inside a microelectronic circuit substantially in real time. The voltage supply monitor can comprise a differential amplifier circuit having a substantially constant gain over a wide bandwidth, allowing the supply voltage variations to be amplified according to a known gain under a wide range of conditions.
Applied Micro Circuits Corporation
|Switching element drive circuit, power module, and automobile|
A switching element drive circuit of the present invention outputs a voltage to the switching element by use of a voltage output unit configured as an amplifier circuit having a voltage amplification factor of 1 to drive the switching element. When the switching element is turned on, a turn-on voltage having a value higher than a threshold voltage of the switching element and lower than a value of a voltage of a power supply of the switching element drive circuit is provided to the voltage output unit.
Mitsubishi Electric Corporation
|Low noise amplifier for mems capacitive transducers|
This application relates to amplifier circuitry for amplifying a signal from a mems transducer. A super source follower circuit (40) is provided which includes a feedback path from its output node (nout) to a control bias node (bc) in order to provide a preamplifier signal gain that may be greater than unity.
Cirrus Logic International Semiconductor Ltd.
A quasi-broadband amplifier according to the doherty principle
An amplifier comprises a first amplifier circuit, a second amplifier circuit, a hybrid-coupler circuit and a termination. The hybrid-coupler circuit comprises an output port and an isolation port.
Rohde & Schwarz Gmbh & Co. Kg
Position detecting device
The invention allows size reduction of a sensor of a position detecting device of a capacitive system, which detects a position indicated by an indicator. The sensor has plural electrode conductors that are disposed adjacent to each other and are configured to receive a signal from the indicator on a first surface of a substrate having the first surface and a second surface opposed to each other.
Wacom Co., Ltd.
Opto-electrical transceiver module and active optical cable
An opto-electrical transceiver module and an active optical cable comprising such a module are disclosed. The module includes a first printed circuit board and a second printed circuit board.
Magnetism detection device
An apparatus for detecting magnetism includes a self-exciting fluxgate type magnetic oscillation sensor in each of three axes perpendicular to one another, the magnetic oscillation sensor includin a magnetism sensor including a core-coil including a core made of a magnetic material and a coil wound around the core, and an operational amplifier circuit causing an ac excitation current to run through the coil to generate an output in accordance with a strength of an external magnetic field applied to the core. An air core coil not wound around a core is arranged in the vicinity of and in parallel with the core-coil of each of the magnetic oscillation sensors arranged in each of the axes..
Hano Manufacturing Co., Ltd.
A receiver circuit includes a first amplifier circuit to differentially amplify differential input signals by a linear operation, a second amplifier circuit configured to differentially amplify output differential signals of the first amplifier circuit by a limiting operation, a feedback circuit, first and second resistors coupled between the feedback circuit and outputs of the first amplifier circuit, and third and fourth resistors coupled between the feedback circuit and outputs of the second amplifier circuit. The feedback circuit amplifies a positive-phase signal that is output from a positive-phase output node thereof coupled to the first and third resistors, and a negative-phase signal that is output from a negative-phase output node thereof coupled to the second and fourth resistors, and feeds back a feedback signal after amplification to the first amplifier circuit..
Amplifier circuit and operation method thereof
Disclosed is an amplifier circuit capable of achieving high efficiency at back off power while maintaining high output power when an amplifier of a driving stage is saturated in a multistage amplifier in which a plurality of amplifiers are connected in series to each other. In the amplifier circuit, at least two amplifiers including a first amplifier and a second amplifier, the first amplifier preceding the second the first amplifier, are connected in series to each other, the second amplifier changes input impedance according to output power from the first amplifier, and an impedance adjusting unit for adjusting output load impedance of the first amplifier is disposed between the first amplifier and the second amplifier, wherein the impedance adjusting unit optimizes the output load impedance of the first amplifier according to a change of input impedance of the second amplifier..
Samsung Electronics, Co., Ltd.
High-frequency amplifier circuit
A high-frequency amplifier circuit (10) includes a high-frequency amplifying element (11), a bias circuit (12), and a bias adjusting circuit (13). The high-frequency amplifying element (11) includes an input end and an output end.
Murata Manufacturing Co., Ltd.
Flyback power converter and control circuit and control method thereof
The present invention provides a flyback power converter and a control circuit and a control method thereof. The flyback power converter includes: a power stage circuit, a voltage sense circuit, a current sense circuit, and a control circuit.
Richtek Technology Corporation
Differential amplifier circuit and display drive circuit
A differential amplifier circuit and display drive circuit having the same are disclosed herein. In one example, a differential amplifier circuit includes a differential pair transistor configure to receive a differential input signal.
Synaptics Display Devices Kk
A semiconductor device comprises a first input terminal; a second input terminal; an inverting amplifier circuit that comprises an input node connected to a first input terminal, an inverting input node connected to a second input terminal, and an output node connected to an output terminal, amplifies a difference between a first input signal supplied to the input node and a second input signal supplied to the second input terminal, and that outputs an output signal whose polarity is inverted from that of the first input signal to the output node; and a non-inverting amplifier circuit that comprises an input node connected to a second input terminal, an inverting input node connected to a first input terminal, and an output node connected to an output terminal, amplifies a difference between the first input signal and the second input signal, and that outputs an output signal whose polarity is the same as that of the first input signal to the output node.. .
Ps4 Luxco S.a.r.l.
High-frequency amplifier circuit
A high-frequency amplifier circuit (10) includes a high-frequency amplifier (101) and a bias circuit (20). The bias circuit (20) includes bias control elements (102, 103).
Apparatus and methods for power amplifiers
Apparatus and methods for power amplifiers are disclosed. In one embodiment, a power amplifier circuit assembly includes a power amplifier and an impedance matching network.
Amplifier circuit with overshoot suppression
An amplifier circuit with an overshoot suppress scheme is provided. The amplifier circuit includes an input amplifier, an output amplifier and a diode device.
Power amplifier circuit for communication systems
A power amplifier includes an input for receiving an rf signal to be amplified; at least one power amplification circuit module in electrical connection with the input for amplifying the rf signal; at least one biasing circuit in electrical connection with the power amplification circuit for compensating the distortion of the rf signal so as to amplify the rf signal substantially linearly, and an output arranged to output the amplified rf signal.. .
Doherty power amplifier circuit
A doherty power amplifier circuit is provided, which includes a power divider circuit, and a power amplifier circuit connected with the power divider circuit; this doherty power amplifier circuit further includes a combination output circuit connected with the power amplifier circuit, wherein the combination output circuit is a rheostat filter coupler, or a rheostat filter, or a rheostat coupler. By adopting the circuit, the size of a power amplifier circuit can be reduced, the cost of the power amplifier circuit can be lowered, and the efficiency of a power amplifier can be improved..
Semiconductor device and electronic device
Provided is a semiconductor device which can achieve a reduction in its area, reduction in power consumption, and operation at a high speed. A semiconductor device 10 has a structure in which a circuit 31 including a memory circuit and a circuit 32 including an amplifier circuit are stacked.
Power amplifier circuit capable of adjusting gaiin dynamically
The invention provides a power amplifier circuit capable of adjusting gain dynamically. The power amplifier circuit comprises a power supply unit configured to provide a power supply signal; an input power detection unit for receiving at least one input signal and the power supply signal, detecting the power of the input signal to generate a detection signal, and pulling up or down a bias signal by the detection signal; a power amplifier unit for receiving the input signal and the bias signal, adjusting the gain by the controlling of the bias signal, and amplifying the input signal by the adjusted gain to output at least one output signal.
Transducer amplification circuit
A transducer amplification circuit may include a preamplifier circuit with a signal input receiving a transducer signal to provide an amplified transducer signal comprising audible frequency components and ultrasonic frequency components. The transducer amplification circuit may include a first sigma-delta modulator configured to sample and quantize the amplified transducer signal to generate a first digital transducer signal comprising a first quantization noise signal.
Analog Devices Technology
Operational amplifier circuit and enhancing driving capacity thereof
An operational amplifier circuit configured to drive a load is provided. The operational amplifier circuit includes an output stage module.
Novatek Microelectronics Corp.
Semiconductor circuit and amplifier circuit
An amplifier circuit outputs a control signal for controlling a control target circuit and receives input of a feedback signal from the control target circuit. The amplifier circuit and the control target circuit constitute a feedback loop that includes a plurality of poles.
Single-input multiple-output amplifiers with simultaneous multiple gain modes
A device includes at least one first amplifier circuit configurable to receive and amplify an input radio frequency (rf) signal having a first carrier at a first input signal level and provide a first amplified rf signal, and at least one second amplifier circuit configurable to receive and amplify the input rf signal having a second carrier at a second input signal level and provide a second amplified rf signal, the at least one first amplifier circuit having a first input impedance, the at least one second amplifier circuit having a second input impedance.. .
Multi-stage switched-capacitor dc blocking circuit for audio frontend
An integrated dc blocking amplifier circuit, including: an operational amplifier configured in a differential amplifier; and at least first and second two-stage switched-capacitor circuits, each two stage switched-capacitor circuit including a first-stage circuit and a second-stage circuit, wherein the first two-stage switched capacitor circuit is connected to a positive feedback path of the operational amplifier and the second two-stage switched capacitor circuit is connected to a negative feedback path of the operational amplifier, wherein the first-stage circuit is switched at a relatively low switching frequency, while the second-stage circuit is switched at a relatively high switching frequency.. .
Buffer amplifier circuit
Amplifier circuits implemented with a buffer amplifier with a voltage gain substantially equal to one. In one example, a continuous-time amplifier is implemented by applying the input source across the input and the output terminals of the buffer amplifier.
Spurious signal mitigation for carrier aggregation amplifier
A device includes an amplifier circuit comprising a plurality of amplification paths, and at least one switchable bypass capacitance coupled to an associated shared power distribution network, the at least one switchable bypass capacitance and at least one of the plurality of amplification paths responsive to a control signal configured to selectively ground the at least one switchable bypass capacitance and selectively enable the at least one of the amplification paths based on a selected operating mode.. .
Emulated peak current limit scheme for switching regulator
An apparatus comprises a switching circuit, an error amplifier circuit, a current threshold circuit, and an over-current detection circuit. The switching circuit provides a switching duty cycle that includes a charge portion and a discharge portion.
Wireless power supply apparatus
In a wireless power supply apparatus, a first unit electrically connected to a power supply and a second unit electrically connected to an electric load. Power transmission is performed wirelessly between the first and second units using a magnetic resonance phenomenon.
Nippon Soken, Inc.
Reference circuit to compensate for pvt variations in single-ended amplifiers
The disclosure relates to semiconductor memory devices and related methods. A semiconductor memory device comprises: a single-ended sense amplifier circuit for reading data sensed from selected memory cells in a memory array, the sense amplifier having a first node used to feed in a reference signal, a second node coupled to a bit line, and sense transistors responsible for amplifying the content of a selected memory cell during a sense operation, a reference circuit having replica transistors of the sense transistors and further comprising a regulation network designed so that each replica transistor operates in a stable operating point, and wherein the regulation network generates a control voltage that is applied to the sense amplifier circuit..
To provide a voltage regulator capable of maintaining the accuracy of an output voltage even if it is set to an arbitrary output voltage. A voltage regulator includes an output transistor comprised of an nmos transistor having a backgate grounded, an error amplifier circuit configured to amplify and output a difference between a divided voltage obtained by dividing an output voltage outputted from the output transistor and a reference voltage and thereby to control a gate of the output transistor, a constant voltage circuit, and a transistor having a gate inputted with a voltage of the constant voltage circuit, a drain connected to the gate of the output transistor, and a source connected to a source of the output transistor..
Seiko Instruments Inc.
Method and low-level input sense amplification
A sense amplifier is disclosed that includes an amplifier circuit configured to receive, at an input, an input signal including an input level, the amplifier circuit configured to provide an amplified output signal including a gain with respect to the input level; and a feedback circuit coupled to receive the amplified output signal from the amplifier circuit, the feedback circuit configured to provide, at the input of the amplifier circuit, an adjusted version of the amplified output signal including a modified output magnitude based on common mode feedback.. .
Digital to analog converter discharge circuit and associated analog to digital converter circuits
A circuit includes an amplifier circuit that receives a residue voltage from an output capacitor connected to an output of a digital to analog converter (dac). The dac is employed in a pipeline stage of an analog to digital converter (adc).
Texas Instruments Incorporated
System and adaptive linearization of rf amplifiers
A variable-bias power amplifier is provided, comprising: a first variable voltage source generating first bias voltages based on bias control signals; a first amplifier circuit amplifying an output rf signal to generate a first amplified signal based on the first bias voltages; a second variable voltage source generating second bias voltages based on the bias control signals; a second amplifier circuit amplifying the output rf signal to generate a second amplified signal based on the second bias voltages; and a dc isolation circuit between the first amplifier circuit and the second amplifier circuit, electrically isolating dc currents at the first amplifier from dc currents at the second amplifier, wherein the first variable voltage source can be controlled independently from the second variable voltage source, and the first amplifier circuit, the second amplifier circuit, and the dc isolation circuit are all formed on a single die.. .
Freescale Semiconductor, Inc.
Acoustic sensor and ultrasound probe
Disclosed is an acoustic sensor including a semiconductor chip comprising two or more transistors. At least two of the transistors are each connected to a piezoelectric thin film, and the piezoelectric thin film is directly or indirectly disposed over a semiconductor substrate such that a conduction state of each of the at least two transistors varies in response to a pressure of sound waves incident on the piezoelectric thin film, and the two or more transistors are connected to constitute a single amplifier circuit so as to add up and amplify a signal with a strength in response to the conduction state of each of the at least two transistors, and output the amplified signals..
Konica Minolta, Inc.
To provide a semiconductor device which includes a novel refresh circuit in a memory including an oxide semiconductor film. As circuits which operate in a refresh operation of the memory including the oxide semiconductor film, a sense amplifier circuit, a latch circuit, a first switch, and a second switch are provided.
Semiconductor Energy Laboratory Co., Ltd.
Systems and methods for distortion characterization
Systems, methods, devices and circuits for data amplification, and more particularly systems and methods for characterizing distortion introduced during data amplification. In some cases, an amplifier modeling circuit is discussed that receives a preamplifier status input from a preamplifier circuit; applies a vector fitting algorithm to the preamplifier status to yield a pole value; determines that the pole value is greater than unity; and replaces the pole value with an inverse of the pole value when the pole value is greater than unity..
System and processing magnetic resonance signals
A magnetic resonance (mr) receiver is described herein. The mr receiver can be used to process nuclear magnetic resonance (nmr) signals.
Schlumberger Technology Corporation
Detection circuit, sensor device and electronic apparatus
A detection circuit includes a pyroelectric element, an amplifier circuit, a first switching element and a second switching element. The amplifier circuit includes a transistor in which a detection signal from the pyroelectric element is inputted to a gate.
Seiko Epson Corporation
Solid-state image pickup device and driving the same
A solid-state image pickup device which includes, on a semiconductor substrate, an image pickup area which includes plural columns of pixels, and plural column amplifier circuits each provided at each column of pixels or at every plural columns of pixels, wherein: each of the column amplifier circuits includes at least two amplifier circuit stages; a preceding amplifier circuit is a variable-gain amplifier circuit and the switchable gains include plural one or more gains; and a subsequent amplifier circuit is capable of amplifying, at one or more gains, the signal amplified at one or more gains in the preceding amplifier circuit.. .
Canon Kabushiki Kaisha
Radio communication apparatus and interference signal detection method
Until when a desired signal is received in a reception mode, a level comparator extracts a portion of a frequency-domain signal output from a fourier transformer, the portion matching with the frequency of the desired signal, and, when the reception level of the extracted portion matching with the frequency of the desired signal is higher than a predetermined threshold value, determines that an interference signal exists. An lo frequency controller sets the frequency of a local signal (lo) based on the determination result in the level comparator such that the frequency of intermodulation distortion caused by the interference signal becomes an intermediate frequency of the frequency band of the desired signal.
An amplifier circuit includes: plural transistors; plural first transmission lines respectively connected between input terminals of the plural transistors; plural second transmission lines respectively connected between output terminals of the plural transistors; an input node connected to the input terminal of a first stage transistor among the plural transistors; an output node connected to the output terminal of a final stage transistor among the plural transistors; and a capacitance connected to the output terminal of the first stage transistor via a third transmission line.. .
Capacitor circuit for a quasi-broadband doherty amplifier
An amplifier provides a first amplifier circuit, a second amplifier circuit, a first hybrid-coupler circuit and a termination. The hybrid-coupler circuit provides an output terminal and an insulation terminal.
Rohde & Schwarz Gmbh & Co. Kg
Inspection sensor device and sensor device
In a reset period of a first stage, a switching circuit is turned on, and high-level driving voltages are output from driving circuits. In a charge transfer period subsequent to the reset period, the switching circuit is turned off, and low-level driving voltages are output from the driving circuits.
Alps Electric Co., Ltd.
Amplifier circuit and amplifier circuit ic chip
An amplifier circuit includes a converter configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter is converted to a voltage value and then amplified. The converter includes variable resistance sensors of piezoresistance elements.
Asahi Kasei Microdevices Corporation
Amplification device and radio communication apparatus equipped with amplification device
An amplification transistor has a collector to which a voltage converted by a dc/dc converter is supplied. An output voltage of the dc/dc converter is determined based on an input impedance of a rear-stage circuit block.
Sharp Kabushiki Kaisha
Amplifier circuit, biasing block with output gain compensation thereof, and electronic apparatus
An exemplary embodiment of the present disclosure illustrates an amplifier circuit comprising an amplifier block and a biasing block. The amplifier block is used to receive an input signal and amplify the input signal to generate an output signal.
Advanced Semiconductor Engineering Inc.
Novel sense amplifier scheme
A sense amplifier circuit includes a pair of data lines, a pair of inverters, and a data line charging circuit. Each of the inverters is connected to a respective one of the data lines.
Taiwan Semiconductor Manufacturing Company Limited
Test device, test method, and program
When static electrical charge by electromagnetic waves is applied to a test-target board or test noises are applied to the ground of the test-target board, a test device tests as to whether or not noises are conducted through a path from an out terminal of an amplifier circuit to the ground of the test-target board, and a test device tests as to whether or not noises are conducted through a path from an out terminal of an amplifier circuit to the ground of the test-target board together with the number of conductions.. .
Mitsubishi Electric Corporation
Image sensor array with external charge detection circuitry
An image sensor may include an array of pixels that, do not include any source follower, reset, or addressing transistors, which helps to increase pixel well capacity, reduces or eliminates random telegraph signal (rts) noise, and reduces undesirable dark current. Charge to voltage conversion may be performed by charge detection circuitry that is external to the array of pixels.
Semiconductor Components Industries, Llc
A bandpass filter is provided that prevents clock leakage to the input side of an amplifier circuit and has excellent out-of-passband signal attenuation. It includes an amplifier (102) connected between an input terminal and an output terminal, an impedance frequency conversion circuit (101) that is connected between an output of the amplifier and ground and changes impedance depending on whether or not the frequency of a signal output from the amplifier is within a predetermine passband, and a feedback circuit (103) connected between the output and an input of the amplifier..
An amplifier circuit has a plurality of amplifiers configured to be connected in series, and each of the plurality of amplifiers has an amplifying element configured to non-inverting amplify a signal and a phase adjustment element configured to be connected to an output terminal of the amplifying element and to adjust a phase of the signal, wherein the amplifying element is subjected to negative feedback, and wherein a stability coefficient of a circuit in which the amplifying elements of the number the same as the number of the plurality of amplifiers are connected in series is less than 1.. .
Semiconductor device and power supply device
A power supply topology is used in which a transistor is provided on the side of an output node of a rectifying circuit. An inductor is provided on the side of a reference node, a resistor is inserted between the transistor and the inductor, and one end of the resistor is coupled to a ground power supply voltage of a pfc circuit.
Renesas Electronics Corporation
Amplifier circuit, antenna module and wireless communication apparatus
An amplifier circuit that amplifies a carrier wave that a transmitting and receiving part has received, and includes a superimposition wave generation part that generates a superimposition wave to be superimposed onto the carrier wave; an amplifying part that adds the carrier wave and the superimposition wave to obtain an amplified carrier wave and outputs the amplified carrier wave; and an amplitude detection part that detects, based on a change in an amplitude value of the carrier wave, that the carrier wave is a predetermined carrier wave that carries a predetermined communication signal. The amplifier circuit outputs the amplified carrier wave when having detected the predetermined carrier wave..
Ricoh Company, Ltd.
Transmitter with predistorter
A power amplifier circuit includes an amplifier mosfet and a predistorter mosfet. The predistorter mosfet source and drain are connected together, and the predistorter mosfet is connected between the gate of the amplifier mosfet and a second bias voltage signal.
Skyworks Solutions, Inc.
Cancellation of distortion induced by elevated op-amp bias current
An operational amplifier circuit reduces signal distortion in switching circuits resulting from flow of bias current through an analog switch having a resistance that changes with a common mode voltage level. The circuit includes an operational amplifier, and first, second, and third switches monolithically integrated on a same integrated circuit substrate.
Linear Technology Corporation
Fan control circuit
The present invention is to provide a fan control circuit, which includes a filter circuit for converting a pulse-width modulation (pwm) voltage signal into a dc voltage signal; an amplifier circuit having an input end for receiving the dc voltage signal and a static voltage signal and generating an amplified voltage signal at an output end thereof; a current expansion circuit configured to perform current expansion on the amplified voltage signal and thereby generate a driving voltage signal for a fan; and a feedback circuit connected between another input end of the amplifier circuit and an output end of the current expansion circuit so that magnitude of the driving voltage signal is in direct proportion to the duty cycle of the pwm voltage signal and is greater than or equal to a lowest driving voltage value of the fan when the duty cycle of the pwm voltage signal approaches zero.. .
Alpha Networks Inc.
Switching regulator and control method thereof
A switching regulator including an output switch element; a rectification switch element; an oscillation circuit; an error amplifier circuit; a slope circuit; a first voltage comparison circuit; a second voltage comparison circuit; a one pulse generation circuit; a control circuit; and a backflow detection circuit, and a control method thereof suppress variations to be stabilized with respect to a target value of the load current for switching between a pwm control and a pfm control, and ensure the switching from the pfm control to the pwm control or from the pwm control to the pfm control even if various parameters including external elements such as chips, coils, and capacitors vary.. .
Ricoh Electronic Devices Co., Ltd.
Dc/dc converter and electronic apparatus
To provide a dc/dc converter equipped with a clamp circuit having low power consumption, and reducible in chip area. A clamp circuit which clamps an output terminal of an error amplifier circuit equipped with an amplifier and a first transistor connected to an output terminal of the amplifier is configured to include a second transistor having a source connected to a source of the first transistor, a gate connected to a constant voltage circuit, and a drain connected to a constant current circuit, and a third transistor having a gate connected to the drain of the second transistor and a drain connected to the output of the amplifier..
Seiko Instruments Inc.
Nmos-offset canceling current-latched sense amplifier
A resistive memory sensing method includes sensing outputs of an offset-cancelling dual stage sensing circuit (ocds-sc) by an nmos offset-cancelling current latched sense amplifier circuit (noc-clsa). The noc-clsa is configured with a reduced input capacitance and a reduced offset voltage.
Imaging apparatus and imaging system
An ad converting unit compares an output signal from an amplifier circuit after reset of a pixel with a reference signal of time-variable, outputs a first digital value, when the output signal from the amplifier circuit in a non-reset state of the pixel is larger than a threshold, sets a gain of the amplifier circuit to a first gain, when the output signal is smaller than the threshold, sets the gain of the amplifier circuit to a second gain larger than the first gain, further after the gain of the amplifier circuit was set to the first or second gain, compares the output signal from the amplifier circuit in the non-reset state of the pixel with the reference signal of time-variable, and outputs a second digital value. When resolutions of the first and second digital values differ, a correcting unit corrects a difference between the resolutions..
Canon Kabushiki Kaisha
Memristor linear modeling switched reluctance motor
A memristor linear modeling method for a switched reluctance motor. A non-inverting operational amplifier circuit and an inverting operational amplifier circuit are employed to construct a switched reluctance motor linear phase inductance characteristic element..
China University Of Mining And Technology
Semiconductor structures for enhanced transient response in low dropout (ldo) voltage regulators
Systems, semiconductor structures, electronic circuits and methods for enhanced transient response in low dropout (ldo) voltage regulators are disclosed. For example, a semiconductor structure for enhanced transient response in an ldo voltage regulator is disclosed, which includes a first current mirror circuit coupled to an input connection and an output connection of the ldo voltage regulator, a second current mirror circuit coupled to the input connection of the ldo voltage regulator.
Intersil Americas Llc
To provide a voltage regulator capable of preventing a reduction in output voltage and an increase in output noise in a steady state without performing suppression of an overshoot. A voltage regulator is equipped with an overshoot detection circuit which detects an overshoot on the basis of an output voltage, an overshoot suppression circuit which controls an output terminal of an error amplifier circuit, based on the output of the overshoot detection circuit, and a driver state discrimination circuit which discriminates the state of an output transistor, based on an output voltage of the error amplifier circuit.
Seiko Instruments Inc.
Magnetoresistive sensor and gradiometer
An object of the invention is to reduce 1/f noise and white noise at the same time by integrally reducing noise of an mr sensor and noise of an operation circuit part. A magnetoresistive sensor according to the invention includes a plurality of magnetoresistive sensor parts each having a bridge circuit in which four magnetoresistive elements are connected, and outputs of the respective magnetoresistive sensor parts are connected in parallel to one another to an input of an amplifier circuit (see fig.
Surgical cutting device
A surgical knife has been developed. The knife includes a blade with an edge that contacts tissue of a patient and a differential amplifier circuit that provides a signal of voltage and current to the blade at a certain frequency and waveform.
Preamplifier, optical receiver, optical termination device, and optical communication system
A current bypass circuit that passes part of a photocurrent output from a photodetector is connected to an input terminal of a current-to-voltage conversion amplifier circuit. A voltage obtained by level conversion of an output voltage by a voltage level conversion circuit is input into the current bypass circuit so that the current bypass circuit is turned on at a photocurrent that is smaller than the photocurrent at which a diode connected in parallel to a feedback resistor of the current-to-voltage conversion amplifier circuit is turned on.
Mitsubishi Electric Corporation
Provided is an amplifier circuit including an nmos transistor having a low drain breakdown voltage and an nmos transistor having a high drain breakdown voltage connected in series thereto, and capable of preventing breakdown of a drain of the nmos transistor having a low drain breakdown voltage. A clamp circuit configured to limit a drain voltage of the nmos transistor having a low drain breakdown voltage is connected to the drain thereof..
Seiko Instruments Inc.
Provided is a voltage regulator capable of preventing breakdown of a gate of an input transistor even when an overshoot occurs at an output terminal. The voltage regulator includes a diode, which is provided to an input transistor to which a divided voltage of an error amplifier circuit is input.
Seiko Instruments Inc.
Inter carrier-aggregation isolation in a receiver
A device includes a first amplifier circuit coupled to a first transformer and a second transformer, the first transformer selectively coupled to a first shared power distribution network through a first switch, the second transformer selectively coupled to a second shared power distribution network through a second switch.. .
Amplifier circuit, a/d converter, and communication apparatus
An amplifier circuit according to one embodiment includes an input terminal, an output terminal, an amplifier, a first switch, and a first signal setter. An input side of the amplifier is connected to the input terminal and an output side is connected to the output terminal.
Kabushiki Kaisha Toshiba
Method and adjusting peak power capability
One of the embodiments of the present disclosure relates to a method for adjusting peak power capability of a power amplifier circuitry. The power amplifier circuitry comprises at least one main amplifier path and at least one peak amplifier path and is configured to output a signal combining amplified signals from the at least one main amplifier path and the at least one peak amplifier path.
Guitar amplifier circuitry
Amplifier circuitry that is operative to provide selective control of the amplitude of a musical signal as the signal transitions from the pre-amplifier to power amplifier components of an electric guitar amplifier. According to a preferred embodiment, at least one low variable power amplifier is integrated into the signal path from the pre-amplifier to the power amplifier components of the guitar amplifier.
Bad Cat Holdings, Llc
Functionalized nanopipette biosensor
Disclosed are methods and devices for biomolecular detection, comprising a nanopipette, exemplified as a hollow inert, non-biological structure with a conical tip opening of nanoscale dimensions, suitable for holding an electrolyte solution which may contain an analyte such as a protein biomolecule to be detected as it is passed through the tip opening. Biomolecules are detected by specific reaction with peptide ligands chemically immobilized in the vicinity of the tip.
The Regents Of The University Of California
According to embodiments of the present invention, an over-input signal may be limited to be within a range between adjustable upper limit voltage and lower limit voltage while suppressing deterioration of a noise figure. An amplifier circuit includes an input transistor; an input transistor; a resistor element having a first terminal connected to a gate of the input transistor and a second terminal connected to a bias voltage; and a protective circuit connected to the gate of the input transistor and limiting an input to the gate of the input transistor to be within a range between an upper limit voltage and lower limit voltage adjustable based on the bias voltage..
Samsung Electro-mechanics Co., Ltd.
Image sensor with hybrid heterostructure
An image sensor architecture provides an snr in excess of 100 db, without requiring the use of a mechanical shutter. The circuit components for an active pixel sensor array are separated and arranged vertically in at least two different layers in a hybrid chip structure.
Output circuit, data driver, and display device
A display device includes an output circuit including a differential amplifier circuit, an output amplifier circuit that includes a first transistor of the first conduction type coupled between the first supply terminal and the output terminal, and including a control terminal coupled to the differential amplifier circuit, a first control circuit, an input terminal, an output terminal, and first to third supply terminals to which first to third supply voltages are applied, wherein the third supply voltage is set to a voltage between the first supply voltage and the second supply voltage, or the second supply voltage, and wherein the first control circuit includes a third transistor and a first switch which are coupled in series between the first supply terminal and the control terminal of the first transistor.. .
Renesas Electronics Corporation
The embodiments described herein relate to amplifier circuits with power rails. The power rails are generated in response to an input signal, which will typically be an audio signal, and with a sufficient magnitude to power the amplifier and to generate an output signal corresponding to the input signal..
Audera Acoustics Inc.
Voltage regulator and electronic apparatus
A voltage regulator is provided which can suppress an occurrence of overshooting in an output voltage at the time of starting a power source with a source voltage or the like. The voltage regulator includes an error amplifier circuit, an overshooting control circuit that is connected to the gate of an output transistor, and an on/off circuit that controls on and off states of at least the error amplifier circuit.
Seiko Instruments Inc.