|| List of recent Amplifier Circuit-related patents
|Semiconductor integrated circuit device|
An output signal characteristic of a differential amplifier circuit is improved. When an input data signal becomes ‘low’, current flowing through a first transistor will decrease and potential at a connection (a node) between a first resistor and a second resistor will increase.
|Low power memory device|
A method of operation within a memory device is disclosed. The method comprises receiving address information and corresponding enable information in association with a memory access request.
|Circuits and methods related to low-noise amplifiers having improved linearity|
Disclosed are circuits and methods related to low-noise amplifiers (lnas) having improved linearity. In some embodiments, a radio-frequency (rf) amplifier circuit can include a first amplifying transistor configured to amplify an rf signal.
|Self-shielded di/dt transformer for a meter|
A sensor includes a core, first and second windings, an integrating amplifier circuit and a dc balancing circuit. The first and second windings are wrapped around the core.
|Complementary metal oxide semiconductor power amplifier|
An rf power amplifier circuit is disclosed. A driver amplifier stage includes a first set of a plurality of amplifier transistors in a cascode configuration, a driver amplifier stage input, and a driver amplifier stage output.
|Electrocardiographic waveform measuring apparatus|
An electrocardiographic waveform measuring apparatus mounted in a seat with a seat skin element includes: a sensor electrode at a seat interior side of the seat to be covered with the seat skin element; an insulating elastic element at the seat interior side of the sensor electrode in the seat opposite to the seat skin element to face the sensor electrode; a guard electrode at the seat interior side of the insulating elastic element in the seat opposite to the sensor electrode to be opposed to the sensor electrode through the insulating elastic element; and a housing case at the seat interior side of the insulating elastic element in the seat opposite to the sensor electrode to be opposite to the insulating elastic element. The housing case accommodates a sensor circuit with an amplifier circuit, to which a potential signal of the sensor electrode is initially input..
|Radio frequency power amplifier circuit and method|
An amplifier circuit is disclosed for providing a radio frequency output signal having a variable signal envelope, comprising a main amplifier device and an auxiliary amplifier and a combiner network for combining an output signal from said first amplifier device and a second output signal from said second amplifier device to provide a combined output signal of variable signal envelope to a load, and a signal processing circuit comprising an input and a non-linear processing section to provide at least said second radio frequency output signal with a signal envelope that has a non-linear dependency from an amplitude characteristic of the input signal such that the degree of non-linearity of the non-linear dependency varies dependent on the amount of change per time unit of the amplitude characteristic of the input signal. Further, a method of power amplifying a radio frequency signal having a variable signal envelope is disclosed..
|Tamper detection arrangement|
A tamper detection arrangement for use within an integrated circuit (1), the arrangement comprising: at least one input capacitor (4) having a first capacitance value; a feedback capacitor (5) having a second capacitance value; a sensing arrangement comprising an amplifier circuit having the at least one input capacitor as an input and the at least one feedback capacitor in a feedback loop across the amplifier operable to detect a change in the capacitance values between the at least one input capacitor and the feedback capacitor; and a protective shield to protect a sensitive area (2) of the integrated circuit from tampering, the shield being provided by the at least one input capacitor (4).. .
|Dimmable screw-in compact fluorescent lamp having integral electronic ballast circuit|
A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit generates a lamp current through the lamp tube having a substantially constant envelope such that flicker in the lamp tube and electromagnetic interference (emi) noise on an ac voltage supply are minimized.
A high-frequency module includes a wiring substrate including an electrode pattern layer and a via electrode, a plurality of amplifier circuits that are configured to respectively amplify signals in different frequency bands received at the input terminal, and a plurality of matching circuits and a plurality of filter circuits that are provided in correspondence with the respective amplifier circuits and that are connected sequentially to output sides of the respective amplifier circuits. A plurality of signal paths that extend from the output sides of the respective amplifier circuits to the antenna terminal through the corresponding matching circuits and the filter circuits are provided.
|High-frequency amplifier circuit, semiconductor device, and magnetic recording and reproducing device|
A high-frequency amplifier circuit includes a balanced-unbalanced converter converting a single-ended signal into differential signals. The output of a first amplifier amplifying the single-ended signal is connected to the signal terminal on the unbalanced side of the balanced-unbalanced converter.
|Differential amplifier circuit|
A differential amplifier circuit includes a differential amplification unit suitable for amplifying difference between signals of an input terminal and a complementary input terminal, receiving the same voltage level through the input terminal and the complementary input terminal at a measurement period, and receiving an input signal and a complementary input signal through the input terminal and the complementary input terminal, respectively, at an operation period, an offset control unit suitable for generating offset information using an output of the differential amplification unit at the measurement period, and an offset compensation unit suitable for compensating for an offset of the differential amplification unit in response to the offset information.. .
|Operational amplifier circuit|
An operational amplifier circuit including a main circuit, a compensation capacitor, a power circuit, and a set of switches is disclosed. The main circuit has an output terminal.
|Integrated rf front end with stacked transistor switch|
A monolithic integrated circuit (ic), and method of manufacturing same, that includes all rf front end or transceiver elements for a portable communication device, including a power amplifier (pa), a matching, coupling and filtering network, and an antenna switch to couple the conditioned pa signal to an antenna. An output signal sensor senses at least a voltage amplitude of the signal switched by the antenna switch, and signals a pa control circuit to limit pa output power in response to excessive values of sensed output.
|Circuits and methods for compensating for miller capacitance|
Amplifier circuits and methods of cancelling the miller effects in amplifiers are disclosed herein. An embodiment of an amplifier circuit includes an input and an output.
|Apparatus and method for transimpedance amplifiers with wide input current ranges|
Improved preamplifier circuits for converting single-ended input current signals to differential output voltage signals, including first and second transimpedance amplifiers with input transistors operating according to bias currents from a biasing circuit, output transistors and adjustable feedback impedances modified using an automatic gain control circuit, as well as a reference circuit controlling the bias currents according to an on-board reference current and the single-ended input or the differential output voltage signals from the transimpedance amplifiers.. .
|Power amplifier circuit based on a cascode structure|
A power amplifier circuit based on a cascode structure and to be powered by a power source voltage, e.g. A battery, said circuit comprising—a first transistor having a grid, source and drain terminal; said first transistor being connected in a common source mode;—a second grid source transistor having grid, source and drain terminal, said second transistor being connected in common grid mode;—a biasing circuit for biasing said first transistor and said second transistor.
|Amplifiers with boosted or deboosted source degeneration inductance|
Amplifiers with boosted or deboosted source degeneration inductance are disclosed. In an exemplary design, an apparatus includes an amplifier circuit and a feedback circuit.
|Operational amplifier circuit|
Aspects of the invention include an operational amplifier circuit having a construction of a rail-to rail input folded circuit and includes an n-mos differential pair composed of a pair of n-channel type mos-fets connected to a pair of voltage input terminals, and a p-mos differential pair composed of a pair of p-channel type mos-fets connected to the pair of voltage input terminals. In some aspects, a comparator determines whether an common mode input voltage to the n-mos differential pair and the p-mos differential pair is higher than a half of a power supply voltage or not, and either one of the n-mos differential pair and the p-mos differential pair is selectively operated according to the comparison result.
|Operational amplifier circuit|
In aspects of the invention, an operational amplifier circuit includes: an n-mos auxiliary current source connected in parallel to the n-mos differential pair, the n-mos auxiliary current source turning on when the n-mos differential pair turns off caused by a decreased common mode input voltage given to the pair of voltage input terminals, drawing a current from the active load for the p-mos differential pair. Aspects of the invention also include a p-mos auxiliary current source connected in parallel to the p-mos differential pair, the p-mos auxiliary current source turning on when the p-mos differential pair turns off caused by an increased common mode input voltage given to the pair of voltage input terminals, delivering a current to the active load for the-n-mos differential pair..
|Signal processing device|
A level shifter converting a binary signal having a first potential and a second potential into a signal having the first potential and a third potential, and a signal processing circuit using the level shifter are provided. The first potential is higher than the second potential.
|Power amplifier and communication device|
A power amplifier, includes: a first and a second amplifier circuits that are controlled so that one of them do not amplify a signal when another one of them amplifies the signal; a first impedance conversion circuit, coupled between the first amplifier circuit and the output terminal, that converts an output impedance of the first amplifier circuit; a second impedance conversion circuit, coupled between the second amplifier circuit and a wiring coupling the first impedance conversion circuit and the output terminal, that converts an output impedance of the second amplifier circuit; and a connection circuit that, when the first amplifier circuit amplifies the signal, forms a path which bypasses the second impedance conversion circuit between a reference potential and the wiring coupling the first impedance conversion circuit and the output terminal, by coupling a wiring coupling the first amplifier circuit and the output terminal, with the reference potential.. .
|Sense amplifier circuit and semiconductor device|
A single-ended sense amplifier circuit of the invention comprises first and second mos transistors and first and second precharge circuits. The first mos transistor drives the bit line to a predetermined voltage and switches connection between the bit line and a sense node and the second mos transistor whose gate is connected to the sense node amplifies the signal via the first mos transistor.
|Folded cascode amplifier circuit|
A folded cascode amplifier circuit includes: an input stage having a pair of transistors and configured to output a positive phase intermediate signal and an opposite phase intermediate signal; a cascode amplification stage having pairs of transistors connected in multiple stages, to which the positive phase intermediate signal and the opposite phase intermediate signal are supplied, and which is configured to output a positive phase output signal and an opposite phase output signal, which are differential signals; a first capacitor connected between a signal line of the positive phase intermediate signal and a signal line of the opposite phase output signal; and a second capacitor connected between a signal line of the opposite phase intermediate signal and a signal line of the positive phase output signal.. .
|Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff|
A system for a feedback amplifier with sub-40khz low-frequency cutoff is disclosed and may include amplifying electrical signals received via coupling capacitors utilizing an amplifier having feedback paths comprising source followers and feedback resistors. Gate terminals of the source followers may be coupled to output terminals of the amplifier circuit.
|Radio communication device, transmission circuit and buffer circuit|
According to one embodiment, a buffer circuit has a capacitor comprising a first terminal and a second terminal, an input signal being inputted to the first terminal, a first inverting amplifier circuit configured to invert and amplify a signal of the second terminal of the capacitor, a second inverting amplifier circuit configure to invert and amplify an output signal of the first inverting amplifier circuit, and a mos (metal oxide semiconductor) transistor comprising a third terminal, a fourth terminal and a gate, the third terminal being connected to the second terminal of the capacitor, the fourth terminal being connected to a connection node of the first and the second inverting amplifier circuits, an inversion signal of the input signal being inputted to the gate.. .
|Non-volatile semiconductor memory device|
According to one embodiment, a non-volatile semiconductor memory device which is provided with a memory cell array, bit lines, word lines, and a sense amplifier circuit is presented. The memory cell array includes memory cells.
|Non-volatile semiconductor memory device|
A non-volatile semiconductor memory device includes a memory cell configured to allow electrical writing and erasing, a bit line configured to transmit a potential corresponding to data stored in the memory cell in a column direction, a sense amplifier circuit configured to detect a potential of the bit line, and a bit line coupling circuit coupled between the bit line and the sense amplifier circuit. The bit line coupling circuit includes a first bit line coupling transistor in an outer layout area of the bit line coupling circuit and a second bit line coupling transistor in an inner layout area of the bit line coupling circuit.
|Piezoelectric element drive circuit|
A piezoelectric element drive circuit includes an h bridge circuit, an lpf-attached differential amplifier circuit, an amplifier circuit, and an inverter circuit. First and second drive signals output from the h bridge circuit and having opposite phases are applied to a piezoelectric element.
|Feedback mechanism for boost-on-demand amplifiers|
A method and an amplifier for amplifying audio signals include a signal processor for processing incoming audio samples in preparation for amplification by an electronic amplifier circuit. A voltage is received from a power supply.
A method and an amplifier for amplifying audio signals receive and process an incoming audio sample in preparation for amplification by an electronic amplifier circuit. A boost supply circuit receives a voltage from a power supply.
|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.
|Apparatus and method for asymmetrically driven partial outphasing power amplifier|
Apparatus and method embodiments are provided for improving power efficiency in an outphasing amplifier with a non-isolating combiner. The embodiments include reducing the driving power to two power amplifiers (pas) of the amplifier circuit in the low input signal power region in an asymmetric manner between the two pas.
|Split amplifiers with improved linearity|
Split amplifiers with configurable gain and linearization circuitry are disclosed. In an exemplary design, an apparatus includes first and second amplifier circuits and a linearization circuit, which may be part of an amplifier.
|High-frequency, broadband amplifier circuit|
According to one embodiment, a high-frequency, broadband amplifier circuit includes two drive elements, a matching circuit, a balun circuit, a power supply, and a power supply circuit. The matching circuit includes two pattern circuits.
|Ionized gas detector and ionized gas detecting method|
An ionized gas detector includes at least a pair of ion detecting electrodes that detect ions of the ionized measuring-subject gas, an electrode-voltage applying unit that applies a given voltage to the ion detecting electrodes, the electrode-voltage applying unit being configured to be capable of reversing its voltage polarity, a charge amplifier circuit having a charge capacitor that accumulates electric charges generated by voltage application by the electrode-voltage applying unit, an ion current calculating unit that calculates the value of an ion current of ions of the measuring-subject gas, based on a time-dependent change of the volume of electric charges accumulated in the charge capacitor of the charge amplifier circuit, and a concentration determining unit that determines the concentration of the measuring-subject gas, based on an ion current value calculated by the ion current calculating unit.. .
|Single supply amplifier with swing to ground|
An amplifier circuit has a voltage input terminal, for receiving vin, and a voltage output terminal, for outputting vout. A feedback circuit controls vout to match vin.
|Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes|
In various embodiments, a traveling wave amplifier circuit is disclosed. The traveling wave amplifier circuit is configured to receive an rf wave and an electron beam.
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 that a gain of a frequency component lower than a second cutoff frequency is greater than a gain of a frequency component higher than the second cutoff frequency, 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; and an amplifier that receives supply of the power supply voltage generated by the power supply circuit, and amplifies a signal based on the input signal.. .
|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.
|Analog-to-digital converter and solid-state imaging device|
An adc includes a comparator and first and second amplifier circuits including a fully-differential operational amplifier. The comparator converts an analog signal output from the operational amplifier into digital data.
|Level conversion circuit, multi-value output differential amplifier, and display unit|
A level conversion circuit includes: a multi-value output differential amplifier circuit including an inverting input section, an output section, and two or more non-inverting input sections; and an offset cancelling circuit configured to store, on each of a plurality of capacitors, an offset voltage that arises on each of the two or more non-inverting input sections of the multi-value output differential amplifier circuit, and subtract the offset voltages from an output voltage of the output section.. .
|Adaptive biasing technique for audio circuitry|
A circuit comprising a peak detector configured to receive a positive voltage input, a negative voltage input and a reference current source input and to output a peak signal data value. A fast attack current source control coupled to the peak detector and configured to generate a current source control signal as a function of the peak signal data value.
|Radiation imaging apparatus and radiation imaging system|
A radiation imaging apparatus includes a pixel array having pixels, a bias line applying a bias potential to converters of the pixels, a detection circuit which detects a current flowing to the bias line, and a control unit which detects a start of radiation irradiation to the pixel array based on an output from the detection circuit and controls a charge accumulation operation of the pixels in accordance with the detection. The detection circuit includes a differential amplifier circuit and a feedback path, and applies a potential corresponding to a reference bias potential to the bias line.
|Semiconductor memory device|
A sense amplifier circuit is divided into a plurality of sense amplifier groups. The plurality of sense amplifier groups are each further divided into a plurality of sense units.
|Symmetric baluns and isolation techniques|
Wideband balun having good performance characteristics for use in feeding differential antenna elements in array antennas, balanced amplifier circuits and other applications is described. Also described is a common mode isolation circuit suitable for integration with the balun..
|Amplifier circuit with improved slew rate|
An amplifier circuit for improved slew rate consists of three main sections, which are the common mode rejection stage, primary gain stage and the output stage. The main circuit is a modified version of the fully differential operational amplifier circuit.
|Operational amplifier circuit|
Provided is an operational amplifier circuit capable of operating with lower current consumption. An amplifier stage, a fir filter, and a sample and hold circuit are connected in series, thus enabling reduction of an input offset voltage and amplification of an input signal voltage without using an integral circuit.
|Enhanced doherty amplifier|
The disclosure relates to an enhanced doherty amplifier that provides significant performance improvements over conventional doherty amplifiers. The enhanced doherty amplifier includes a power splitter, combining node, a carrier path, and a peaking path.
There is provided a voltage regulator that stably operates without using a large phase compensation capacitance. The voltage regulator has a voltage 3-stage amplifier circuit comprised of a differential amplifier circuit, a first source ground amplifier circuit provided with a phase compensation circuit, and a second source ground amplifier circuit, which serves as an output circuit.
|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.
|Programmable transmit continuous-time filter|
A programmable-current transmit continuous-time filter (tx-ctf) system can be included in a radio frequency (rf) transmitter. The input of the tx-ctf can receive a baseband transmission signal, and the output of the tx-ctf can be provided to an upconversion mixer for conversion to rf for transmission.
|Sense amplifier circuit and semiconductor memory device|
A semiconductor device may comprise a first bit line, a second bit line, a memory cell connected to the first bit line, a bit line sense amplifier circuit and a control circuit. The bit line sense amplifier circuit may be coupled to the memory cell.
|Amplifier and wireless communication device|
In a power amplifier including an amplifier circuit unit for high power mode and an amplifier circuit unit for low power mode provided in parallel thereto between input and output of the amplifier and where, when one amplifier circuit unit is in an operating state, the other amplifier circuit unit is in a non-operating state, a cross-coupled capacitor is provided between a drain of one of two transistors in output side and a gate of the other transistor in the amplifier circuit unit for high power mode, and a series circuit where a switch and a capacitor are coupled in series is coupled between a drain of the transistor of output side in the amplifier circuit unit for low power mode and a ground, the switch being in a conducting state in high power mode operation and being in a non-conducting state in low power mode operation.. .
Provided is a device, including: a first terminal which receives an external clock signal; a clock generation circuit connected to the first terminal to generate an internal clock signal based on the external clock signal; word lines and bit lines; amplifier circuits connected to the bit lines, respectively; and a control unit. The control unit controls, in a test operation, at least one of the word lines to repeat a selected state and an unselected state in accordance with the internal clock signal during a first period, and maintains the amplifier circuits in an active state during the first period.
|Power amplifier apparatus and power amplifier circuit|
The present invention relates to a power amplifier apparatus and a power amplifier circuit thereof, the power amplifier circuit uses doherty circuit structure, and the final stage power amplifier circuit uses high electron mobility transistor (hemt) power amplifiers to achieve a carrier amplifier with the doherty circuit structure and a peak amplifier with the doherty circuit structure. The power amplifier apparatus and a power amplifier circuit thereof in the present invention improves the efficiency of the power amplifier..
|Operational amplifier circuit and method for enhancing driving capacity thereof|
An operational amplifier circuit configured to drive a load is provided. The operational amplifier circuit includes an output stage module.
|Sensing amplifier using capacitive coupling to realize dynamic reference voltage|
A sensing amplifier using capacitive coupling and a dynamic reference voltage, where the sensing amplifier circuit includes a bit line, configured to receive charging and discharging signals; a sensing amplifier, connected to the bit line and configured to receive the bit line and a reference voltage for comparison and configured to enlarge the voltage difference between a high point and a low point; and a reference voltage generator, connected to the sensing amplifier to generate the reference voltage required for the sensing amplifier to compare. The sensing amplifier effectively enhances sensing margin of the sensing amplifier circuit; and in addition, to accelerate the access speed, the sensing amplifier can easily determine the correct stored data and further quickly solve the problems of high-speed storing the data by the storage units..
|Mass analyser and method of mass analysis|
An electrostatic ion trap for mass analysis includes a first array of electrodes and a second array of electrodes, spaced from the first array of electrode. The first and second arrays of electrodes may be planar arrays formed by parallel strip electrodes or by concentric, circular or part-circular electrically conductive rings.