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Amplifier Circuit patents

      

This page is updated frequently with new Amplifier Circuit-related patent applications.




 Balancing sense amplifier for ethernet transceiver patent thumbnailBalancing sense amplifier for ethernet transceiver
An ethernet or other communications module can amplify and reinforce a signal received from a non-local source without requiring a transformer or other magnetic component. A semiconductor integrated difference amplifier circuit can be used to amplify and reinforce a differential mode component of the received signal, while also attenuating a common mode component of the received signal.

 Wireless receiver patent thumbnailWireless receiver
A wireless receiver includes an rf muting circuit that opens and closes a signal line of a demodulated signal according to a received carrier strength level, a noise muting circuit that opens and closes the signal line according to a noise level in the modulated signal, and an rf attenuation circuit that attenuates a rf signal handled in a rf amplifier circuit, and additionally includes a reception mode switching circuit which can simultaneously select at least any two values from those comprising one of a plurality of predetermined threshold values of the rf muting circuit, one of a plurality of predetermined threshold values of the noise muting circuit and one of a plurality of predetermined amount of attenuation of the rf attenuation circuits. This configuration allows to provide a wireless receiver having a stable reception characteristics without sound interruption or interferences in a multi-wave operation of wireless microphones..
Kabushiki Kaisha Audio-technica


 Method and  achieving very high-output signal swing from class-d amplifier patent thumbnailMethod and achieving very high-output signal swing from class-d amplifier
An apparatus and method are disclosed for providing output signal swings that are greater than the supply voltage in a class-d amplifier. The amplifier circuit boosts the voltage across the amplifier load, such as a loudspeaker, by using capacitors to “charge pump” the voltage across the load and thus increase the voltage temporarily.
Ess Technology, Inc.


 Balanced up-conversion mixer patent thumbnailBalanced up-conversion mixer
A balanced up-conversion mixer includes: a load circuit permitting a differential radio frequency (drf) current signal pair (sp) to flow out and outputting a drf voltage sp based on its impedance, a dc bias voltage and the drf current sp; a mixing circuit allowing the drf current sp to flow thereinto based on a differential intermediate frequency voltage sp, a differential oscillating voltage sp generated based on an oscillating voltage signal by a single-ended to differential conversion circuit, and first and second currents generated by a negative resistance compensation circuit based on a dc bias voltage; and a signal amplifier circuit amplifying the drf voltage sp to generate a differential output voltage sp.. .
National Chi Nan University


 Method and  achieving very high-output signal swing from class-d amplifier using fewer components patent thumbnailMethod and achieving very high-output signal swing from class-d amplifier using fewer components
An apparatus and method are disclosed for providing output signal swings that are greater than the supply voltage in a class-d amplifier. The amplifier circuit boosts the voltage across the amplifier load, such as a loudspeaker, by using capacitors to “charge pump” the voltage across the load and thus increase the voltage temporarily.
Ess Technology, Inc.


 Pvt robust closed loop cmos bias for linear power amplifier patent thumbnailPvt robust closed loop cmos bias for linear power amplifier
A biasing device for direct current (dc) biasing a linear power amplifier that comprises multiple linear power amplifier circuits that are ideally identical to each other; wherein the biasing device may include a replica circuit that is a replica of a linear power amplifier circuit of the multiple linear power amplifier circuits; and a bias control circuit; wherein the bias control circuit is configured to feed the replica circuit with one or more dc biasing signals thereby maintaining at a constant value a replica dc current that is consumed by the replica circuit, and maintaining at a fixed value a replica dc voltage of a replica output node of the replica circuit; and wherein the replica circuit is coupled the multiple linear power amplifier circuits and is configured to supply dc voltage bias signals that force each linear power amplifier circuit of the multiple linear power amplifier circuits to consume a linear power amplifier circuit dc current that equals the replica dc current, when the linear power amplifier circuit is fed with a linear power amplifier dc voltage that either equals the replica dc voltage or differs from the replica dc voltage by a fraction of the replica dc voltage.. .
Dsp Group Ltd.


 Impedance conversion circuit of condenser microphone patent thumbnailImpedance conversion circuit of condenser microphone
Provided is an impedance conversion circuit of a condenser microphone which includes a first electron tube operated in grounded-cathode mode to whose grid an output signal from a condenser microphone unit is inputted, and from whose plate a signal is outputted, a first emitter-follower circuit configured to receive a signal based on a plate output of the first electron tube and amplify a current, and a first feedback element configured to transmit a feedback signal from an emitter of a transistor configuring the first emitter-follower circuit to the grid of the first electron tube. And the impedance conversion circuit can achieve a wide dynamic range while using a voltage amplifier circuit with an electron tube at an initial stage.
Kabushiki Kaisha Audio-technica


 Emg home trainer patent thumbnailEmg home trainer
A system for the detection, recording, and analysis of emg data attained during exercise in real-time is described. The system employs a surface emg sensor equipped with a bluetooth or a wi-fi module.

 Low power amplifier patent thumbnailLow power amplifier
A phase-locked loop (pll) circuit, sense amplifier circuit, and method of operating a sense amplifier circuit are disclosed. The sense amplifier circuit comprises first and second operational amplifiers, each operational amplifier respectively comprising a non-inverting input terminal, an inverting input terminal, and an output stage comprising a current gating circuit having two current gating input terminals, the output stage coupled with an output terminal, the output terminal providing a feedback signal to the inverting input terminal.
International Business Machines Corporation


 Amplifier circuit and method patent thumbnailAmplifier circuit and method
An amplifier arrangement comprises n amplifier stages 101 to 10n, wherein n is an integer equal or greater than five. The amplifier arrangement comprises a cascade of quarter wavelength transmission line segments 111 to 11m coupled between an output of an amplifier of a first amplifier stage and an output node 15 of the amplifier arrangement.
Telefonaktiebolaget Lm Ericsson (publ)


Amplifier circuits

Amplifiers with noise splitting to improve noise figure are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, etc.) includes a plurality of amplifier circuits and at least one interconnection circuit.
Qualcomm Incorporated

Apparatus for compensation of electronic circuitry and associated methods

An apparatus includes a multi-stage amplifier. The multi-stage amplifier includes first, second, and third amplifier circuits coupled in a cascade configuration.
Silicon Laboratories Inc.

Sense amplifier

Embodiments include a sense amplifier circuit including first and second paths that may be selectively coupled to a memory cell or a reference cell as part of a two-phase read process. The sense amplifier may include a biasing circuit to provide an adaptive bias voltage to a transistor of the first and/or second path to cause the transistor to provide a voltage across the memory cell and/or reference cell that is substantially constant across process corners.
Intel Ip Corporation

Voltage regulator

The voltage regulator includes a reference voltage circuit configured to feed back the reference voltage as a feedback voltage and to output the reference voltage, a soft-start circuit configured to output a control signal for controlling the reference voltage to rise linearly at a start of power supply, a voltage divider circuit configured to output a divided voltage, an error amplifier circuit configured to amplify and output a difference between the reference voltage and the divided voltage, and an output transistor controlled by an output voltage of the error amplifier circuit. The reference voltage circuit includes an analog switch transistor having a gate controlled by the control signal, and the feedback voltage is an output voltage from the analog switch transistor..
Sii Semiconductor Corporation

Modified current mirror circuit for reduction of switching time

A current mirror circuit connectible to an amplifier circuit to set a bias point thereof includes a current mirror circuit, and a bias resistor connected thereto. The bias resistor is connectible to the amplifier circuit.
Skyworks Solutions, Inc.

Preamplification system for an acoustic guitar or other music instrument with vibrating parts

A sound detection system of a musical instrument with vibrating parts includes at least a pair of sensors and a preamplification unit for processing the signal output from the two sensors along respective channels. At least one of the pair of sensors is a piezoelectric transducer and the other one of the pair of sensors is a different-type transducer.
Heart Sound Italy S.r.l.

Low noise capacitive sensor with integrated bandpass filter

A bandpass sense amplifier circuit (fig. 2a) is disclosed.
Texas Instruments Incorporated

A/d converter circuit, pipeline a/d converter, and wireless communication device

An a/d converter circuit has an amplifier circuit to amplify an input signal and output a first amplification signal and a second amplification signal, the second amplification signal having an amplification error smaller than that in the first amplification signal, a first sampling circuit to sample the first amplification signal, a first a/d converter to perform a/d conversion on the first amplification signal sampled by the first sampling circuit and output a first digital signal, a second sampling circuit to sample the second amplification signal, a d/a converter to perform d/a conversion on the first digital signal and output a first analog signal, a subtracter to subtract the first analog signal from the second amplification signal sampled by the second sampling circuit and output a second analog signal, and a second a/d converter to perform a/d conversion on the second analog signal and output a second digital signal.. .
Kabushiki Kaisha Toshiba

Sense amplifier circuits and methods of operation

A sense amplifier circuit includes a power node having a power node voltage at a power voltage level, a bit line having a bit line voltage, a sense amplifier output, an nmos transistor and a pmos transistor coupled in series between the power node and the bit line, and a logic gate configured to generate a sense amplifier output voltage at the sense amplifier output based on the bit line voltage. The nmos transistor is configured to operate in a sub-threshold region to maintain the bit line voltage at a first level and operate in a region above the sub-threshold region to maintain the bit line voltage at a second level, and the first level is between the second level and the power voltage level..
Taiwan Semiconductor Manufacturing Company, Ltd.

Method and system having a transimpedance amplifier circuit with a differential current monitoring device for monitoring optical receiver circuit (as amended)

A method for monitoring a circuit. The method may include obtaining, using a total current monitoring device, a measurement of a current transmitted through a cathode in a photodetector circuit.
Ciena Corporation

Low noise amplifier circuit

An amplifier for converting a single-ended input signal to a differential output signal. The amplifier comprises a first transistor, a second transistor, a third transistor and a fourth transistor.
Telefonaktiebolaget Lm Ericsson (publ)

Organic electroluminescent display device

An organic electroluminescent display device includes: a display unit in which pixels are arranged in rows and columns, the pixels each including an organic electroluminescent element, a drive transistor, and a capacitor; a power supply unit which generates a supply voltage; a gate drive unit which applies a reference supply voltage to the capacitor; and a control unit which carries the supply voltage from the power supply unit to the gate drive unit, wherein the gate drive unit includes a buffer amplifier circuit which suppresses a variable component of the supply voltage carried via the control unit to stabilize the reference supply voltage, and supplies the stabilized reference supply voltage to the pixel.. .
Joled Inc.

Active baseline signal cancellation in fingerprint sensors

In one aspect, a fingerprint sensor chip includes an array of senor pixels. At least one of the sensor pixels is designated as a reference sensor pixel and remaining sensor pixels in the array are designated to contribute to fingerprint data, the sensor chip includes a signal processing unit including amplifier circuitry to cancel out baseline signals from output signals of remaining sensor pixels based at least on an output signal of the reference sensor pixel..
Shenzhen Huiding Technology Co., Ltd.

Audio amplifier circuit having inputs for three audio channels

An audio amplifier circuit that is to receive three audio channel signals as inputs. A first amplifier has a first pair of outputs one of which produces a first combination sum of the three audio channel signals, and the other produces a second, different combination sum of the three audio channel signals.
Apple Inc.

Sense amplifier with offset compensation

An amplifier circuit is disclosed having an amplifier with first and second input terminals coupled to receive an input signal. A first compensation circuit is coupled to the first input terminal, and a second compensation circuit is coupled to the second input terminal.
Texas Instruments Incorporated

Apparatus, photodetection with a transimpedance amplifier of an eye-mountable device

Techniques and mechanisms to perform photodetection with an eye-mountable device. In an embodiment, the eye-mountable device includes an enclosure material and light sensor circuitry formed therein, the enclosure material to be disposed in or on an eye of a user.
Verily Life Sciences Llc

Imaging apparatus and imaging system

One imaging apparatus includes a first amplifier circuit, a second amplifier circuit, and a limiter circuit that limits the output of the first amplifier circuit, and further includes a configuration to clamp the output of the limiter circuit. Moreover, another imaging apparatus includes a fully differential amplifier circuit that outputs an amplified noise signal amplified from a noise signal, and an amplified optical signal amplified from an optical signal, and an output limiting circuit that limits each of the amplitude range of the amplified noise signal and the amplitude range the amplified optical signal..
Canon Kabushiki Kaisha

Out-of-band signal detection

An out-of-band (oob) signal detector is disclosed. The oob signal detector may include a first node configured to receive an alternating current (ac) portion and a direct current (dc) portion of an electrical signal.
Finisar Corporation

Power amplifier module

Improvement in linearity is achieved at low costs in a power amplifier module employing an envelope tracking system. The power amplifier module includes a first power amplifier circuit that amplifies a radio frequency signal and that outputs a first amplified signal, a second power amplifier circuit that amplifies the first amplified signal on the basis of a source voltage varying depending on amplitude of the radio frequency signal and that outputs a second amplified signal, and a matching circuit that includes first and second capacitors connected in series between the first and second power amplifier circuit and an inductor connected between a node between the first and second capacitors and a ground and that decreases a gain of the first power amplifier circuit as the source voltage of the second power amplifier circuit increases..
Murata Manufacturing Co., Ltd.

Enhanced switched capacitor filter (scf) compensation in dc-dc converters

A system, dc-dc converter, and compensation method and circuit for a dc-dc converter are disclosed. For example, a compensation circuit for a dc-dc converter is disclosed.
Intersil Americas Llc

Feedback control device

A feedback control apparatus includes: a detector configured to detect an output value based on a controlled object; a p control circuit including a differential amplifier circuit and an analog circuit, the differential amplifier circuit being configured to receive a detection value of the detector and a target value, the analog circuit being configured to output a p control component vp to an output of the differential amplifier circuit; an i control unit configured to output an i control component vi by integrating a deviation of the detection value from the target value by digital processing; and a driver element configured to be driven based on the p control component vp from the p control circuit and the i control component vi from the i control unit to control the controlled object.. .
Shimadzu Corporation

Device and transmitting and detecting electromagnetic signal propagating through cranial sutures

The embodiments of present invention disclose a device and a method of transmitting and detecting electromagnetic signal propagating through cranial sutures. The device comprises: a positioning strap and a differential amplifier circuit, wherein, the positioning strap on the inside thereof is provided with several electrode pads; at least one of the several electrode pads functions as an emitter electrode pad, at least two of the several electrode pads function as two receiver electrode pads, which are connected to two input terminals of the differential amplifier circuit, respectively; all the electrode pads are arranged on the inside surface of the positioning strap, and the shape of distribution of the electrode pads on the positioning strap matches the shape of at least one cranial suture on a cranium of an object under examination when the strap is placed around.
Chong Qing Born-fuke Medical Equipment Co., Ltd

Circuits and devices related to multi-harmonic control of amplified signals

Circuits and devices related to multi-harmonic control of amplified signals. In some embodiments, an amplifier circuit assembly can include an amplifier configured to provide a signal at an output.
Skyworks Solutions, Inc.

Amplifier for modulating the amplitude of an rf signal

An amplifier for modulating the amplitude of an rf signal, the amplifier including: a plurality of amplifier circuits, each circuit being connected to a first power source, each circuit including a charge storage device and an output across which a potential difference supplied by the first power source can be applied; a switching arrangement for switching connections between the first power source, the charge storage device, and the output in each amplifier circuit, wherein each circuit includes a first switched configuration in which the charge storage device is charged by the first power source and a second switched configuration in which the charge storage device, once charged, will apply an additional potential difference across the output. The amplifier is configured to vary the amplitude of the rf signal in proportion to the sum of the potential differences applied across the output in each amplifier circuit..
Kabushiki Kaisha Toshiba

Systems and methods related to linear and efficient broadband power amplifiers

Systems and methods related to linear and efficient broadband power amplifiers are disclosed. In some embodiments, a method for amplifying a radio-frequency signal includes providing a doherty amplifier circuit having a carrier amplification path and a peaking amplification path.
Skyworks Solutions, Inc.

Operational amplifier circuit and bias current supply method

Bias current is supplied to a first differential pair and a second differential pair from a first transistor being a single current source. Bias current is supplied to a third differential pair and a fourth differential pair from a second transistor being a single current source.
Mitsubishi Electric Corporation

High fidelity blast hearing protection

An improved hearing protection device intended to be inserted into an external auditory meatus of a user, having a housing structure, a passive tuning element, and a passive, nonlinear acoustic filter. The tuning element and the acoustic filter may be supported in series by the housing structure.
Applied Research Associates, Inc.

Secondary cell state detector

A condenser is connected to both electrodes of a secondary cell. A first switch is provided between a positive electrode of the secondary cell and a one-side plate of the condenser.
Yazaki Corporation

Secondary cell state detector

One-side plates of first and second condensers are connected to a one-side electrode of one of a plurality of secondary cells. First switches connect the other-side electrode of the secondary cell to the other-side plate of one of the first condenser and the second condenser.
Yazaki Corporation

Operational amplifying circuit and liquid crystal panel drive device using the same

An operational amplifier circuit includes: a first differential amplifier section containing a p-type differential pair of p-type transistors; a second differential amplifier section containing an n-type differential pair of n-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of p-type transistors, and a second current mirror circuit of n-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the p-type transistors of the p-type differential pair and a positive side power supply voltage.
Renesas Electronics Corporation

Buffer amplifier circuit for enhancing the slew rate of an output signal and devices including the same

A buffer amplifier circuit includes a buffer amplifier including a first differential amplifier having a first active load and a second differential amplifier having a second active load and a feedback circuit configured to feed an output signal of an output terminal of the buffer amplifier back to one of the first and second active loads using differential switch signals and an input signal of the buffer amplifier to enhance a slew rate of the output signal.. .
Samsung Electronics Co., Ltd.

Multi-stage amplifiers with low loss

An amplifier circuit (100) comprises three amplifier subcircuits (121,131,141) connected via a network of transmission lines to a common node. A control circuit is configured to control the three amplifier subcircuits (121,131,141) to operate in first, second, and third operating modes, such that a first subcircuit (121) is active in the first, second, and third modes, a second sub-circuit (141) is inactive in the first mode but active in the second and third modes, and a third subcircuit (131) is inactive in the first and second modes but active in the third.
Telefonaktiebolaget Lm Ericsson (publ)

Battery short-circuit protection circuit

This invention involves a battery short-circuit protection circuit installed in a battery-load circuit. In the battery-load circuit, there is a battery and a load rl.
Hefei University Of Technology

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.
Cirrus Logic International Semiconductor Ltd.

Process-compensated hbt power amplifier bias circuits and methods

The present disclosure relates to a system for biasing a power amplifier. The system can include a first die that includes a power amplifier circuit and a passive component having an electrical property that depends on one or more conditions of the first die.
Skyworks Solutions, Inc.



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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    This listing is a sample listing of patent applications related to Amplifier Circuit for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Amplifier Circuit with additional patents listed. Browse our RSS directory or Search for other possible listings.


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