Class-D amplifier

BOOST DROOP CATCHER

DIFFERENTIAL HYBRID SUPPLY GENERATOR AND SUPPLY MODULATOR WITH CHARGE REGULATION

DOHERTY AMPLIFIER WITH ADAPTIVE BIASING

REDUCTION OF CLICK AND POP NOISE IN AN AMPLIFIER

JUMP-START POWER AMPLIFIER BOOST CONVERTER

Radio-frequency Amplifier with Reliability Protection

POWER AMPLIFYING CIRCUIT

INTEGRATED CIRCUIT, ASSOCIATED START-UP CIRCUIT AND START-UP METHOD THEREOF

ACTIVE CURRENT COMPENSATION DEVICE CAPABLE OF DETECTING MALFUNCTION

HIGH-FREQUENCY POWER SUPPLY

Active current compensation device capable of detecting malfunction

Switching audio amplifier with improved voltage supply control

Jump-start power amplifier boost converter

Method and device for eliminating unstable noise

Active current compensation device capable of detecting malfunction

High voltage switch with fast turn-off

Dynamic suppression of pop and click noise in an audio driver

Amplifier-embedded video surveillance IP speaker system

Power amplifier module

Fast ramping power amplifier boost converter

Jump-start power amplifier boost converter

Three level PWM class D amplifier

Bias circuit and amplifying device with bias compensation function

Audio device for reducing pop noise and processing method thereof

Bias circuit and power amplifier for improving linearity

POWER SUPPLY FOR CLASS G AMPLIFIER

Circuitry and method for GaN device

Methods and circuits to reduce pop noise in an audio device

Power amplifier with supply switching

Reducing audio artifacts in an amplifier during changes in power states

Operational amplifier, corresponding circuit, apparatus and method

Semiconductor integrated circuit, semiconductor system, and electric source voltage control method

Power supply for class G amplifier

Method of switching on and off a power amplifier, related power amplifier circuit, system and computer program product

Output stage circuit

Power amplifier with supply switching

Startup pop minimization

Envelope tracking power management circuit

RF class AB cascode amplifier with linearization and steering diodes

Load adaptable boost DC-DC power converter

System and method for close-down pop reduction

Systems and methods for predictive switching in audio amplifiers

Mitigating amplifier pop noise

Methods and circuits to reduce pop noise in an audio device

Apparatus and methods for capacitive load reduction in a mobile device

Power supplies

Class-D audio amplifier

Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator

Off-state isolation enhancement for feedback amplifiers

Nonlinear power supply ramping for pop-click noise reduction

Pop and click noise reduction

Methods and circuits to reduce pop noise in an audio device

Amplifier with adjustable ramp up/down gain for minimizing or eliminating pop noise

Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator

Apparatus and methods for capacitive load reduction of an envelope tracker

Circuit for reducing pop noise

Startup circuit, capacitive sensor amplification device having startup circuit, and startup method for amplification device

Amplifier apparatus and soft-start method thereof

Multi mode bias modulator operating in envelope tracking mode or average power tracking mode and envelope tracking power amplifier using the same

Circuit for suppressing audio output noise and audio output circuit

Audio amplifier and power supply voltage switching method

Pop-click noise grounding switch design with deep sub-micron CMOS technology

Amplifier with improved noise reduction

Negative audio signal voltage protection circuit and method for audio ground circuits

Amplifier device and method for activating an amplifier device or the amplifier unit

Audio amplifier mode transition

Power amplifier system with supply modulation mitigation circuitry and methods

Integrated start-up bias boost for dynamic error vector magnitude enhancement

Power amplifier controller

Pop/click noise reduction circuitry for power-up and power-down of audio output circuitry

POP noise suppression circuit and system

Speaker control system

Control of a switched mode power supply and linear power supply for an audio device

Pop-free single-ended output class-D amplifier

Grounding switch method and apparatus

Integrated start-up bias boost for dynamic error vector magnitude enhancement

Integrated start-up bias boost for dynamic error vector magnitude enhancement

Audio amplifier apparatus

Vehicle proximity annunciator device

MUTE DRIVE CIRCUIT

Amplifying circuits and calibration methods therefor

Modified switching ripple for envelope tracking system

Waveform shaping for audio amplifiers

Transient signal suppression for a class-D audio amplifier arrangement

Multimode multiband wireless device with broadband power amplifier

Audio-output amplifier circuit for audio device, audio device, electronic device including audio device, and output control method for audio device

Power management controller for drivers

Power amplifier

Pop and click noise reduction

POP noise suppressing circuit and its method

Amplifier with improved noise reduction

Apparatus and method for a smooth powerup of a reference signal

Multi-tier power supply for audio amplifiers

Amplifier with start-up common mode feedback

FEEDFORWARD ACTIVE DECOUPLING

Method of powering down an audio amplifier with timing circuit to power down bias control and amplifying circuits in sequence

Pop-up noise reduction in a device

Automated noise reduction circuit

Amplifier activation

Calibration of signal processing apparatus

Modified dynamic load scaling (MDLS) technique for implementing high efficiency low power mode operation

Circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system

Audio amplifying circuit with improved noise performance

Apparatus and methods for capacitive load reduction

Amplifier with reduced on/off transient and multi-point offset compensation

Offset cancellation for audio amplifier

Pop sound reduction circuit and audio circuit having such pop reduction circuit for use in audio amplifier

Implementing a piecewise-polynomial-continuous function in a translinear circuit

Anti-glitch system for audio amplifier

Signal amplifier, bridge connection signal amplifier signal output device, latch-up prevention method, and program storage medium

Anti-pop circuit

Electronic circuit for driving a switching amplifier

Apparatus and method for a smooth powerup of a reference signal

Mute control circuit and electronic device using same

AMPLIFIER CIRCUIT

Grounding switch method and apparatus

Bi-directional and adjustable current source

De-pop circuit and an associated audio system

FAST START-UP CIRCUIT FOR AUDIO DRIVER

Duplicate feedback network in class D amplifiers

Amplifier with reduced output transients and method therefor

AUDIO APPARATUS

Amplifier circuit and method therefor

Systems and methods for offset cancellation method for DC-coupled audio drivers

Plop-free amplifier

High perceived audio quality class D amplifier

Switched active bias control and power-on sequencing circuit for an amplifier

Active bias control circuit for an amplifier and method of power up sequencing the same

Output circuit for audio codec chip

AUDIO OUTPUT DEVICES

Amplifier circuit

Quiet power up and power down of closed loop digital PWM modulators

DOUBLE INTEGRAL METHOD OF POWERING UP OR DOWN A SPEAKER

Anti-pop circuit

Circuit and method for reducing popping sound

Digital signal converter

Systems and methods to minimize startup transients in class-D amplifiers

Circuits and methods for reducing pop noise in class D amplifiers

Amplifying system and related method

Bi-directional and adjustable current source

Closed loop ramp up for pop and click reduction in an amplifier

Anti-pop method and apparatus for class AB amplifiers

Power management controller for drivers

Audio output apparatus capable of suppressing pop noise

Amplifier circuit and method therefor

Amplification circuit and method therefor

LARGE RC TIME-CONSTANT GENERATION FOR AUDIO AMPLIFIERS

METHOD AND APPARATUS FOR OPERATION SEQUENCING OF AUDIO AMPLIFIERS

Signal processor comprising a reference voltage circuit

Audio device and audio input/output method

Amplifier circuit

Extra power stage added for pop elimination

Anti-pop circuits and methods for audio amplifiers using variable resistors

AUDIO OUTPUT APPARATUS CAPABLE OF SUPPRESSING POP NOISE

Amplification circuit for driving a diffuser

Audio reproducing apparatus

Audio amplifier with timing circuit to power down bias control and amplifying circuits in sequence

AUDIO AMPLIFIER

Prevention of audio pop in a digital audio device

AUDIO AMPLIFIER

Pop noise eliminating circuit that disables an audio output device when turning the device on

Class D audio amplifier

Pop noise suppression apparatus and audio output system utilizing the same

Preset circuit of audio power amplifier

Muting control device, muting control method, and muting control program

System and method of reducing click and pop noise in audio playback devices

Device, system, and method of providing biasing power

Audio amplifier

AUDIO SIGNAL AMPLIFIER CIRCUIT WITH A MUTE FUNCTION

Audio output device and method

Systems and methods to minimize startup transients in class D amplifiers

CIRCUIT AND METHOD FOR ELIMINATING SPEAKER CRACKLE DURING TURNING ON OR OFF POWER AMPLIFIER

Audio Amplifier with Reduced Noises

Voltage control circuit

Semiconductor integrated circuit and amplifier for suppressing pop sound while minimizing voltage transition settling time

Circuits and apparatus to reduce transient output noise in an audio amplifier

Circuit for eliminating pop sounds at power on and off by a moderate waveform

System and method for minimizing DC offset in outputs of audio power amplifiers

Audio system with power-on/off noise suppression and audio amplifier thereof

Amplifier apparatus and method

AUDIO SIGNAL OUTPUT CIRCUIT CAPABLE OF DECREASING POP NOISE

Apparatus and muting circuit

AUDIO DEVICE PROTECTION SYSTEM

Noise reduction system and method for audio switching amplifier

Circuit arrangement for suppression of switching noises

Circuit and method of reducing pop-up noise in a digital amplifier

Amplifier apparatus and method

Amplifier apparatus and method

Amplifier apparatus and method

DEVICE FOR PREVENTING POP NOISE IN AN AUDIO OUTPUT APPARATUS AND METHOD THEREFOR

Differential input Class D amplifier

Startup and shutdown click noise elimination for class D amplifier

Switching audio power amplifier and method for pop noise suppression

Amplifier circuits, methods of starting and stopping amplifier circuits

Fast charge circuit for use in amplifiers

Anti-pop circuit

Constant voltage generating circuit

System and method for reducing click using signal averaging on a high order modulator output

System and method to reduce audio artifacts from an audio signal by reducing the order of the control loop

Plop noise avoidance for an amplifier

Audio amplifier and methods for use therewith

System and method for minimizing DC offset in outputs of audio power amplifiers

Circuit for suppressing audio noise

Mute circuit for eliminating noise during power off and electronic device using the same

CLASS D AMPLIFIER WITH START-UP CLICK NOISE ELIMINATION

Quiet power up and power down of a digital audio amplifier

Electronic apparatus having audio output units

Audio signal output control device that suppresses pop sound

Amplifying circuit

Audio output driver and methods for use therewith

Power conversion system

Soft-start circuit and method for power-up of an amplifier circuit

Charging circuit and control method and integrated circuit utilizing the same

Elimination of pop-up noise in class D amplifier

Charge/discharge control circuit for audio device

Automute detection in digital audio amplifiers

Reduction of audible artifacts in an audio system

Digital amplifier, pulse width modulator thereof and method for reducing pop noise for the same

System and method for reducing audible artifacts in an audio system

ANTI-POP DEVICE FOR AUDIO AMPLIFIERS

Circuit for preventing output of pop noise

Apparatus and method for limiting voltage surge at amplifier start up

Amplifier with sample and hold output and low drive stage

Multi-stage amplifiers to reduce pop noise

Intelligent RF power control for wireless modem devices

Circuit and method for eliminating pop noise in digital audio amplifier using dual power supply

Driver circuit with gradual voltage ramp up and ramp down

Circuit and method for providing an auto-off and/or auto-on capability for an audio device

Apparatus and method for controlling output signals from an amplifier when changing state

Apparatus and method for controlling output signals from an amplifier when changing state

Amplifier circuit with reduced power-off transients and method thereof

Method and apparatus for compensating for phase variations caused by activation of an amplifier

Low-noise, fast-settling bias circuit and method

Fully differential amplifier with start up circuit

Method and system for reducing pop noise of a sound broadcasting instrument

Amplifier circuit for capacitive transducers

Gate control circuit with soft start/stop function

Supplying a ramp voltage to an amplifier

MUTE CIRCUIT OF AN AUDIO DEVICE FOR SUPPRESSING AUDIO SIGNALS DURING TRANSIENTS OF POWER SWITCHING

System, circuit, and amplifier for reducing pop sound

Method and apparatus for resetting a buffer amplifier

Linear voltage tracking amplifier for negative supply slew rate control

Pop and click reduction using DAC power up and power down processing

Audio system

Fast settling bias circuit

Multimode multiband wireless device with broadband power amplifier