Nonlinear control of loudspeaker systems with current source amplifier

Variable output resistance in a playback path with closed-loop pulse-width modulation driver

Variable output resistance in a playback path with open-loop pulse-width modulation driver

Multi-phase power converter system using multiple amplifier integrated circuits

Audio signal muting apparatus, and digital signal conversion apparatus equipped with same

Gain control in a class-D open-loop amplifier

Class-D dynamic closed loop feedback amplifier

AMPLIFIER WITH A SYMMETRIC CURRENT PROFILE

Temperature adaptive audio amplifier device and control method thereof

Control of switches in a variable impedance element

Self-boosting amplifier

Musical beat detection system and method for lighting control

Electronic unit and method of making the same

Signal amplifier

Dynamically adjusting common mode rejection ratio

Microphone assembly with reduced noise

Amplifier with local feedback loop

Method of operating Digital-to-Analog processing chains, corresponding device, apparatus and computer program product

Semiconductor integrated circuit

Differential circuit calibration apparatus and method

Class D amplifiers

MEMS sensor

Power control based on packet type

Determination of environmental effects on electrical load devices

Dual-mode acoustic radiator speaker system

Amplification systems and methods with one or more channels

Goods processing apparatus

Analog microphone and control method thereof technical field of the disclosure

Interface electronic circuit for a microelectromechanical acoustic transducer and corresponding method

Inductive distortion system and method

Multiphase buck-boost amplifier

Guitar amplifier system and method

Charge pump for scaling the highest of multiple voltages when at least one of the multiple voltages varies

Vacuum tube rear device

BATTERY POWERED POE AUDIO AMPLIFIER AND DEVICE

Single knob pre-amplifier gain-trim and fader

Power device structure with improved reliability and efficiency

Audio amplifier, audio output device including the same, and electronic apparatus

Microphone array

Digital amplifier and output device

Amplifier circuit arrangement and method to calibrate the same

Quaternary/ternary modulation selecting circuit and associated method

Dynamic fire system having a flow control apparatus for generating a control signal based on an audio signal

System and method for control of an analog device

Amplifier output stage using toroidal transformer

Calibration method for hearing protection devices

Audio signal reproduction apparatus and control method

Increased audio power output amplifier configuration including fault tolerance suitable for use in alarm systems

Audio amplifier assemblies, processes, and methods

Sound output circuit, projector, and control method of sound output circuit

Controlling parameters of an amplifier system based on a measured physical quantity

Zero-latency pulse density modulation interface with format detection

Minimizing phase mismatch and offset sensitivity in a dual-path system

Systems, devices, and methods for converting artwork or photographs into audio-enhanced exhibits

Hearing instrument comprising switched capacitor DC-DC converter

Audio system including speakers with integrated amplifier and method of detecting speakers

Integrated circuit and related audio amplifier

Power amplifier

Electronic converter, related audio system, integrated circuit and method of operating an electronic converter

Circuit and musical instrument

Multi-level class D audio power amplifiers

Dual device semiconductor structures with shared drain

Digital Microphone with a Dynamic Gain Scaling System

Semiconductor device and manufacturing method thereof

In-wall amplifier and controller housing and related methods

Class D amplifier

Audio power source with improved efficiency

Methods and apparatus for volume adjustment

Audio power source with improved efficiency

SWITCHED-MODE AUDIO AMPLIFIER EMPLOYING POWER-SUPPLY AUDIO-MODULATION

Audio power source with improved efficiency

MEMS capacitive sensor

Amplifying device comprising a compensation circuit

Electronic device, and method for reducing noise of voice signal by utilizing same

AMP SYSTEM FOR VEHICLE USING BLUETOOTH MODULE

Load-adaptive class-G amplifier for low-power audio applications

Short-circuit protection apparatus and method

Amplifying device

Microphone system

Amplifier circuit, corresponding system and device

Musical beat detection system and method for lighting control

EXCURSION CONTROL BASED ON AN AUDIO SIGNAL BANDWIDTH ESTIMATE OBTAINED FROM BACK-EMF ANALYSIS

Amplifiers

SOUND REPRODUCTION DEVICE

Class-D amplifier with duty cycle control

Submersible audio amplifier

Low power dissipation high performance Class-D amplifier

OUTPUT CIRCUIT OF AMPLIFIER

On-chip resistor divider compensation with a 2VRMS input

Class-D amplifier with multiple independent output stages

Closed-loop digital compensation scheme

Temperature detecting and controlling integration device and the temperature controlling method applied for micro speaker

HIGH AND LOW VOLTAGE LIMITED POWER AMPLIFICATION SYSTEM

Circuit having high-pass filter with variable corner frequency

Boost control signal generator

Load detector

Pulse width modulation circuit, corresponding device and method

Methods and circuits to reduce pop noise in an audio device

Amplifier speaker drive current sense

Calibration of a dual-path pulse width modulation system

Switching power supply and amplification device

Thermal model based estimator

Pulse-width modulation

Sensor with movable part and biasing

High end audio preamplifier

Power supply circuit and sound equipment

Distributed and upgradable audio system

Digital audio converter and amplifier controller

Receiver and noise squelch control method

Amplifier circuit, corresponding system and device

Audio control system and related methods

Audio control system and related methods

Direct current mode digital-to-analog converter to class D amplifier

System and method for low distortion capacitive signal source amplifier

Hybrid Power Supply Unit For Audio Amplifier

Class-D amplifier and audio playback apparatus

Power management system for battery-powered audio device

Brownout response

Plural feedback loops instrumentation folded cascode amplifier

Amplifier circuit for amplifying an output signal of a capacitive sensor

Transducer driver circuitry

Class D audio amplifier with overload protection circuit

Circuit for generating a plurality of reference voltages for controlling feedback within the circuit

High efficiency transducer driver

ADAPTIVE-SNR ULTRA-LOW-POWER ULTRA-LOW-NOISE MICROPHONE

Self-oscillating amplifier system

Music reproducing device

Audio device and control method for an audio device

Dynamic limiting when driving high capacitive loads

Protective device

Total harmonic distortion (THD) controlled clip detector and automatic gain limiter (AGL)

Reducing audio artifacts in an amplifier during changes in power states

Ground switching for speaker current sense

Audio amplifiers

Audio amplifiers

High efficiency transducer driver

ELECTRONIC SIGNAL PROCESSOR

Amplifier error current based on multiple integrators

Class-H switching amplifier circuit having supply voltage proportional to an audio signal

DIGITALLY CALIBRATED AMPLIFIER HAVING AN ALTERNATIVE OUTPUT SIGNAL PATH

Method and apparatus to increase audio band microphone sensitivity

Microelectromechanical systems (MEMS) microphone bias voltage

System and method for signal read-out using source follower feedback

Class D audio amplifier with adjustable gate drive

Loudspeaker enhancement

Audio control system and related methods

Single knob pre-amplifier gain-trim and fader

Audio amplifier power supply rail-balancing and anti-pumping system

Audio control system and related methods

Controlling noise transfer function of signal path to reduce charge pump noise

Control of switches in a variable impedance element

Managing a shoot-through condition in a component containing a push-pull output stage

Multi-path power amplifier

Preamplifier for musical instruments

Switching in an audio system with multiple playback paths

Audio output circuit and audio device

Correction of current measurement in an amplifier

Controlling a power amplification stage of an audio signal amplifier

Signal amplifier

Phantom powered preamp converter

Amplifier, audio signal output method, and electronic device

System, apparatus and methods for musical instrument amplifier

Circuit for inhibiting single-ended analogue signal noise, and terminal attachment

MEMS transducer amplifiers

Integrated circuit, circuit assembly and a method for its operation

Portable speaker system for electric string instruments

Integrated circuit, circuit assembly and a method for its operation

Digital PWM modulator

Seismocardiography

Amplifiers

Operational amplifier, corresponding circuit, apparatus and method

Class-D amplifier

Method for load measurement in switching amplifiers, corresponding device and amplifier

Audio amplifier and audio power amplifier

Charge pump with current mode output power throttling

Boosted amplifier with current limiting

High-efficiency amplifying device and method for controlling power supply thereof

Method and device for the contactless energy transfer to an apparatus equipped with a loudspeaker

Acoustic Power Coupling for Mobile Audio Devices

Class D amplifier

Closed-loop digital compensation scheme

Offset calibration for amplifier and preceding circuit

AN ULTRA-LOW-POWER ULTRA-LOW-NOISE MICROPHONE

Method for limiting amplifier input current to avoid low voltage conditions

Amplifiers with delta-sigma modulators using pulse-density modulations and related processes

Systems and methods for predictive switching in audio amplifiers

Preamplifier and method

Amplifier with auxiliary path for maximizing power supply rejection ratio

Class-D amplifier with post filter feedback loop

Total harmonic distortion (THD) controlled clip detector and automatic gain limiter (AGL)

Amplifier module and control method thereof

Electronic circuit for a microphone and microphone

Direct current mode digital-to-analog converter to class D amplifier

Multi-level class D amplifier

Circuit for providing a high and a low impedance and a system comprising the circuit

Transducer with a high sensitivity

Output stage circuit

Linear resonant actuator controller

Differential amplifier circuit for a capacitive acoustic transducer and corresponding capacitive acoustic transducer

Class-D power amplifier nested inside low-noise differential op-amp feedback loop

System and method for signal read-out using source follower feedback

Hearing instrument comprising switched capacitor DC-DC converter

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

Amplifier circuit with reduced feedforward current

Amplifiers

ADAPTIVE TRACKING RAIL AUDIO AMPLIFIER

Amplifier device

Analog-to-digital converters and methods

Charge pump input current limiter

PWM modulator

Class-D amplifier circuit

Amplifier

Fully-differential operational amplifier system

Duty cycle clipper

Signal amplifier

Integrated circuit arrangement for a microphone, microphone system and method for adjusting one or more circuit parameters of the microphone system

Gain calibration controller

Direct current mode digital-to-analog converter to class D amplifier

Brownout response

Amplifier speaker drive current sense

Solid state switch relay

Minimizing startup transients in an audio playback path

Method for limiting amplifier input current to avoid low voltage conditions

Low-power conversion between analog and digital signals using adjustable feedback filter

Multi-level class D audio power amplifiers

Load detector

High current low-cost DC coupled DAC follower low pass filter headphone amplifier

Portable speaker system for electric string instruments

MULTIDRIVER BASED CANALPHONE SYSTEM

Switchless line-DI/Mic pre-amplifier input

Pre-amplifier circuit including microphone pre-amplifier stage

Method for load measurement in switching amplifiers, corresponding device and amplifier

Multi-phase power converter system using multiple amplifier integrated circuits

Startup pop minimization

Multiple output boost DC-DC power converter

Amplifier Structure

Self-oscillating amplifier with high order loop filter

Load adaptable boost DC-DC power converter

Multi-standard, automatic impedance controlled driver with supply regulation

System and method for a high-ohmic resistor

Microelectromechanical systems (MEMS) microphone bias voltage

Portable miniature amplifier and speaker for guitar

System and method for close-down pop reduction

Amplifiers

Systems and methods for predictive switching in audio amplifiers

Class D amplifier

Audio amplifier system

DC offset compensation

BTL OUTPUT SELF-OSCILLATING CLASS D AMPLIFIER

Self-oscillating class D amplifier

Audio signal amplification device, power supply device, and power supply control method

Amplifier circuit for improved sound

Estimating voltage on speaker terminals driven by a class-D amplifier

Generation of voltage reference signals in a hybrid switched mode amplifier

Dual device semiconductor structures with shared drain

Input stage of an amplifier and corresponding amplifier

Charge pump-based split-rail supply generation

Clamping audio signal paths

Controlling a power amplification stage of an audio signal amplifier

Audio amplifiers

Dynamic volume management in audio amplifiers

DYNAMIC DEAD TIME MANAGEMENT

Direct current (DC) and/or alternating current (AC) load detection for audio codec

Microphone biasing circuitry and method thereof

System and method for signal read-out using source follower feedback

Class D switching amplifier and method of controlling a loudspeaker

System and method for acoustic transducer supply

Self-biasing output booster amplifier and use thereof

Audio amplifier

Switched mode converter with variable common mode voltage buffer

Very high fidelity audio amplifier

Circuit and musical instrument

Adaptive tracking rail audio amplifier

Differential amplifier circuit for a capacitive acoustic transducer and corresponding capacitive acoustic transducer

Amplification systems and methods with output regulation

Audio system having an improved efficiency and extended operation time

Impedance converter and condenser microphone

Power stage with switched mode amplifier and linear amplifier

Mitigating amplifier pop noise

Electronic signal processor

Method of operating digital-to-analog processing chains, corresponding device, apparatus and computer program product

Class D audio amplifier and method for reading a current supplied by the amplifier

Amplifier arrangement and amplification method

Class-D amplifier, audio processing apparatus and method of driving class-D amplifier

Speaker driver

Host interface, accessory interface and method for managing a connection between a host interface and an accessory device

Inductive distortion system and method

Portable Amplification Unit

Method and apparatus for achieving high-output signal swing from class-D amplifier

Apparatus, method, system and computer program for amplifying an audio signal

Audio amplifier using multi-level pulse width modulation

Audio circuit

Method and apparatus for achieving very high-output signal swing from class-D amplifier

Method and apparatus for maintaining DC bias

Battery powered PoE audio amplifier and device

Method and apparatus for achieving very high-output signal swing from class-D amplifier using fewer components

On-chip resistor divider compensation with a 2VRMS input

Audio interface circuits and methods

Multi-Channel Noise Reduction System with Direct Instrument Tracking

Sensor with movable parts and biasing