Transmitter and communication apparatus

Pulse width modulation for switching amplifier

Method and apparatus for outputting audio signal

Pulse width modulation signal generating circuit and amplifier circuit with beat frequency cancellation circuit

Audio mixing device, method thereof, and electronic device

Power amplifier, wireless communication device, and power amplification method

Switching power supply device and a semiconductor integrated circuit

Apparatus and method for switching audio amplification

DYNAMIC CONSTANT POWER AMPLIFIER

Mixed-signal transmission circuit for switching power amplifiers

Multiple-input comparator and power converter

Method for adjusting the maximum output power of a valve power amplifier stage for an audio amplifier, and corresponding valve power amplifier stage

Audio amplifier with closed-loop power

Output circuits with class D amplifier

Decomposer and amplifier

Output circuits with class D amplifier

Power amplifier and bridge circuit in power amplifier

Method and apparatus for amplifying audio signal

Digital to-analog converter

Power amplifier

Amplifier arrangement and method for signal amplification

Dynamic constant power amplifier

Switching power supply device and semiconductor integrated circuit

Method and control circuit for controlling pulse width modulation

Self oscillating class D amplification device

Modulated Triangular Wave Amplifier

Drive circuit to adjust a luminance of a light emitting element based on a PWM signal, and a portable information terminal including the drive circuit

Transmitter utilizing a duty cycle envelope reduction and restoration modulator

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

Transmitter with reduced power consumption and increased linearity

Method and apparatus for controlling power supply of audio amplifier

Power amplifier

Digital signal converter

PWM AMPLIFIER

Transmitter comprising a pulse width pulse position modulator and method thereof

Class D amplifier circuit

Apparatus for sensorless positioning with signal amplifier

Pulse width modulation circuit and class-D amplifier comprising the PWM circuit

Power amplifier architectures

Method of and circuit for adjusting frequency of a driving signal of electronic horn by means of capacitor

Switched modulation of a radio-frequency amplifier

Error correction system for a class-D power stage

Minimum pulse generation in a class-D amplifier

STAGED LINEAR CONVERSION METHOD

Digital adaptive feedforward harmonic distortion compensation for digitally controlled power stage

HIGH-MODE SELF-OSCILLATING PULSE MODULATOR

Class-D amplifier

Data processing system for clipping correction

Pulse width modulator

Power amplifier

Switching power amplifier and method of controlling the same

Class D audio amplifier

Transformer-capacitor enhancement circuitry for power amplifiers

Power amplifier architectures

Amplification circuit for driving a diffuser

Precision triangle waveform generator

Power supply providing ultrafast modulation of output voltage

Reduction of power consumption and EMI of a switching amplifier

Class D audio amplifier

Output DC offset protection for class D amplifiers

Apparatus and method for bias modulator using zero current switching

Signal generating apparatus and related method

Apparatus and method for amplifying signal power in a communication system

Switching power supply device and semiconductor integrated circuit

Over-current sensing during narrow gate drive operation of class D output stages

CONTROLLER FOR A POWER SUPPLY

Apparatus for power amplification based on envelope elimination and restoration (EER) and push-pull switching

Amplifier modulation method and apparatus

Class D amplifier

Class D amplifier

LOW DISTORTION CLASS-D AMPLIFIER

Drive circuit supplying current to load based on control signal, and portable information terminal including the same

Class D amplifier with increased efficiency

System for amplifiers with low distortion and low output impedance

Class D amplifier circuit

AMPLIFIER

Power amplifier with noise shaping function

Pulse width modulator using interpolator

Multi-mode audio amplifiers

Multibit digital amplifier for radio-frequency transmission

Audio system for improving a signal to noise ratio

Solid state tesla coil suit

System and method for forming and controlling electric arcs

Output circuits with class D amplifier

System and method for controlling an electromagnetic field generator

Pulse width modulator system

Systems and methods for correcting errors resulting from component mismatch in a feedback path

Capacitive load driving device

Filterless class-D speaker driver with less switching

Suppression of high-frequency perturbations in pulse-width modulation

Discrete dithered frequency pulse width modulation

Power-MOSFETs with improved efficiency for multi-channel class-D audio amplifiers and packaging thereof

Digital audio amplifier and digital audio amplifying method therefor

Digital input class-D amplifier

Multi-Channel Pulse Modulator System

Class-D Amplifier

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

Power amplifier

Modulated triangular wave amplifier

Multi-stage amplifier with multiple sets of fixed and variable voltage rails

Low distortion switching amplifier circuits and methods

Low distortion switching amplifier circuits and methods

Multi-mode amplitude modulator control method

Low distortion class-D amplifier

Digital amplifying apparatus with noise reduction

Control circuit and method for a switching amplifier

APPARATUS FOR PULSE WIDTH MODULATION AND METHOD FOR CONTROLLING THEREOF

Noise reduction system and method for audio switching amplifier

Digital pulse width modulation with variable period and error distribution

Power control and modulation of switched-mode power amplifiers with one or more stages

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

Audio amplifier capable of performing self-oscillation

Compensated gain control device

CONTROLLING AUDIO OUTPUT OF A MOBILE TERMINAL

Reduction of voltage spikes in switching half-bridge stages

Methods and system for detecting DC output levels in an audio system

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

Sigma-delta based Class D audio or servo amplifier with load noise shaping

Differential input Class D amplifier

Protected digital audio driver

MULTI-CHANNEL, MULTI-POWER CLASS D AMPLIFIER WITH REGULATED POWER SUPPLY

Class-D audio amplifier with half-swing pulse-width-modulation

Amplifier circuits, methods of starting and stopping amplifier circuits

Power supply apparatus, amplifier apparatus, radio apparatus and reproducing apparatus

Power amplifier circuit and method for envelope modulation of high frequency signal

Method of and apparatus to generate pulse width modulated signal from sampled digital signal by chaotic modulation

Circuit for reducing distortion of class D amplifier

Driving device and driving method

Apparatus and method for performing a calculation operation

Circuit and method for pulse width modulation by means of synchronized, self-oscillating pulse width modulators

High Linearity Modulation System and Modulation Method

Common-mode technique for a digital I/P class D loop

Signal Output Circuit, Audio Signal Output Apparatus Using The Same, And Electronic Device

Driving device

Apparatus and method for controlling temperature of electronic apparatus

Noise free implementation of PWM modulator combined with gate driver stage in a single die

Circuits and methods for amplifying signals

Audio power amplifier IC and audio system provided with the same

Digital amplifier and television receiving apparatus

Multi-mode class-D amplifiers

Prescaler and buffer

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

Class-E radio frequency power amplifier with feedback control

Class-E radio frequency amplifier for use with an implantable medical device

PWM digital amplifier with high-order loop filter

Device and method for pulse width modulation

Amplifier

Method and system for transmitter envelope delay calibration

PWM feedback/feed-forward protection

Systems and methods for minimizing delay in a control path

Pulse width modulation in digital power amplifier

Systems and methods for pulse width modulating asymmetric signal levels

Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signal

Switching power supply device and a semiconductor integrated circuit

Apparatus and method for importing content including plural pieces of usage constraint information

Power amplifier with low power distortion at output

Switching amplifier

Overcurrent detection circuit and switching circuit

Quiet power up and power down of a digital audio amplifier

CLASS D AMPLIFIER

Capacitive load driving circuit, electrostatic transducer, method of setting circuit constant, ultrasonic speaker, display device, and directional acoustic system

Signal processor for use with a power amplifier in a wireless circuit

Audio signal output control device that suppresses pop sound

System for dynamic time offsetting in interleaved power amplifiers

Method and arrangement for optimizing efficiency of a power amplifier

Power supply rejection for pulse width modulated amplifiers and automatic gain control

Power conversion system

Precision triangle waveform generator

Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same

Low-distortion tri-state switching amplifier

Low-distortion tri-state switching amplifier

Amplifier circuit

Method for correcting a harmonic distortion of a power bridge, in particular for a class D amplifier

Amplifier having a regulation system controlled by the output stage

Method and circuit for controlling a PWM power stage

Power control and modulation of switched-mode power amplifiers with one or more stages

System for amplifiers with low distortion and low output impedance

Apparatus and method to control audio volume in D class amplifier

Self oscillation system capable of eliminating interference

Low distortion class-D amplifier using carrier reference signal symmetry modulation

Method of estimating an intersection between at least two continuous signal representations

Feedback controller for PWM amplifier

Amplifier circuit having a compensating amplifier unit for improving loop gain and linearity

Elimination of pop-up noise in class D amplifier

Apparatus and method for effecting signal chopping in an amplifier device

Summing comparator for higher order class D amplifiers

Class-D amplifier system

Systems for pseudo-BD modulation

Power supply providing ultrafast modulation of output voltage

PWM digital amplifier with high-order loop filter

PWM digital amplifier with high-order loop filter

High voltage integrated circuit driver with a high voltage PMOS bootstrap diode emulator

Automute detection in digital audio amplifiers

DEVICE AND METHOD FOR SIGNAL PROCESSING

Reduction of audible artifacts in an audio system

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

Power control and modulation of switched-mode power amplifiers with one or more stages

Modulated triangular wave amplifier

Class D amplifier

Low-distortion tri-state switching amplifier

Pulse-width modulation circuits of self-oscillation type and pulse-width modulation methods

Amplifier fault detection circuit

Multi-channel, multi-power class D amplifier with regulated power supply

PWM DIGITAL AMPLIFIER WITH HIGH-ORDER LOOP FILTER

PWM digital amplifier with high-order loop filter

Variable bandwidth envelope modulator for use with envelope elimination and restoration transmitter architecture and method

Polar modulator and a method for modulation of a signal

PWM digital amplifier with high-order loop filter

PWM digital amplifier with high-order loop filter

Method of establishing a PWM-modulated output signal representation

High performance, high efficiency fiber optic link for analog and RF systems

Digital differential amplification control device

Digital amplifier

Digital amplifier

D-class audio power amplifier and method thereof

Power multiplier system and method

Frequency stabilization technique for self oscillating modulator

Amplifier apparatus

Sonar transmitter

Synchronous delay-line amplification technique

Current controlled pulse width modulation circuit and class-D amplifier comprising the same

Pwm generator

PWM modulation circuit and class D amplifier using such PWM modulation circuit

Feedback circuit

Apparatus and method to limit current of an audio amplifier

Digital adaptive feedforward harmonic distortion compensation for digitally controlled power stage

Polar signal processor to drive a segmented power amplifier and method therefore

High voltage integrated circuit driver with a high voltage PMOS bootstrap diode emulator

Method for shaping signal pulses

Triangular wave generating circuit adapted to class-D amplifier

Transmit signal generator and method

System and method for identifying a signature of a device, in a communication circuit, utilizing distortion products

Power conversion apparatus and methods using an adaptive waveform reference

Loudspeaker control circuit

Method and apparatus having a digital PWM signal generator with integral noise shaping

Pulse width modulation method and apparatus

Low distortion class D amplifier using a controlled delay

Amplifier circuit

Power supply rejection for pulse width modulated amplifiers and automatic gain control

Power amplifier

Gate control circuit with soft start/stop function

Amplifying apparatus

Power control and modulation of switched-mode power amplifiers with one or more stages

Power amplification circuits

Multi-reference switching amplifier modulation method and apparatus

Method, circuit and power amplifier for detecting a fault, and method of protecting a circuit in a power amplifier from a fault occurrence

Synchronized controlled oscillation modulator

Digital amplifier

Switching power supply unit

Drive circuit, device, and method for suppressing noise, and use

Device and method for signal processing

Audio power source with improved efficiency

Circuit and method for switching between ternary modulation and quaternary modulation

Direct current offset protection circuit and method

Pulse width modulated amplifier

Cross-fading in dual-path pulse width modulation system

Two-stage multi-phase switch-mode power converter with inter-stage phase shedding control

Distortion compensation method for class-D audio amplifier

Wireless communication device and wireless communication method

High-efficiency RF digital power amplifier with joint duty-cycle/amplitude modulation

Wide-band amplifiers using clipper circuits for reduced harmonics

Cable TV amplifier system

Multilevel class-D amplifiers

Quaternary/ternary modulation selecting circuit and associated method