220270 ⎘
Gain control in amplifiers or frequency changers without distortion of the input signal; Automatic control in amplifiers having semiconductor devices; Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
Control Based On Proximity
#2PLAY MUTE CIRCUIT AND METHOD
#3Control Based On Proximity
#4Control based on proximity
#5Method and device for eliminating unstable noise
#6Audio control circuit and associated control method
#7Sigma-delta analog to digital converter
#8Audio device for reducing pop noise and processing method thereof
#9Mute control circuit used upon power-on or power-of, control method, and audio device
#10Control based on proximity
#11Modular signal conversion apparatus and method
#12Apparatus for discarding power noise, and apparatus for converting audio signal
#13Audio signal muting apparatus, and digital signal conversion apparatus equipped with same
#14Reducing impedance discontinuities on a shared medium
#15Methods and circuits to reduce pop noise in an audio device
#16Power supply circuit and sound equipment
#17Audio device and control method for an audio device
#18Control based on proximity
#19Mute pattern injection for a pulse-density modulation microphone
#20Auto-mute audio processing
#21Systems and methods for handling silence in audio streams
#22Systems and methods for handling silence in audio streams
#23Reducing impedance discontinuities on a shared medium
#24Embedded speaker protection for automotive audio power amplifier
#25Systems and methods for handling silence in audio streams
#26Clamping audio signal paths
#27Apparatus for preventing noise in electronic device
#28Methods and circuits to reduce pop noise in an audio device
#29Embedded speaker protection for automotive audio power amplifier
#30Class-D audio amplifier
#31Playback and light control based on proximity
#32Embedded speaker protection for automotive audio power amplifier
#33Methods and circuits to reduce pop noise in an audio device
#34Method and apparatus for reducing noise due to path change of audio signal
#35Playback control based on proximity
#36Wireless mute device and method
#37Microphone biasing circuitry and method thereof
#38Audio device
#39Embedded speaker protection for automotive audio power amplifier
#40Headphone driver for attenuating pop and click noises and system on chip having the same
#41Converter with an additional DC offset and method thereof
#42Method and apparatus for processing a switched audio signal from a crosspoint router
#43SIGNAL OUTPUT DEVICE AND SIGNAL OUTPUT METHOD
#44Audio device and method having bypass function for effect change
#45Circuit and method for driving a loudspeaker
#46Methods and circuits to reduce pop noise in an audio device
#47METHOD AND APPARATUS FOR FILTERING AN AUDIO SIGNAL
#48Pop-click noise grounding switch design with deep sub-micron CMOS technology
#49Radio mute strategy for non-can radios used with smart starting systems
#50Pop/click noise reduction circuitry for power-up and power-down of audio output circuitry
#51POP noise suppression circuit and system
#52Multiple input audio switch
#53Modification of audio responsive to proximity detection
#54Grounding switch method and apparatus
#55Vehicle proximity annunciator device
#56MUTE DRIVE CIRCUIT
#57Earphone jack drive circuit
#58Embedded speaker protection for automotive audio power amplifier
#59Portable loudspeaker
#60Sound processing apparatus, sound system and sound processing method
#61Transient signal suppression for a class-D audio amplifier arrangement
#62Wireless function state synchronization
#63Audio processing device and audio systems using the same
#64Power management controller for drivers
#65Amplifier with improved noise reduction
#66Multimedia output device with detection and protection circuit and audio output method thereof
#67Portable Loudspeaker
#68Portable Loudspeaker
#69Automated noise reduction circuit
#70AUDIO PROCESSING APPARATUS, AUDIO PROCESSING SYSTEM, AUDIO PROCESSING METHOD
#71Sound signal processing apparatus
#72Apparatus and method of reducing noise for frequency modulated signals
#73Pop sound reduction circuit and audio circuit having such pop reduction circuit for use in audio amplifier
#74Anti-glitch system for audio amplifier
#75AMPLIFIER CIRCUIT
#76Grounding switch method and apparatus
#77Audio hole suppression method and apparatus for a two-way radio
#78TELEVISION SET AND SPEAKER SYSTEM
#79Amplifier with reduced output transients and method therefor
#80AUDIO APPARATUS
#81SIGNAL OUTPUT DEVICE AND SIGNAL OUTPUT METHOD
#82Output circuit for audio codec chip
#83AUDIO OUTPUT DEVICES
#84METHOD FOR REMOVING POP-UP NOISE IN MOBILE DEVICE
#85Quiet power up and power down of closed loop digital PWM modulators
#86DOUBLE INTEGRAL METHOD OF POWERING UP OR DOWN A SPEAKER
#87Circuit and method for reducing popping sound
#88De-pop controller and method thereof
#89Eyeglasses with detachable adjustable electronics module
#90Power management controller for drivers
#91LARGE RC TIME-CONSTANT GENERATION FOR AUDIO AMPLIFIERS
#92Mute circuits
#93Audio processor
#94Prevention of audio pop in a digital audio device
#95MUTE CIRCUIT
#96Pop noise suppression apparatus and audio output system utilizing the same
#97Preset circuit of audio power amplifier
#98Muting control device, muting control method, and muting control program
#99AUDIO SIGNAL AMPLIFIER CIRCUIT WITH A MUTE FUNCTION
#100Eyeglasses with detachable adjustable electronics module
#101Signal amplifier circuit
#102Information processing apparatus that maintains sound controller in power saving mode when speaker is set in volume full-mute state
#103Audio Amplifier with Reduced Noises
#104System and method for muting TV speakers when headphones in use
#105Amplifier apparatus and method
#106Apparatus and muting circuit
#107Noise reduction system and method for audio switching amplifier
#108Mode switching method, mode switching program, and broadcast receiving terminal
#109Wireless interactive headset
#110Circuit arrangement for suppression of switching noises
#111Amplifier apparatus and method
#112Amplifier apparatus and method
#113DEVICE FOR PREVENTING POP NOISE IN AN AUDIO OUTPUT APPARATUS AND METHOD THEREFOR
#114Audio output apparatus and television broadcast receiver
#115Audio amplifier and methods for use therewith
#116Circuit for suppressing audio noise
#117Noise elimination circuit for audio equipment
#118Audio muting circuit and audio muting method
#119Audio muting circuit and audio muting method
#120Charge/discharge control circuit for audio device
#121Muting circuit and semiconductor integrated circuit
#122Eyeglasses with detachable adjustable electronics module
#123Anti-pop driver circuit
#124Audio processing apparatus and method
#125Wireless interactive headset
#126Electronic device comprising audio mute control circuit
#127Circuit and method for eliminating pop noise in digital audio amplifier using dual power supply
#128Driver circuit with gradual voltage ramp up and ramp down
#129Mute circuit
#130Audio signal output circuit and electronic apparatus outputting audio signal
#131Wireless interactive headset
#132Automatic gain control circuit and receiver device having the automatic gain control circuit, and automatic gain control method
#133Supplying a ramp voltage to an amplifier
#134MUTE CIRCUIT OF AN AUDIO DEVICE FOR SUPPRESSING AUDIO SIGNALS DURING TRANSIENTS OF POWER SWITCHING
#135Pop and click reduction using DAC power up and power down processing
#136APPARATUS AND METHOD FOR ELIMINATING NOISE