Patent ID: 6553272
Filing Date: 2003-04-22
Classification: H04H

Abstract:
An audio interface circuit for muting a digital audio signal having first and second channels time-multiplexed using a sample clock, said interface comprising:a multiplexer having a first input terminal coupled to receive a first channel mute signal corresponding to said first channel, a second input terminal coupled to receive a second channel mute signal corresponding to said second channel, a control terminal coupled to receive said sample clock, and an output terminal; and an AND gate having a first input terminal coupled to receive said first and second channels of said digital audio signal, a second input terminal coupled to said output terminal of said multiplexer, and an output terminal, wherein said AND gate provides at said output terminal either said first channel or a zero value signal in response to said first channel mute signal when said sample clock is in a first logic state, and provides at said output terminal either said second channel or said zero value signal in response to said second channel mute signal when said sample clock is in a second logic state.