Click free mute switch circuit for telephones
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United States of America Patent
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Feb 10, 2004
Grant Date -
N/A
app pub date -
May 16, 2000
filing date -
May 17, 1999
priority date (Note) -
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Abstract
A circuit for eliminating switching noise from a mute switch connected between a microphone capable of receiving and transmitting audio signals to a communication system, comprising, a switch state detector connected to the mute switch for generating an on signal in the event that the mute switch is open and generating an off signal in the event that the mute switch is closed, a codec circuit connected to the mute switch in parallel with the switch state detector for delaying the audio signals received by the microphone, and a CPU connected to the codec circuit for receiving the on signal and in response muting the audio signals and for receiving the off signal and in response transmitting the audio signals to the communication system.
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