METHOD AND APPARATUS FOR OPERATION SEQUENCING OF AUDIO AMPLIFIERS
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United States of America Patent
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N/A
Issued Date -
May 27, 2010
app pub date -
Nov 26, 2008
filing date -
Nov 26, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A circuit, system and method provide the suppression of pop at power up of audio amplifiers. The output driver is tri-stated at power up and is enabled after a predetermined time constant. In one embodiment, the output driver includes a MOS transistor pair connected in a push-pull configuration and switches that are under the control of a delay circuit. the. The output driver and the delay circuit may be part of a power amplifier in an audio system. The delay circuit may be implemented using mixed analog and digital signals or a digital controller configured to receive a clock frequency and execute a machine readable program code. The delay circuit is responsive for the start-up behavior of the audio system.
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