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AUDIO APPARATUS HAVING DYNAMIC GROUND BREAK RESISTANCE

  • US 20150382104A1
  • Filed: 06/26/2014
  • Published: 12/31/2015
  • Est. Priority Date: 06/26/2014
  • Status: Active Grant
First Claim
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1. An audio apparatus comprising:

  • an audio source;

    a connector having a signal out pin and a return pin to be coupled to an external load;

    a variable resistor circuit coupled to provide variable resistance between the return pin of the connector and a ground plane of the apparatus;

    an audio amplifier having a first input coupled to the audio source, a second input coupled to the return pin of the connector, and an output that is coupled to the signal out pin of the connector;

    an amplifier headroom detector to detect headroom of the audio amplifier; and

    a controller having an input coupled to an output of the headroom detector, the controller being to coupled to control the variable resistor circuit in response to said headroom detection.

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