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Capacitive touch switch system for an audio device

  • US 7,106,221 B2
  • Filed: 04/30/2003
  • Issued: 09/12/2006
  • Est. Priority Date: 04/30/2003
  • Status: Active Grant
First Claim
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1. A capacitive touch switch system for an audio device, comprising:

  • a detecting circuit having a first conductive touch pad, a second conductive touch pad, a rectifier circuit coupled with the first conductive touch pad and the second conductive touch pad, a voltage doubler circuit coupled with the rectifier circuit, a single-pole high pass filter, a capacitive sensing device and a filter circuit, where the capacitive sensing device senses a change in capacitance at a location, where the filter circuit reduces interference from the capacitive sensing device; and

    a transceiving circuit coupled to the detecting circuit, where the transceiving circuit transmits an output signal in response to an input signal from the detecting circuit, where the output signal controls at least one audio parameter.

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