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SYSTEM AND METHOD FOR MEASURING A CAPACITANCE AND SELECTIVELY ACTIVATING AN INDICATING TRANSDUCER

  • US 20100045310A1
  • Filed: 08/20/2008
  • Published: 02/25/2010
  • Est. Priority Date: 08/20/2008
  • Status: Active Grant
First Claim
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1. A capacitive sensor comprising:

  • a first sensor electrode coupled to a first terminal;

    a second sensor electrode coupled to a second terminal;

    a first driver circuit coupled to the first terminal and a second driver circuit coupled to the second terminal, where in a first mode the first driver circuit and the second driver circuit are configured to drive the first terminal and the second terminal to substantially equal levels of electrical potential for sensing capacitances associated with the first sensor electrode and the second sensor electrode, and where in a second mode the first driver circuit and the second driver circuit are configured to drive the first terminal and the second terminal to first substantially different levels of electrical potential for activating an indicating transducer that is capable of being coupled between the first terminal and the second terminal.

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