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Surface capacitance sensor system using buried stimulus electrode

  • US 20030020495A1
  • Filed: 05/22/2002
  • Published: 01/30/2003
  • Est. Priority Date: 05/22/2001
  • Status: Active Grant
First Claim
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1. A capacitance sensor device comprising:

  • a semiconductor integrated circuit;

    a sensor electrode array arranged in a two dimensional array of n rows and m columns;

    a stimulus electrode array arranged in a one dimensional array of n rows;

    a quantity of n time-varying voltage sources connected to n rows of stimulus electrodes;

    a quantity of m time-varying voltmeters; and

    a quantity of m blocks of n switches that allows the connection of one of the n sensor electrodes along a column to one time-varying voltmeter.

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