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Multicapacitor sensor array

  • US 7,343,813 B1
  • Filed: 02/15/2006
  • Issued: 03/18/2008
  • Est. Priority Date: 02/15/2005
  • Status: Active Grant
First Claim
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1. A capacitive shear sensor array comprising:

  • a plurality of conductive drive plates lying in a first plane anda plurality of conductive sense plates lying in a second plane parallel to the first plane,said first and second planes separated by a dielectric;

    each of the drive plates being partially overlapped by each of a pair of the sense plates, the pair of sense plates being spaced apart over the drive plate; and

    means to energize a subset of drive plates and means to sample the capacitance of the sense plates overlapping the drive plates sequentially pair by pair,wherein the means to sample the capacitance of the paired sense plates includes a differential amplifier.

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