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Sensor with movable parts and biasing

  • US 10,194,250 B2
  • Filed: 12/19/2016
  • Issued: 01/29/2019
  • Est. Priority Date: 02/25/2011
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a sensor comprising a first electrode, a movable part, and a second electrode,a first capacitance being defined between the first electrode and the movable part,a second capacitance being defined between the movable part and the second electrode,the first electrode being directly coupled to an amplifier, andthe second electrode being directly coupled to the amplifier;

    a first switch coupling a first voltage source with;

    the movable part, orthe first electrode and the second electrode;

    a second switch coupling a second voltage source with;

    the movable part, orthe first electrode and the second electrode; and

    a clock, coupled to the first switch and the second switch, to alternately close the first switch and the second switch.

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