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Fingerprint sensing system and method

  • US 9,672,401 B2
  • Filed: 06/03/2016
  • Issued: 06/06/2017
  • Est. Priority Date: 07/09/2013
  • Status: Active Grant
First Claim
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1. A fingerprint sensing system comprising:

  • a sensor array having;

    a plurality of sensing structures; and

    read-out circuitry connected to each of said sensing structures for providing sensing signals; and

    power supply circuitry arranged to provide to said read-out circuitry a substantially constant supply voltage being a difference between a high driving voltage potential and a low driving voltage potential, wherein;

    the fingerprint sensing system is configured in such a way that, during operation of said fingerprint sensing system, said low driving voltage potential and said high driving voltage potential oscillate in phase in relation to a reference potential of a device comprising said fingerprint sensing system, while substantially maintaining said supply voltage.

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