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Ultra Low Power Wake-On-Event Mode For Biometric Systems

  • US 20100180136A1
  • Filed: 01/15/2009
  • Published: 07/15/2010
  • Est. Priority Date: 01/15/2009
  • Status: Abandoned Application
First Claim
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1. An apparatus for reducing power consumption in fingerprint-sensing circuits, the apparatus comprising:

  • a fingerprint sensing area onto which a user can apply a fingerprint; and

    an integrated circuit for detecting finger activity over the fingerprint sensing area, the integrated circuit comprising;

    a primary logic portion configured to assume control of the integrated circuit when finger activity is detected over the fingerprint sensing area; and

    a secondary logic portion configured to assume control of the integrated circuit and shut off power to the primary logic portion when finger activity is not detected over the fingerprint sensing area.

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