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Displacement detection device for a portable apparatus

  • US 20060213267A1
  • Filed: 11/30/2005
  • Published: 09/28/2006
  • Est. Priority Date: 12/01/2004
  • Status: Active Grant
First Claim
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1. A displacement detection device, comprising:

  • an acceleration sensor generating a first acceleration signal relating to a first axis of detection; and

    a displacement detection circuit connected to said acceleration sensor and comprising a first comparator stage for comparing said first acceleration signal with a first acceleration threshold and generating a first displacement detection signal, said displacement detection circuit further comprises first filtering means arranged between said acceleration sensor and said first comparator stage and configured to reduce a DC component of said first acceleration signal.

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