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Sensing circuit for vibration type of angular rate sensor

  • US 20060082255A1
  • Filed: 10/13/2005
  • Published: 04/20/2006
  • Est. Priority Date: 10/15/2004
  • Status: Active Grant
First Claim
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1. A sensing circuit for a vibration type of angular rate sensor, comprising:

  • a vibrator;

    a driving unit driving the vibrator to vibrate at a predetermined amplitude by using, as a feedback signal, an error voltage signal in which an amplitude of vibration of the vibrator is reflected;

    a follow-up signal forming unit forming, by using the error voltage signal, a follow-up signal following up the error voltage signal at changes which are gentler than changes in the error signal;

    a normal voltage-range setting unit setting a range of a normal voltage for the error voltage signal by using the follow-up signal; and

    a determining unit determining whether or not the sensor circuit is in a malfunctioning condition, on the basis of an estimation as to whether or not the error voltage signal is within the range of the normal voltage.

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