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Inclination angle detection apparatus and automobile theft alarm apparatus using the same

  • US 5,155,467 A
  • Filed: 04/16/1991
  • Issued: 10/13/1992
  • Est. Priority Date: 04/17/1990
  • Status: Expired due to Term
First Claim
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1. An inclination angle detection apparatus comprising:

  • a sensor for sensing the angle of inclination;

    a differential amplifier for amplifying an output of the sensor;

    an offset compensating circuit which supplies a reference voltage to an input terminal of the differential amplifier by comparing an output of the differential amplifier with a constant value and integrating a differential output resulting from subtraction between the output of the differential amplifier and the constant value;

    a switching means to increase a time constant for increasing the total integration time constant of the offset compensating circuit so as to be greater than the time constant of integrating elements thereof by intermittently supplying the output of the differential amplifier to the offset compensating circuit; and

    a means for detecting the angle of inclination in response to the output of the differential amplifier.

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