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Electronic compass system

  • US 7,266,452 B2
  • Filed: 11/07/2006
  • Issued: 09/04/2007
  • Est. Priority Date: 03/01/2002
  • Status: Expired due to Term
First Claim
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1. An electronic compass system for use in a vehicle having vehicle equipment consisting of one of a convertible top and sunroof, said electronic compass system comprising:

  • a magnetic sensor circuit for sensing at least two components of the Earth'"'"'s magnetic field vector and generating output signals representing the at least two sensed components;

    a processing circuit coupled to the magnetic sensor circuit for sampling the output signals from the magnetic sensor circuit, computing a heading of the vehicle as a function of the sensed components, and generating a heading signal representing the computed heading; and

    compensating means for compensating for the effect of a change in the opened or closed state of the vehicle equipment on the magnetic field sensed by the magnetic sensor circuit.

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