Automatic compass system for vehicle

  • US 8,608,327 B2
  • Filed: 06/17/2013
  • Issued: 12/17/2013
  • Est. Priority Date: 06/06/2002
  • Status: Active Grant
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First Claim
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1. An automatic compass system for a vehicle, said automatic compass system comprising:

  • compass circuitry, wherein said compass circuitry comprises a multi-axis compass sensor and associated circuitry;

    wherein said multi-axis compass sensor comprises magnetoresponsive sensing elements and wherein said magnetoresponsive sensing elements comprise at least first and second magnetoresponsive sensing elements;

    wherein said first and second magnetoresponsive sensing elements and at least a portion of said associated circuitry are established on a common silicon substrate using CMOS technology;

    wherein said associated circuitry comprises at least one of (i) an A/D converter, (ii) a D/A converter, (iii) signal processing circuitry, (iv) memory, (v) signal filtering circuitry, (vi) a display driver; and

    wherein said compass circuitry (i) determines a directional heading of a vehicle equipped with said automatic compass system responsive to a sensing of a magnetic field by said magnetoresponsive sensing elements and (ii) automatically compensates for a deviating magnetic field.

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