Vehicle compass with electronic sensor

  • US 5,255,442 A
  • Filed: 12/20/1991
  • Issued: 10/26/1993
  • Est. Priority Date: 12/20/1991
  • Status: Expired due to Fees
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First Claim
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1. An electronic compass for use in a vehicle comprising:

  • a magnetoresistive sensor for detecting an external magnetic field and developing electronic signals representative of said external magnetic field, said external magnetic field being a combination of the earth magnetic field and a deviating field of the vehicle,a digital electronic circuit for determining the strength and direction of the vehicle deviating magnetic field,said sensor including means for nullifying said deviating magnetic field in said sensor,said nullifying means being coupled with said electronic circuit and energized thereby in accordance with the strength and direction of said deviating magnetic field whereby said sensor develops a deviation compensated signal corresponding to the earth field.

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