The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1994
Filed:
Dec. 27, 1991
Applicant:
Inventor:
Rafi A Al-Attar, Troy, MI (US);
Assignee:
Chrysler Corporation, Highland Park, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
36457103 ; 364559 ; 364457 ; 73 / ; 33356 ;
Abstract
A scaling system and technique which employs an analog-to-digital converter having at least 10-bit accuracy and a ranging circuit to compensate for abnormally large vehicle magnetic fields. The ranging circuit employs variable resistance negative feedback, which enables an electronic compass system to reduce the output voltage of an integrator to within the fixed output voltage range of the integrator. An analog-to-digital converter of at least 10-bit accuracy makes resolution of heading information possible and enhances the accuracy of subsequently performed calibrations.