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:
Jun. 25, 1985
Filed:
Sep. 08, 1982
David J Sansom, Chertsey, GB;
EMI Limited, Hayes, GB;
Abstract
A sensing element suitable for sensing two components h.sub.x and h.sub.y of an external magnetic field in an orthogonal co-ordinate system comprises a reverse C-shape first electrical conductor vacuum deposited onto an electrical insulating substrate. A layer of photoresist applied to a region insulates the conductor from a magnetoresistive element which has two connectors linked thereto. Further application of photoresist insulates the element from a second vacuum deposited electrical conductor. Wires locate with respective conductors where gold deposition in the vicinity of the wire ends achieves electrical continuity. A control circuit applies current, within a periodic cycle, in alternate directions through the first conductor while a current is applied in a single direction through the second conductor. In the following cycle the current direction through the second conductor is reversed. Values of the element electrical resistivity for the four combination of current (and hence magnetic field) directions allow solution of a simultaneous equation to yield h.sub.x and h.sub.y.