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:
Mar. 30, 1993
Filed:
Jan. 09, 1992
Osamu Shimoe, Kumagaya, JP;
Yukimasa Shonowaki, Kumagaya, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A magnetic sensor has first, second, third and fourth magneto-resistance effect elements disposed in a direction of a magnetizing pitch (1) of a magnetic recording medium serving to supply a magnetic signal, with first and second magneto-resistance effect elements disposed spacedly from each other at an interval corresponding to an electrical angle of .theta., the third and fourth magneto-resistance effect elements disposed spacedly from each other at an interval corresponding to an electrical angle of (360.degree.-.theta.), and the intervals between the center line of the first and second magneto-resistance effect elements and between the line of the third and fourth magneto-resistance effect elements being set to n.lambda.. The four magneto-resistance effect elements are connected to one another in series in the order of the first, second, fourth and third magneto-resistance effect elements with both ends of the serially-connected magneto-resistance effect elements being provided with a power source terminal, and an output terminal being provided at a conjunctive point of the second and fourth magneto-resistance effect elements. .theta. is set to a range of 30.degree..ltoreq..theta..ltoreq.90.degree., based on .lambda.=360 to thereby enable an output wave form of the magnetic sensor to have a large or sharp gradient in the vicinity of a comparing level.