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:
Oct. 06, 1998
Filed:
Sep. 27, 1996
Applicant:
Inventor:
Manabu Aizawa, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; H01F / ; H01F / ;
U.S. Cl.
CPC ...
324258 ; 324260 ; 336198 ; 336221 ; 336225 ;
Abstract
A magnetic sensor includes an elongated magnetic core and a coil wound on the periphery of the magnetic core so as to detect a magnetic field based on the change of inductance of the coil with high sensitivity and without increasing the number of turns of the coil. The number of turns of the coil in the central part of the magnetic core is larger than that of the coil at the end parts of the magnetic core. Thus, a bias field due to a bias current supplied to the coil is efficiently applied to the magnetic core. As a result, the inductance of the coil can be set to a large value without increasing the number of turns of the coil and a high sensitivity can be obtained.