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. 13, 2022
Filed:
Mar. 11, 2019
Tdk Corporation, Tokyo, JP;
Takeo Gokita, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An object of the present invention is to provide a magnetic sensor capable of detecting a magnetic field to be measured through closed loop control even when the magnetic field is weak. A magnetic sensor includes magnetic layersandopposed to each other through a magnetic gap G, a magneto-sensitive element Rdisposed on a magnetic path formed by the magnetic gap G, and a compensation coilgenerating canceling magnetic flux ϕto cancel magnetic flux ϕapplied to the magneto-sensitive element R. According to the present invention, magnetic flux ϕflowing in the magnetic layersandeach functioning as a yoke is applied to the magneto-sensitive element R, so that even when a magnetic field to be measured is weak, it can be detected. In addition, closed loop control can be performed due to the presence of the compensation coilthat cancels magnetic flux ϕ