Magnetic detection device
US9835692B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2014 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Aug 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/093
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field component in a Z direction is guided by a magnetic field guide layer and applied to a magnetic sensor in an X direction that is the same as a sensitivity axis direction thereof, and a detection output is obtained. A bridge circuit is formed with a plurality of magnetic sensors and configured such that an output is not provided for a magnetic field component in the X direction. However, when an external magnetic field in the X direction is drawn to the magnetic field guide layer, variation of sensitivity for the X direction may occur. Thus, soft magnetic characteristics of a first portion of the magnetic field guide layer are deteriorated to decrease the magnetic permeability of the first portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.