Rotation detecting device using magnetic sensor
US7355388B2 · kind B2 · utility
59Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2006 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Apr 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/73265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotation detecting device is provided that detects the rotation of a rotating object by means of a biasing permanent magnet and multiple sensor chips. The sensor chips are disposed on front and back sides of a mounting chip along the rotation direction of the rotating object, aligned with a line perpendicular to the direction or rotation of the rotating object, so as to convert magnetic vectors of a magnetic field to a plurality of sensor signals. A selection circuit is connected to the magnetoresistance sensors and selects the one of the sensor signals whose magnitude is the largest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.