Magnetic sensor device
US8193807B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2010 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Feb 17, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0029
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is a magnetic sensor device including: a switching circuit that controls switching of a terminal pair of the magnetoelectric conversion element to which a supply voltage is applied and a terminal pair to which detection voltage of a magnetic intensity is output; a differential amplifier that differentially amplifies the detection voltage; a first capacitor connected to a first output terminal of the differential amplifier; a second switch connected to a second output terminal of the differential amplifier; a comparator that has a first input terminal connected to the first capacitor and a second input terminal connected to the second switch; a first switch connected between the first input terminal and an output terminal of the comparator; and a second capacitor connected to the second input terminal of the comparator; and a detection voltage setting circuit connected to the second capacitor, in which effects of respective offset voltages of the magnetoelectric conversion element, the amplifier, and the comparator are suppressed, and an arbitrary detection magnetic field intensity is set to enable accurate magnetic reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.