Magnetic sensor device
US9453889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2015 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Jun 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To provide a magnetic sensor device which maintains accuracy thereof while reducing current consumption by switching drive power of a Hall element to two drive power. A magnetic sensor device is equipped with a driving circuit which supplies power to a sensor element, a switch changeover circuit which restricts the supply of the power from the driving circuit to the sensor element, a differential amplifier circuit which performs arithmetic processing on an output signal of the sensor element, a threshold voltage generating circuit which generates a threshold voltage used in magnetism determination, a comparison circuit which compares and determines a voltage of the differential amplifier circuit and the threshold voltage, and a logic circuit which according to the output of the comparison circuit, switches the power outputted from the driving circuit, switches the threshold voltage and controls on/off of the switch changeover circuit in a constant cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.