Magnetometer with dual purpose reset and calibration coil
US9599693B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2012 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Aug 14, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a magnetic field sensing device that utilizes a single coil for calibrating the response of the sensor to compensate for temperature dependent sensitivity drift and also for resetting the magnetic field sensor in order to eliminate hysteresis. The single coil configuration is advantageous since it reduces the size of the sensor chip by decreasing the number of contact pads on the chip and also because it wastes less space, which permits an increase in the density of the magnetoresistive elements on the sensor chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.