Magnetic field detection device and method of detecting magnetic field
US11249152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2020 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | May 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field detection device includes a magnetism detection element, a modulator, and a demodulator. The magnetism detection element has a sensitivity axis along a first direction. The modulator is configured to impart a spin torque to the magnetism detection element. The spin torque has a rotational force and oscillates at a first frequency. The rotational force is exerted on a plane including the first direction and a second direction orthogonal to the first direction. The demodulator is configured to demodulate an output signal received from the magnetism detection element and to detect an intensity of a measurement target magnetic field exerted on the magnetism detection element on the basis of an amplitude of the output signal. The output signal has the first frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.