Magnetic sensor design for suppression of barkhausen noise
US8242776B2 · kind B2 · utility
16Cited by
40References
8Claims
0Family size
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Key dates
| Filing date | Mar 26, 2008 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Dec 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1107
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A semiconductor process and apparatus provide a high-performance magnetic field sensor from two differential sensor configurations (201, 211) which require only two distinct pinning axes (206, 216), where each differential sensor (e.g., 201) is formed from a Wheatstone bridge structure with four unshielded MTJ sensors (202-205), each of which includes a magnetic field pulse generator (e.g., 414) for selectively applying a field pulse to stabilize or restore the easy axis magnetization of the sense layers (e.g., 411) to eliminate micromagnetic domain switches during measurements of small magnetic fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.