Method and apparatus for testing the resistive properties of magneto resistive materials using a time variable magnetic field
US5696445A · kind A · utility
25Cited by
21References
27Claims
0Family size
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Inventor
Key dates
| Filing date | Sep 26, 1994 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Sep 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tester for measuring the resistance of magnetoresistive heads as a function of the magnetic field applied to the heads. The tester applies a time varying magnetic field to the magnetoresistive head to be tested and filters the resulting time varying (AC) voltage signal indicative of the resistance of the head with a capacitor to remove the DC component of the signal. The AC component of the signal is then amplified, digitized, and analyzed to obtain the resistance properties of the magnetoresistive head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.