Apparatus for automatic measurement of resistance of integrated MR device
US6225802A · kind A · utility
25Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Jul 19, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for measuring the resistance of an MR element which passes a bias current Imr and which derives a bias voltage. A voltage comparator CMP receives the bias voltage Vmr and a reference voltage Vref. A counter UPCNT has an enable input EN coupled to the output of the comparator and a digital output forming the output of the device. A current source supplies the bias current Imr which represents a digital value received by the current source at its control input which is coupled to the digital output of the counter. The device enables the digital value of a resistance to be measured automatically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.