Device for compensating unequal write fields in magnetic data-storage devices, especially in disc memories
US4303951A · kind A · utility
4Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1979 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Jun 28, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for compensating for an inequality between the d.c. magnetic fields set up by the two oppositely acting windings, respectively, of the magnetic heads of a data storage device, particularly a disc memory, and a data storage apparatus including such a device, the device comprising means for generating a compensating direct current and feeding this current at the appropriate time to a predetermined one of the two windings of the magnetic heads. The magnitude of the compensating direct current is advantageously adjusted in dependence on the instantaneous magnitude of the write current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.