Apparatus and method for reading and writing data on a magnetic disc
US4561028A · kind A · utility
11Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1983 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Aug 18, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for controlling a magnetic head carriage while reading or writing data on a magnetic disc by the use of a pair of heads having zero intertrack spacing and having azimuth angles of plus and minus 45.degree. with the circumference of the disc to sense the timing and phasing of sector sync pulses recorded on the disc and, from such timing phasing, as read by the heads, the rotational position of the disc and the radial position of the head carriage, to generate an appropriate head carriage servo signal which compensates for eccentricity of the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.