Magnetic disk apparatus
US4980784A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Jun 1, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5556
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In the magnetic disk apparatus according to the invention, the latch circuit latches the content of the logic signal provided from the comparative operational circuit at the end of the seek operation and holds the latched content during a track trace operation, and the linear position signal selected to constitute a closed loop positioning system is fixed to that at the end of seek operation for controlling the head position, so that recoverable allowance of the deviation from the center of the desired track (i.e., off-track amount) of the head at the time of the track trace operation can be increased to increase the reliability of seek operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.