Method of skipping tracks while searching for a track and circuitry for carrying out the method
US4845698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1987 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Feb 5, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08517
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Process for track jumping in track searching process for a rotating information carrier scanned with an optical system, in which the system works in conjunction with a radial coarse (13) and fine (3) drive system. If the coarse drive is immediately put into operation in accordance with the input search direction, the servocircuit of the fine drive system is initially closed and is only opened as a function of criteria prevailing at the time. In this process and in the circuit arrangement envisaged for its implementation, the principal advantage is a high search speed and considerable initial acceleration. In particular, the movement overlaps occurring in the starting phase do not present a problem for the perfect operation of the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.