Tracking servo control unit for an information reproducing apparatus
US4539665A · kind A · utility
22Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Feb 22, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information reproducing apparatus having a tracking servo control loop for causing an information reading unit including device for detecting a tracking error signal for tracking an information bearing track on a disc, to track the information bearing track in accordance with the tracking error signal so as to reproduce information in accordance with an information signal read by the information reading unit. A circuit for extracting a discrimination signal for discriminating a negative feedback region of the tracking error signal is provided so that a tracking servo control loop is closed in the negative feedback region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.