Tracking correction for a rotary head by detection of the minimum signal level
US4777543A · kind A · utility
8Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1986 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Aug 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/4675
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an automatic tracking system for a magnetic recording and reproducing apparatus wherein tracking is controlled so as to increase an amplitude of a reproduced signal which is delivered from a rotary head for reproducing a track recorded by a helical scan system, the amplitudes of the reproduced signal are detected at a plurality of points of time within one rotational cycle of the rotary head, and the tracking is controlled so as to increase a minimum value among the detected values at the plurality of points of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.