Tracking control circuit of helical scanning magnetic tape apparatus
US5003413A · kind A · utility
9Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Aug 31, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/4678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a digital audio magnetic tape reproducing apparatus of herical scanning using two magnetic heads, a first head reproduces a pilot signal of its own track and two pilot signals of both neighboring tracks of its own track by affection of crosstalk, then a difference value between the values of the reproduced signals of the two pilot signals is calculated and is applied to a tracking servo system as a tracking error signal, moreover, the difference value is controlled by a reproduced signals of a pilot signal reproduced by a second magnetic head in the previous reproducing period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.