Magnetic head tracking control system
US4296443A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Feb 23, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/592
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an apparatus for reproducing video or other information signals recorded in successive parallel tracks extending obliquely on a magnetic tape or other record medium which is adapted to be longitudinally advanced, and with each of the tracks containing a positional signal, for example, constituted by a vertical synchronizing signal, at a predetermined position along the respective track, a magnetic head or transducer is movable in the direction generally along the tracks for reproducing the information and positional signals recorded therein and is mounted or supported by a bi-morph leaf or other transducer deflecting device which is operative, in response to the reception of an electrical drive signal, for deflecting the transducer or head in a direction transverse to the direction along the tracks, a circuit detects a time base error of the positional signal reproduced from each of the tracks, and a control circuit for providing the electrical drive signal to the transducer deflecting device is effective to vary such drive signal in accordance with the detected time base error. A time base variation of the reproduced signals is further detected, for example, in respect to the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.