Power conserving motor control circuit for a video tape recorder
US4161002A · kind A · utility
11Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1977 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Dec 19, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/1808
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A battery-operable video tape recorder includes a rotary magnetic head which during normal operation is driven at a predetermined speed controlled by a servo circuit. In the pause mode of the recorder the rotary magnetic head is driven at a lower, uncontrolled speed to reduce power consumption. Release of the pause mode may be delayed until the servo circuit has locked following a pause.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.