Track crossing apparatus and method using the difference between pick-up velocity and a predetermined velocity
US5323368A · kind A · utility
10Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Nov 17, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08529
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To accomplish both fast track access and low power consumption in an apparatus for recording or reading out a signal onto or from a track of a recording medium. The actuator control apparatus uses a tracking error signal (TES), which is a signal whose level varies, with the time taken for a pickup to cross one track being used as a cycle. It detects the velocity of the pickup from the time interval (Ti) of the mean level crossing by TES, and provides an actuator with a signal having a pulse width (Tf) proportional to the time interval of the mean level crossing by TES, in synchronization with the crossing of the mean level by TES.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.