Disk recording system and a method of controlling the rotation of a turntable in such a disk recording system
US6011763A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1998 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Mar 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for controlling the rotation of a turntable relative to a recording head in a disk recording system. A first, voltage signal is generated corresponding to the radial displacement of the recording head relative to a turntable axis, and a second, frequency signal is generated corresponding to the rate of rotation of the turntable. A further voltage signal is then generated which represents the multiplication product of the radial displacement and the rate of rotation of the turntable based on the first and second signals. The rotation of the turntable is controlled in dependence on a difference between the multiplication product and a reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.