Disc speed control device
US6952386B1 · kind B1 · utility
4Cited by
8References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2000 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Jun 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc speed control device for use in a disc player and/or recorder having a pick-up for reading/recording data. The device comprises an inner loop which regulates a determined disc rotation speed value received at its input and an outer loop which delivers this speed value depending on a frequency at which data is read by the pick-up. The present invention is particularly useful in multistandard disc drives which need to adjust to different disc speed modes, for example, constant angular velocity, or constant linear velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.