Disc reproducing system for compensating mechanical imperfections
US4918678A · kind A · utility
27Cited by
59References
12Claims
0Family size
Inventor
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Means for reducing the effects of vertical perturbations of a phonograph disc surface resulting from disc and/or playback system mechanical imperfections. Such imperfections are compensated by closed loop and/or open loop means wherein the deviations of the record path are detected and employed to minimize the effects of the mechanical imperfections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.