Optical recording apparatus
US5111443A · kind A · utility
27Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1991 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24085
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pulse width adjustment circuit for an optical disk recording system selectively adjusts the width of pulses to be recorded in dependence upon an input control signal, which in turn is dependent upon the width of the pulse to be adjusted. In one embodiment a minimum bit length pulse is widened and all other pulses are narrowed. This is useful in recording on the inner portions of a CAV optical disk. In another embodiment a selectable control signal determines whether the minimum bit length signal is to be narrowed or widened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.