Control signal for recording a disc according to a clock signal, data signal, and an index signal
US5768235A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Oct 8, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/261
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement modulates a disc-recording control signal as a function of data collected before and after an input data pulse and of the index signal of the recording disc. The circuit arrangement includes a tracking circuit, a timing control circuit, a programmable digital circuit, and a data output circuit. The tracking circuit monitors the index signal and provides a disc-location signal indicative of the disc recording zone. The timing control circuit clocks in the data signal and, in response thereto, generates a delayed pulse edge control signal. The programmable digital circuit responds to the disc-location signal and the timing control circuit by generating a level-setting digital signal and a delay setting digital signal for the timing control circuit. These signals are preselected as a function of the disc recording zone and the data in the input data signal. The data output circuit responds to the level-setting digital signal and the pulse edge control signal by generating the disc-recording control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.