Apparatus and methods for light spot servo signal detection
US7796480B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2007 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Nov 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1287
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for light spot servo signal detection for reading an optical recording medium having a plurality of non-writable areas between writable data areas containing address information. An optical pickup provides a light spot to the non-writable areas of the optical recording medium with a predetermined state according to a control signal, and detects optical reflecting signals from the optical recording medium to generate a detection signal. A signal adjusting module offsets signal levels of the detection signal to an operating range to generate an offset shifted detection signal. An analog to digital converter digitizes the offset shifted detection signal to generate a digital signal. A detection circuit detects the servo detection signal according to the digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.