Gain controlling apparatus and method, information reproducing apparatus and method, and information recording apparatus and method
US6192011A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 19, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Nov 19, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gain controlling apparatus is provided with: an adjusting device (6, 7, 8) for adjusting a gain of a generation signal, which is generated on the basis of a light reception signal obtained by receiving a reflection light of a light beam from an information recording medium (1); and a detecting device (21, 14, 16) for detecting whether or not the generation signal is generated and outputting a detection signal when the generation signal is generated. The gain controlling apparatus is also provided with a controlling device (18) for controlling the adjusting device to increase the gain by a predetermined value set in advance when the detection signal is not outputted by the detecting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.