Signal processing circuit for optical disc drivers and the related method
US7532560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2005 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Jul 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal processing circuit for adjusting an input signal and generating a corresponding digital output signal in an optical disk driver is provided. The signal processing circuit includes an attenuator for receiving and attenuating the input signal and then generating an attenuated output signal; a gain controllable amplifier for receiving and amplifying the input signal and then generating an amplified output signal; a control unit providing a control signal and a select signal, the control signal is directed to the attenuator and the gain controllable amplifier for enabling/disabling the attenuator and the gain controllable amplifier and for controlling their gains such that one of the attenuator and gain controllable amplifier is enabled at a time; and a waveform adjuster circuit for adjusting the amplified/attenuated output signal delivered from the gain controllable amplifier or the attenuator so as to generate the digital signal related to the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.