Signal processing circuit for optical disk apparatus

Details Signal processing circuit for optical disk apparatus Signal processing circuit for optical disk apparatus

1992-07-01

1994-05-03

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369120, G11B 700, G06F 1500

Patent

active

053094255

ABSTRACT:
A signal processing circuit for a disk apparatus with an optical head, which causes photodiodes to detect light acquired by irradiating light from a laser diode on a disk that has an address portion and data portion recorded thereon, and performs photoelectric conversion of the light. A level converter alters the level of the signal detected by each photodiode and provides an output signal. A detector detects a level of the output signal by switching time constants between the address portion and data portion. Using a bias corresponding to the detected level, the levels of signals detected by the photodiodes are changed.

REFERENCES:
patent: 5318500 (1992-08-01), Haikawa et al.

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