Information signal reproducing system having amplifier with sele

Details Information signal reproducing system having amplifier with sele Information signal reproducing system having amplifier with sele

1993-09-08

1995-01-10

Psitos, Aristotelis

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369100, G11B 700

Patent

active

053813987

ABSTRACT:
An information signal reproducing circuit for use in an optical information recording/reproducing apparatus, includes a photo detector, a plurality of amplifiers and a plurality of couplings for connecting the amplifiers to each other in a serial manner. A gain of a signal produced by the photo detector is decreased only for a time period during which information is recorded or erased in the information recording/reproducing apparatus. Therefore, in case the amplifiers are serially connected to each other by means of AC couplings, information signal can be correctly read out without being influenced by transients of capacitors constituted of the AC couplings. In case the amplifiers are serially connected to each other by means of DC couplings, information signal can be correctly read out without causing a latch up.

REFERENCES:
patent: 5005163 (1991-04-01), Yamamoto et al.
patent: 5124967 (1992-06-01), Isaka et al.

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