AC amplifying RF signal processing circuit for optical disk play

Details AC amplifying RF signal processing circuit for optical disk play AC amplifying RF signal processing circuit for optical disk play

1988-03-11

1989-09-12

Richardson, Robert L.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

358342, 358160, 369 59, 369 60, 360 67, 360 32, 360 331, G11B 700, H04N 576

Patent

active

048666912

ABSTRACT:
An RF signal processing circuit for processing an RF signal read from an optical disk or the like in which the entire dynamic range of an A/D converter circuit used to digitize the RF signal. An edge detector circuit detects the edges of the amplified RF signal, and a synchronizing signal detector detects a synchronizing signal in correspondence to the output of the edge detector. A timing signal is produced in correspondence to the output of the synchronizing signal detecting circuit. A clamping circuit clamps the input of the edge detector at a predetermined voltage in correspondence to the timing signal, whereby the input of the edge detector is clamped for at least a portion of the time period to the synchronizing signal.

REFERENCES:
patent: 4630231 (1986-12-01), Hirata et al.
patent: 4680647 (1987-07-01), Moriyama

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