Radio frequency signal processing circuit which prevents stepwis

Details Radio frequency signal processing circuit which prevents stepwis Radio frequency signal processing circuit which prevents stepwis

1990-09-05

1991-03-19

McElheny, Jr., Donald

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 4431, 369 4434, G11B 700

Patent

active

050016938

ABSTRACT:
A reference level adjusting circuit for a signal containing both DC and RF components, such as provided by a read head in an optical recording and reproduced device. In the reproduction mode, the read input signal is capacitively coupled through an amplifier to an A/D converter. A read input signal detected from an unrecorded area is held and, during the recording mode, is substituted for the presently read input signal.

REFERENCES:
patent: 4408314 (1983-10-01), Yokota
patent: 4663751 (1987-05-01), Kaku et al.
patent: 4682314 (1987-07-01), Nakagaki et al.
patent: 4807210 (1989-02-01), Kaku et al.
patent: 4815061 (1989-03-01), Yasumura et al.

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