Circuit arrangement for a disk player for reproducing informatio

Details Circuit arrangement for a disk player for reproducing informatio Circuit arrangement for a disk player for reproducing informatio

1982-05-28

1985-04-02

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 61, G11B 1502, G11B 700

Patent

active

045091552

ABSTRACT:
In a circuit arrangement for a disk player of the type arranged to reproduce information prerecorded in the form of pits, a variable gain circuit for changing the frequency characteristic of the reproduced signal is provided. The level of the reproduced signal is detected at high and low frequencies so as to produce a control signal the voltage of which varies in accordance with the difference between the level of the high frequency signal component and the level of the low frequency component. The control signal is then applied to the variable gain circuit receiving the reproduced signal so that the frequency characteristic of the reproduced signal will be controlled. Thus, the level of the reproduced signal is boosted at its high frequency range.

REFERENCES:
patent: 3310745 (1967-03-01), Deasy et al.
patent: 3643013 (1972-02-01), Lemoine
patent: 3862355 (1975-01-01), Guisinger
patent: 3906152 (1975-09-01), Hoogendijk
patent: 4165495 (1979-08-01), Takahashi
patent: 4414668 (1983-11-01), Iwasaki

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