Disk reproducing apparatus for precisely determining a value...

Details Disk reproducing apparatus for precisely determining a value... Disk reproducing apparatus for precisely determining a value...

2006-01-31

2006-01-31

Young, W. R. (Department: 2652)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S044360, C369S047170, C369S047220, C369S053330

Reexamination Certificate

active

06992956

ABSTRACT:
A disk reproducing apparatus includes a variable gain amplifier (VCA) (32), and the VCA applies a radial push-pull signal including an address signal and an FCM leakage-in signal to a switch (38). The switch outputs only the address signal to a peak-hold circuit (40) on the basis of an FCM mask signal from a mask signal generation circuit (36). The peak-hold circuit generates a peak-hold signal of the address signal so as to be output to a DSP (30), and the DSP controls a gain of the VCA on the basis of the peak-hold signal. Then, the radial push-pull signal in which the gain is controlled on the basis of the address signal is applied to an address detection circuit (42), and the address signal is detected therein.

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