Rotation control circuit, semiconductor integrated circuit,...

Details Rotation control circuit, semiconductor integrated circuit,... Rotation control circuit, semiconductor integrated circuit,...

2006-03-14

2006-03-14

Korzuch, William (Department: 2653)

Dynamic information storage or retrieval

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

C369S047410, C369S053140

Reexamination Certificate

active

07012863

ABSTRACT:
A rotation control circuit comprising, a pickup controller configured to amplify an error signal detected by a pickup from an optical disk, and to generate both a low-frequency component in the error signal and a pickup control signal so as to control the pickup, a memory controller configured to generate a memory address control signal in synchronization with a frequency generator signal provided by a disk motor, a memory circuit configured to store the low-frequency component by using the memory address control signal at a specified timing, a compensation signal adder configured to add the low-frequency component to the pickup control signal at another specified timing, and a system controller configured to control operational timing of the memory controller and the compensation signal adder.

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