Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2006-08-22
2006-08-22
Young, W. R. (Department: 2652)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S053340
Reexamination Certificate
active
07095689
ABSTRACT:
A method and device for controlling a rotation speed of a spindle of an optical disk drive includes a frequency detector, two phase detectors, a frequency divider, a low pass filter, a switch circuit, and a drive circuit. The method uses a wobble signal, an encoder EFM frame synchronization (EEFS) signal, an encoder subcode frame synchronization (ESFS) signal, and other related signals to generate five control signals for controlling the rotation speed of a motor connected to the spindle of the optical disk drive. Using the five control signals, the method limits the phase difference between the Absolute Time in Pre-groove (ATIP) sync and the ESFS to be within a predetermined value, and thus improves an update rate and a writing efficiency.
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Hsu Winston
Kim Kyung D.
VIA Technologies Inc.
Young W. R.
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