Disk player for changing the playing linear velocity in multiple

Details Disk player for changing the playing linear velocity in multiple Disk player for changing the playing linear velocity in multiple

1993-10-21

1995-05-30

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, G11B 700

Patent

active

054208424

ABSTRACT:
The object of the present invention is to provide a disk player, which is capable of changing the playing linear velocity by multiple stages to shorten the reading time. The disk player comprises includes an optical pick-up for reading data and outputting data signals; a first clock section for generating master clock signals, the first clock section being capable of changing the frequency of the master clock signals by multiple stages; a second clock section for generating second clock signals; a comparing section for comparing frequency and phase of the master clock signals and the second signals and generating deviation signals; and a drive section for sending drive signals, whose voltage level changes according to voltage changes of the deviation signals, to a motor for rotating a disk, whereby the drive section controls the motor so as to synchronize the frequency and the phase of the second clock signals with those of the master clock signals.

REFERENCES:
patent: 5036508 (1991-07-01), Okano
patent: 5163035 (1992-11-01), Horikiri
patent: 5170386 (1992-12-01), Tateishi
patent: 5278814 (1994-01-01), Deguchi et al.

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