Optical disc apparatus with selectively shiftable seek operation

Details Optical disc apparatus with selectively shiftable seek operation Optical disc apparatus with selectively shiftable seek operation

1995-04-27

1997-06-03

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 50, 369 54, 369 4426, G11B 2014, G11B 700

Patent

active

056361963

ABSTRACT:
An optical disc apparatus which expands the PLL pulling frequency range, and shortens the time required to start PLL pulling, by a simple construction. The linear velocity detection signal V.sub.e2 which is sent from the linear velocity detecting means 11 is added to the controlling voltage V.sub.e1 at the adding means 10, and sent to the voltage controlled oscillator 9 of the PLL circuit 6.

REFERENCES:
patent: 4841511 (1989-06-01), Suzuki et al.
patent: 5161142 (1992-11-01), Okano
patent: 5170386 (1992-12-01), Tateishi
patent: 5315571 (1994-05-01), Maeda et al.
patent: 5444687 (1995-08-01), Okumura

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