System for creating, reading and writing on rotatable informatio

Details System for creating, reading and writing on rotatable informatio System for creating, reading and writing on rotatable informatio

1998-02-13

2000-08-29

Tran, Thang V.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 50, G11B 509

Patent

active

061118303

ABSTRACT:
In a system for writing a plurality of information tracks between adjacent portions of a reference track on a rotatable medium, advantage is taken of the fact that laser beam dithering a cross an edge of a reference track produces signals which are analyzable to determine much more exact radial positions. Reading of a certain number, N, of bits during a known period of time, T, permits the determination of the linear or angular velocity of the disk. Knowledge of this value permits its much more precise control.

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