Track crossing apparatus and method using the difference between

Details Track crossing apparatus and method using the difference between Track crossing apparatus and method using the difference between

1992-11-17

1994-06-21

Pascal, Robert J.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, G11B 1722

Patent

active

053233689

ABSTRACT:
To accomplish both fast track access and low power consumption in an apparatus for recording or reading out a signal onto or from a track of a recording medium. The actuator control apparatus uses a tracking error signal (TES), which is a signal whose level varies, with the time taken for a pickup to cross one track being used as a cycle. It detects the velocity of the pickup from the time interval (Ti) of the mean level crossing by TES, and provides an actuator with a signal having a pulse width (Tf) proportional to the time interval of the mean level crossing by TES, in synchronization with the crossing of the mean level by TES.

REFERENCES:
patent: 4730298 (1988-03-01), Takahashi
patent: 4731771 (1988-03-01), Maeda et al.
patent: 5182736 (1993-01-01), Yanagi
patent: 5191566 (1993-03-01), Yamaguchi et al.
patent: 5225253 (1993-10-01), Kagami et al.
patent: 5241522 (1993-08-01), Yanagi
IBM Technical Disclosure Bulletin "Digital Sector Servo System" vol. 22, No. 6, Nov. 1979, pp. 2476-2481.

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