Method for causing a light beam to jump from an initial track to

Details Method for causing a light beam to jump from an initial track to Method for causing a light beam to jump from an initial track to

1995-06-05

1997-07-22

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, G11B 700

Patent

active

056509847

ABSTRACT:
A method and apparatus for jumping from an initial track to a target track on a medium having tracks of alternating polarity uses a combination of two-track and one-track jumps to jump to the target track. Detection of the jump middle-point for a two-track jump includes detecting a zero crossing in a tracking error signal. Detection of the jump middle-point for a one-track jump includes detecting a zero-crossing in a differential signal generated according to the tracking error signal. A target track several tracks away may be reached using consecutive two-track jumps, and if necessary, a single one-track jump.

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