Track-follow control device

Details Track-follow control device Track-follow control device

1998-01-15

1999-09-28

Huber, Paul W.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4435, 360 7704, G11B 700, G11B 5596

Patent

active

059599529

ABSTRACT:
A track-follow control device uses a positional error signal representing the positional error between a target track on a recording medium and a head for recording information to or reproducing information from the recording medium. The track-follow control device controls an actuator to follow the target track by means of a signal from a sub-controller for outputting a correction signal by using its gain circuit for performing gain correction in accordance with an output result from a main-controller for outputting a positioning control signal to the actuator and a band-pass filter for allowing the passage of a predetermined frequency of the positional error signal. The sub-controller extracts only an eccentric frequency, which prevents the correction signal from breaking.

REFERENCES:
patent: 5121374 (1992-06-01), Barton et al.
patent: 5539714 (1996-07-01), Andrews, Jr. et al.
patent: 5742573 (1998-04-01), Hajjar et al.

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