Weighted linearization of a position error signal in a disc driv

Details Weighted linearization of a position error signal in a disc driv Weighted linearization of a position error signal in a disc driv

1996-08-30

2000-04-04

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7711, G11B 5596

Patent

active

060468793

ABSTRACT:
Apparatus and method for providing a linearized position error signal in a disc drive. A first servo position error signal is generated by the disc drive as a selected combination of servo burst signals received as a disc drive head passes over servo burst fields of a selected track, the first servo position error signal having a magnitude indicative of the position of the head relative to the selected track. A second servo position error signal is also generated by the disc drive as a selected combination of the servo burst signals, the magnitude of the second servo position error signal being different from the magnitude of the first servo position error signal for at least a portion of the width of the selected track. A third servo position error signal is generated as a selectively weighted sum of the first and second servo position error signals, the weighting of the first and second servo position error signals selected to provide the third servo position error signal with nominally constant gain across the width of the selected track. The third servo position error signal is used to generate correction signals which control the amount of current applied to an actuator coil in order to control the position of the head with respect to the selected track.

REFERENCES:
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patent: 5566034 (1996-10-01), Shumaker
patent: 5600506 (1997-02-01), Baum et al.
patent: 5615065 (1997-03-01), Cheung
patent: 5717538 (1998-02-01), Cheung et al.
patent: 5828516 (1998-10-01), Park
patent: 5867341 (1999-02-01), Volz et al.

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