Disk drive control circuit and method

Details Disk drive control circuit and method Disk drive control circuit and method

2008-09-02

2008-09-02

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077070

Reexamination Certificate

active

11391185

ABSTRACT:
A servo control circuit provides seamless transition between seek and track modes while enabling both rapid seek mode operation and accurate tracking. The control circuit includes an analog-to-digital converter having a non-linear characteristic. The non-linear characteristic provides disproportionately large control voltages to derive speed and settling in the seek mode and essentially linear control voltages in the track mode to provide low noise and accurate tracking operation.

REFERENCES:
patent: 5072318 (1991-12-01), Yu
patent: 5268800 (1993-12-01), Nielsen
patent: 5774299 (1998-06-01), Baum et al.
patent: 6054828 (2000-04-01), Hill
patent: 6489911 (2002-12-01), O'Dwyer
patent: 6580579 (2003-06-01), Hsin et al.

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