Servo system for data storage apparatus

Details Servo system for data storage apparatus Servo system for data storage apparatus

G - Physics

11

B

352/21.32

G11B 21/10 (2006.01) G11B 5/596 (2006.01)

Patent

CA 1173958

SERVO SYSTEM FOR DATA STORAGE APPARATUS Abstract of the Disclosure The servo system includes the use of servo signals of four types such that each group of four adjoining servo tracks identifies the center line of a data track of interest and presents unique signals from the respective four servo tracks. The analog value of the signals are stored and sensed to provide a substantially linear position error signal over a three-track wide region. By using variable gain with respect to the analog signals, compensation for the variance between data head width and track pitch, and a quadrature servo portion, linearity can be achieved. In addition, since the substantially linear region is three tracks wide and the position error signal does not become ambiguous over a width of four tracks, a one-track seek can be accomplished using an error signal rather than a seek.

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