Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-11-21
2006-11-21
Nguyen, Hoa T. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
07139150
ABSTRACT:
A track follow controller (“TFC”) in an embedded disk controller is provided. The TFC includes, a position error calculator that determines a linear position of a head based on burst format and determines a position error based on the linear position and a target position; and a position error output compensator that receives a position error signal from the position error calculator and filters the position error signal. The burst format includes at least a first burst pair format that includes x bursts and a second burst pair format that includes y bursts, where x is unequal to y. The position error calculator includes a burst selector that can select a burst pair; a linear position calculator that calculates head linear position based on burst pair format; and an error calculator that determines the position error based on the linear position and target position.
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Sandoval Raymond A.
Spaur Michael R.
Habermehl James L
Marvell International Ltd.
Nguyen Hoa T.
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