Method for checking the quality of servo gray codes

Details Method for checking the quality of servo gray codes Method for checking the quality of servo gray codes

2006-09-26

2006-09-26

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

C360S046000

Reexamination Certificate

active

07113356

ABSTRACT:
A dynamic threshold detector for a servo writer/detector in a magnetic storage system with a magnetic medium comprises a detector that receives data from the magnetic medium and that selects one of a first condition and a second condition based on at least one of an amplitude, a sign and bit transitions of the data. A threshold selector selects a first set of thresholds when the first condition is selected by the detector and a second set of thresholds when the second condition is selected by the detector. The data includes pairs of numbers with a first number and a a second number each having one of a positive sign and a negative sign and wherein the detector selects the first condition when the signs of the pairs are the same and the second condition when the signs of the pairs are different.

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