Head polarity detection algorithm and apparatus

Details Head polarity detection algorithm and apparatus Head polarity detection algorithm and apparatus

2006-11-07

2006-11-07

Young, Wayne (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

Reexamination Certificate

active

07133227

ABSTRACT:
A method of determining and monitoring head polarity of data heads comprises performing a head polarity detection routine. The head polarity detection routine comprises the step of setting a read gate period duration to a first value. The routine also comprises searching for a good address mark signal during a first read gate period with a channel polarity set to a first polarity. The routine further comprises identifying a polarity of a data head based upon the channel polarity when the good address mark is detected.

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“Signal Processing for Single and Dual Element Unshielded Magnetoresistive Heads” by Koren, IEEE Transactions on Magnetiics, vol. 31, No. 2 Mar. 1995.
“Modulation Codes for the COntrolled Polarity Channel” by Swanson, IEEE Transactions on Magnetics, vol. 32, No. 5, Sep. 1996.

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