MR head thermal asperity recovery

Details MR head thermal asperity recovery MR head thermal asperity recovery

1996-10-01

1999-04-27

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 55, 360 65, 360 8, 360 48, 360 67, G11B 509

Patent

active

058985328

ABSTRACT:
A disc drive data recovery system for recovering data from a magnetic disc having asperities is disclosed. The data recovery system includes a magnetoresistive head for reading magnetically encoded data from the magnetic disc and providing in response a signal indicative of the magnetically encoded data. Contact between the magnetoresistive head and an asperity corrupts the signal such that the signal contains thermal asperity noise. The data recovery system includes an asperity recovery filter coupled to the magnetoresistive head for receiving the signal from the magnetoresistive head and reducing the thermal asperity noise in the signal.

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