Thermal asperity suppression using high speed shorting and basel

Details Thermal asperity suppression using high speed shorting and basel Thermal asperity suppression using high speed shorting and basel

1997-08-29

1999-11-30

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 25, 360 55, 327317, 327551, 327310, G11B 502

Patent

active

059953136

ABSTRACT:
An apparatus and method for suppressing the effects of thermal asperities in readback signals of a hard disc drive are disclosed. A suppression circuit is provided having a clamping path that establishes an electrical short between a readback signal path transmitting the readback signal and a reference line for the readback signal in order to remove substantially all of the energy associated with the thermal asperity from the readback signal. The suppression circuit further includes a compensation path operably coupled between the readback signal path and the reference line to subsequently provide baseline compensation for the readback signal by introducing a non-zero impedance between the readback signal path and the reference line.

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