Gain control for data-dependent detection in magnetic...

Details Gain control for data-dependent detection in magnetic... Gain control for data-dependent detection in magnetic...

2011-01-04

2011-01-04

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

Reexamination Certificate

active

07864467

ABSTRACT:
Method, apparatus and computer program product adjust gain in a read channel of a magnetic media data storage device. A digital signal sample having a data-dependent noise component is received. A gain value, stored in a location in a gain table, is selected in a data-dependent manner. The gain of the signal sample is adjusted in response to the selected gain value. A bit pattern is detected from the gain-adjusted signal sample and a data output signal is output based upon the detected bit pattern.

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