Combined DC restoration double detection and loops

Details Combined DC restoration double detection and loops Combined DC restoration double detection and loops

2007-08-08

2011-10-25

Chaudry, M. Mujtaba (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S795000

Reexamination Certificate

active

08046666

ABSTRACT:
A method of double detection in a perpendicular magnetic read channel is disclosed. The method generally includes the steps of (A) generating an intermediate signal by performing a first detection on an input signal of the perpendicular read channel, the first detection having a first error rate, (B) generating a statistics signal based on the intermediate signal, the statistics signal conveying noise statistics that depend on data in the input signal and (C) generating an output signal by performing a second detection on the input signal using the noise statistics to reduce a second error rate of the second detection compared with the first error rate, wherein the first detection is independent of the second detection.

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patent: 2005/0044474 (2005-02-01), Zaboronski et al.

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