DC-control for post processor

Details DC-control for post processor DC-control for post processor

2004-07-26

2009-02-10

Tran, Khai (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

Reexamination Certificate

active

07489750

ABSTRACT:
Systems and techniques relating to interpreting signals on a noisy channel. A direct current (DC) correction can be applied to an input of a post processor outside of a main read path that supplies data detector output to the post processor. A signal processor, such as a read channel transceiver device usable in a magnetic recording system, has a main read path including a signal equalizer and a data detector. A post processor is responsive to the output of the data detector, and a DC control unit applies a DC correction to an input of the post processor outside of the main read path.

REFERENCES:
patent: 6304396 (2001-10-01), Ramalho et al.
patent: 6332205 (2001-12-01), Conway
patent: 6381082 (2002-04-01), Voorman et al.
patent: 6687067 (2004-02-01), Brianti et al.
patent: 6747936 (2004-06-01), Shim
patent: 7286311 (2007-10-01), Oberg et al.
U.S. Appl. No. 10/737,648, filed Dec. 15, 2003, “DC-Offset Compensation Loops for Magnetic Recording System.”
U.S. Appl. No. 10/752,817, filed Jan. 6, 2004 “Method and Apparatus to Limit DC-Level in Coded Data.”

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