Marvell International Limited

Mats Öberg

Jin Xie

Devices, methods, and other embodiments associated with adjusting a defect threshold are described. In one embodiment, a method includes determining, using a defect threshold, when a read channel has read data from a defective portion of a storage medium. The defect threshold is adjusted based, at least in part, on a gain value and a delayed gain value of a gain loop of the read channel.

Adjusting a defect threshold

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.

DC-control for post processor

Methods, algorithms, software, circuits, architectures, and systems for conditionally encoding information and processing conditionally encoded information. The present invention takes advantage of codes where most randomly selected data units fulfill the coding constraints. Thus, only those data units that need encoding (i.e., that do not fulfill coding constraints) are encoded, and those data units that do not need encoding (i.e., that fulfill coding constraints) are not encoded. By doing so, one may increase the density, bandwidth and/or gain of data communications, increase the error checking and/or correcting capabilities of a data communications system, and/or reduce interference in a multi-user system.

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Cupertino, CA, United States of America

Mats Öberg