Hitachi Global Storage Technologies Netherlands B.v.

Avago Technologies General IP (singapore) Pte. Ltd.

Lsi Corporation

Hgst Netherlands, B.v.

Other

International Business Machines Corporation

Seagate Technology Incorporated

Avago Technologies International Sales Pte. Limited

Bruce Alexander Wilson

Mario Blaum

Shaohua Yang

Richard Leo Galbraith

Ksenija Lakovic

Travis Roger Oenning

Haitao Xia

George Mathew

Zvonimir Z Bandic

Bruce Alvin Gurney

Jongseung Park

Jorge Campello De Souza

Thomas R Albrecht

Yang Han

Yuan Xing Lee

Richard Rauschmayer

Patrick Braganca

Richard M H New

Ivana Djurdjevic

Jefferson E Singleton

Peter John Windler

Fan Zhang

Erich Franz Haratsch

Neil Smith

Ming Jin

Johnson Yen

Ross Wilson

Rehan Ahmed Zakai

Richard New

Evangelos Stavros Eleftheriou

Shu Li

Roy Daron Cideciyan

Thomas Mittelholzer

Zongwang Li

Cyril Guyot

Weijun Tan

Jonathan Darrel Coker

Yu Kou

Bernhard E Knigge

Jeffrey Paul Grundvig

Chung-Li Wang

Satoshi Yamamoto

Hideki Sawaguchi

Lu Lu

Roger William Wood

Michael Anthony Moser

Xuebin Wu

Gary Allan Herbst

Nayak Ratnakar Aravind

Eui Seok Hwang

Madhusudan Kalluri

Seongwook Jeong

Richard Michael Hamilton New

Jorge Campello

Steven L Cochran

Rui Cao

Robert Fontana

Mohammad Shafiul Mobin

Jeffrey Alan Kusnitz

Stefan Maat

Ching Hwa Tsang

Martin Aureliano Hassner

Anatoli Aleksandrovich Bolotov

Bruno Jean Marchon

Marco Sanvido

Ernesto Esteban Marinero

Fu-Ying Huang

Peter Michael Baumgart

Manfred Ernst Schabes

Jihoon Park

Ricardo Ruiz

Dan Liu

Jun Xiao

Jason P Brenden

Xiao Z Wu

Kelly K Fitzpatrick

Spencer W Ng

Mason Lamar Williams

Andreas Moser

James Terrence Olson

David Timothy Flynn

Scott M Dziak

Haotian Zhang

Cameron Carroll Rabe

Charles Mathew Mate

Jeffrey A Gleason

Jianzhong Huang

Kirk Hwang

Lu Pan, Sr

Brian Harry Marcus

Mantle M Yu

Kazuhiro Saito

Thiruvilwamalai Venkatraman Raman

Scott O'Brien

Jaydip Bhaumik

Suharli Tedja

Keke Liu

Keenan Terrell O'Brien

Martin Chen

Charles Raymond Davis

An apparatus for decoding data includes a data decoding circuit configured to decode data encoded with an irregular low density parity check code based on a parity check matrix with non-uniform column weights, and at least one scaling circuit configured to scale values in the data decoding circuit with a scaling value that is dependent at least in part on a column weight of the likelihood values being scaled.

Irregular low density parity check processing system with non-uniform scaling

A memory system, non-volatile solid-state memory, and a method of efficiently reading data from a flash memory array are disclosed. The disclosed memory system includes a flash memory array having a plurality of memory cells that store data therein, each of the plurality of memory cells being configured to store at least two bits per cell and being organized into pages, and a controller configured to read any bit of data from a page of the flash memory array by applying a single threshold voltage to the flash memory array. Reading data from the flash memory array with a single threshold greatly decreases the latency associated with the read operation.

Multi-level flash storage device with minimal read latency

An apparatus for two-dimensional magnetic recording includes an array reader comprising a number of read sensors configured to read data from at least one track on a storage medium, a number of two-dimensional equalizer circuits each comprising inputs for receiving signals derived from each of the read sensors, each comprising an equalized output, and a number of iterative inter-track interference cancellation circuits, each operable to cancel inter-track interference in a different one of the equalized outputs from the two-dimensional equalizer circuits.

Multi-track data readers with iterative inter-track interference cancellation

A storage system includes a magnetic write head, a magnetic storage medium, a write data circuit having a write data output and a magnet length signal output, and a preamplifier that receives the write data and a magnet length signal from the write data circuit, and sets at least one write current characteristic through the magnetic write head based at least in part on the magnet length signal. The write data circuit processes write data to be recorded on the magnetic storage medium by the magnetic write head. The magnet length signal output communicates magnet lengths in the write data.

Magnetic recording system with ternary pattern dependent write signaling

Embodiments are related to systems and methods for data processing, and more particularly to systems and methods for enhancing margin in a serial data transfer.

Systems and methods for serial data transfer margin increase

A storage system includes a magnetic storage medium, a magnetic write head, a channel circuit and a preamplifier. The channel circuit includes a write data input, a differentiated edge emphasis signal generator, a write data output and a differentiated edge emphasis signal output. The preamplifier includes a write data input configured to receive write data from the channel circuit write data output, an edge emphasis signal input configured to receive a differentiated edge emphasis signal from the channel circuit differentiated edge emphasis signal output, and a write current edge emphasis controller configured to generate a write current to the magnetic write head based at least in part on the write data and on the differentiated edge emphasis signal.

Magnetic recording system including differentiated write current emphasis signal generator circuit

A storage system includes a magnetic write head, a magnetic storage medium, a channel circuit comprising a write data output, wherein the channel circuit is operable to process write data to be recorded on the magnetic storage medium by the magnetic write head, and a preamplifier operable to receive the write data from the channel circuit, wherein the preamplifier comprises a number of register pages configured to store pattern dependent write current characteristics for a variety of magnet lengths, and wherein the preamplifier is operable to retrieve the write current characteristics based on magnet lengths and to record data bits on the magnetic storage medium using the write current characteristics.

Magnetic recording system using pattern dependent writer having register pages for storing write currents

The present inventions are related to systems and methods for storing data, and more particularly to systems and methods for writing data to a storage device.

Systems and methods for dynamically programming a flash memory device

A data detector includes a branch metric calculator operable to calculate branch metrics for transitions between states in a trellis for the data detector, and a pruning circuit operable to prune prohibited states from the trellis. The states in the trellis comprise basic states and extended states, where the extended states have a greater number of bits than the basic states.

Data detector with extended states

Aspects of the disclosure pertain to a system and method for providing component detector switching for a diversity loop detector. Switching between component detectors is performed via one of: a periodic state likelihood reset process, a slope-based switching process, or a cross-over connection process. The joint decision circuit switches among component detectors to promote improved performance with present of constant or transition phase offset.

Diversity loop detector with component detector switching

A data processing system includes a data input configured to receive input blocks of data, a memory configured to store the input blocks of data, a data processor configured to process the input blocks of data and to yield corresponding processed output blocks of data and a scheduler configured to cause the data processor to output the output blocks of data after a processing criterion has been met in the data processor. The memory is configured to retain the input blocks of data for reprocessing after the corresponding processed output blocks of data have been output from the data processor. The scheduler includes a control input configured to receive reprocessing requests for the retained input blocks of data. The scheduler is configured to initiate a reprocessing operation in the data processor for the retained blocks of data when the reprocessing requests are received on the control input.

Data processing system with retained sector reprocessing

Systems and methods relating generally to sensing information, and more particularly to systems and methods for utilizing multiple readers to sense information.

Systems and methods for multi-resolution data sensing

Systems, methods, devices, circuits for data processing, and more particularly to data processing including operational marginalization capability. In one case a data processing system is disclosed that includes a loop detector circuit and a sample based noise injection circuit. The loop detector circuit applies a loop detection algorithm to a data input to yield a loop detected output, and the sample based noise injection circuit generates a noise component based at least in part on the loop detected output.

Systems and methods for controlled data processor operational marginalization

Aspects of the disclosure pertain to an apparatus for detecting timing errors including an analog to digital converter circuit, a diversity loop detector and a timing error calculation circuit. The analog to digital converter circuit is operable to convert an input signal into a series of digital samples. The diversity loop detector is operable to apply a data detection algorithm to a plurality of signals derived from the series of digital samples at different phase offsets, to select one of the phase offsets, and to yield a detected output with the selected phase offset. The timing error calculation circuit is operable to calculate a timing error of the analog to digital converter circuit based at least in part on the selected phase offset.

Timing error detector with diversity loop detector decision feedback

Growing community of inventors

San Jose, CA, United States of America

Bruce Alexander Wilson