Patrick J Lee

US Patent:

6405342, Jun 11, 2002

Filed:

Sep 10, 1999

Appl. No.:

09/393511

Inventors:

Patrick J. Lee - San Jose CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G06F 1110

US Classification:

714792, 714795

Abstract:

A disk storage system is disclosed employing an improved retry operation. The disk drive comprises a disk for storing a data block, and a head for reading the data block to generate an analog read signal during an initial read operation. A sampler samples the analog read signal to generate a sequence of read signal sample values, and a multiple-input sequence detector detects an initial estimated data sequence from the read signal sample values during the initial read operation. A reliability metrics generator generates reliability metrics representing an estimated reliability for data in the initial estimated data sequence, and the reliability metrics are stored in a local memory. During a retry operation, a memory controller transfers the reliability metrics generated during the initial read operation to the multiple-input sequence detector which generates a retry estimated data sequence using the reliability metrics, whereby the reliability metrics improves the probability of accurately detecting the retry estimated data sequence.

US Patent:

6604220, Aug 5, 2003

Filed:

Sep 28, 2000

Appl. No.:

09/675853

Inventors:

Patrick J. Lee - San Jose CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11C 2900

US Classification:

714769, 714794, 714755

Abstract:

A disk drive is disclosed comprising a multiple-input sequence detector for detecting an estimated data sequence from a sequence of read signal sample values. The multiple-input sequence detector comprises a first iterative detector and a second iterative detector. An error correction code (ECC) decoder decodes the estimated data sequence into at least one decoded codeword comprising a plurality of bits which are used as reliability metrics for biasing at least one of the iterative detectors.

US Patent:

6694477, Feb 17, 2004

Filed:

Sep 28, 2000

Appl. No.:

09/675852

Inventors:

Patrick J. Lee - San Jose CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

H03M 1300

US Classification:

714784, 714755, 714795

Abstract:

A communication channel is disclosed comprising a trellis sequence detector for detecting an estimated data sequence from signal sample values. A post processor detects and corrects an error event of the trellis sequence detector by remodulating the estimated data sequence into a sequence of expected sample values, computing samples errors as the difference between the expected samples and signal samples, and correlating the sample errors with error event samples. The communication channel further comprises a Reed-Solomon error correction code (ECC) decoder for decoding a Reed-Solomon codeword in the estimated data sequence in response to the detected error event.

US Patent:

6977791, Dec 20, 2005

Filed:

Mar 22, 2003

Appl. No.:

10/395051

Inventors:

Jun Zhu - Palo Alto CA, US
Alex Moraru - Aptos CA, US
Teodor Zanetti - Sunnyvale CA, US
Franklin Tao - Union City CA, US
Dan L. Kilmer - Seiad Valley CA, US
Harald Hess - La Jolla CA, US
Tom Carr - Leucadia CA, US
Matt Bellis - Santa Rosa CA, US
Gustavo A. Pinto - Belmont CA, US
Patrick Rodney Lee - San Diego CA, US

Assignee:

KLA-Tencor Technologies Corporation - Milpitas CA

International Classification:

G11B021/02

US Classification:

360 75, 360 7703, 360 7811

Abstract:

A system and methods for efficiently performing media writing functions is disclosed. The system and methods include: detecting media movement with respect to a base and heads during reading and writing, and moving the heads in response; using an interferometer, such as a dual beam differential interferometer, to dynamically monitor disk position and address perceived errors; and minimizing repeatable and non repeatable runout error by writing data, such as servo bursts, in multiple revolutions to average adverse runout conditions. The present system has the ability to use an interferometer to enhance media certification and perform on line, in situ monitoring of the media, and includes shrouding, head mounting, disk biasing, and related mechanical aspects beneficial to media writing.

US Patent:

6978335, Dec 20, 2005

Filed:

Jun 8, 2001

Appl. No.:

09/878007

Inventors:

Patrick S. Lee - Milpitas CA, US

Assignee:

02Micro International Limited - Grand Cayman

International Classification:

G06F013/14

US Classification:

710305, 710306, 710313, 713600, 725 6

Abstract:

A smart card virtual hub combines a ISO7816 compliant smart card reader interface with a USB hub that provides one or more attachment points for connection of devices to the USB bus, thereby interfacing such devices to the host computer. The hub in the presently preferred embodiment of the invention provides one port to which one USB functional device, such as a keyboard, may be attached. The attached keyboard shares a common USB bus bandwidth with the internal embedded smart card reader through a host-scheduled, token-based communication protocol that is handled by the USB driver and the device driver.

US Patent:

7149574, Dec 12, 2006

Filed:

Sep 12, 2003

Appl. No.:

10/661368

Inventors:

Anthony Joonkyoo Yun - Palo Alto CA, US
Patrick Yuarn-Bor Lee - Piedmont CA, US

Assignee:

Palo Alto Investors - Palo Alto CA

International Classification:

A61N 1/00

US Classification:

607 2

Abstract:

Methods are provided for treating a subject for a condition caused by an abnormality in the subject's autonomic nervous system. In accordance with the subject methods, at least a portion of a subject's autonomic nervous system is electrically modulated to increase the parasympathetic activity/sympathetic activity ratio in a manner that is effective to treat the subject for the condition. Certain embodiments include electrically modulating at least a portion of a subject's autonomic nervous system by inhibiting and/or increasing activity in at least a portion of the subject's autonomic nervous system. The subject methods find use in the treatment of a variety of different conditions, where such conditions include various disease conditions. Also provided are systems and kits for use in practicing the subject methods.

US Patent:

7337259, Feb 26, 2008

Filed:

Dec 19, 2005

Appl. No.:

11/311004

Inventors:

Patrick S. Lee - Milpitas CA, US

Assignee:

02Micro International Limited - Georgetown Grand Cayman

International Classification:

G06F 13/14

US Classification:

710305, 710306, 710313, 713600, 725 6

Abstract:

A smart card virtual hub combines an ISO7816 compliant smart card reader interface with a USB hub that provides one or more attachment points for connection of devices to the USB bus, thereby interfacing such devices to the host computer. The hub in the presently preferred embodiment of the invention provides one port to which one USB functional device, such as a keyboard, may be attached. The attached keyboard shares a common USB bus bandwidth with the internal embedded smart card reader through a host-scheduled, token-based communication protocol that is handled by the USB driver and the device driver.

US Patent:

7450636, Nov 11, 2008

Filed:

Sep 5, 2002

Appl. No.:

10/235357

Inventors:

Patrick J. Lee - San Jose CA, US
William W. Brown - Los Altos CA, US

Assignee:

Avago Technologies General IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H03H 7/30

US Classification:

375232

Abstract:

An adaptive transmit equalizer for equalizing digital symbols to be transmitted over a communications channel includes a transmit filter having an associated register for storing at least one filter coefficient. A tuning engine generates performance metric values based on digital symbols received through the communications channel. The tuning engine is configured to identify at least one filter coefficient based on the performance metric values using a simplex algorithm. The tuning engine is configured to communicate the at least one updated filter coefficient to the transmit filter for storage in the register.