Yong Kang Li

US Patent:

7274758, Sep 25, 2007

Filed:

Feb 2, 2004

Appl. No.:

10/768073

Inventors:

Xu Zhou - Sunnyvale CA, US
Yong Li - Sunnyvale CA, US

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H03D 1/00

US Classification:

375343, 375344

Abstract:

An OFDM receiver has an autocorrelation circuit configured for generating an autocorrelation result from samples of received short preamble symbols in a received data packet, where the autocorrelation circuit generates each autocorrelation result based on accumulation of the samples having been received for the short preamble symbols. Hence, by using all received samples of the short preamble symbols, the autocorrelation based on accumulated samples minimizes the effect of noise and provides a more accurate coarse frequency estimation result.

US Patent:

7582611, Sep 1, 2009

Filed:

May 2, 2006

Appl. No.:

11/416519

Inventors:

Yaoquan Liu - Castro Valley CA, US
Christopher Carreras - Belmont CA, US
David C. Myles - Kensington CA, US
Yong Li - Palo Alto CA, US
Simon James Shaw - San Francisco CA, US
Hong Fu - Union City CA, US
Yue Chen - Hayward CA, US
Hao Zheng - Hayward CA, US
Yandong Li - San Jose CA, US
Mark A. Burlingame - Oakland CA, US

Assignee:

Pfizer Inc. - New York NY

International Classification:

A61K 31/70
C07H 17/08

US Classification:

514 29, 536 72, 536 73, 536 74

Abstract:

Compounds having a structure according to formula (I).

US Patent:

7640548, Dec 29, 2009

Filed:

Jun 21, 2002

Appl. No.:

10/177534

Inventors:

Jai Yu - Fremont CA, US
Karn Choi - Seattle WA, US
Stephan Otto Brunner - Lafayetta CA, US
Do Joon Ra - Mountain View CA, US
Guo Chew Lam - Foster City CA, US
Aibek Musaev - San Mateo CA, US
Ashley Grant Stirrup - Burlingame CA, US
Tarri E. Furlong - San Leandro CA, US
Yong Li - Fremont CA, US

Assignee:

Siebel Systems, Inc. - San Mateo CA

International Classification:

G06F 9/46
G06F 3/00

US Classification:

718106, 705 8, 705 9, 715708, 715751, 715753

Abstract:

A facility for guiding users through a series of steps or tasks, often associated with a process, is described. The facility assigns tasks or steps to users having roles identified with the task or step. The role associated with the task or step may change depending on the state of the task or step. When the role associated with a task or step changes, the facility may assign the task or step to another user. The facility guides a user through a task or step by providing instructions and other information, such as data tables and user input fields, that may be used to complete the task or step. The facility provides for the definition of processes by allowing users to specify tasks, steps and instructions relating to processes.

US Patent:

7885627, Feb 8, 2011

Filed:

Jul 7, 2003

Appl. No.:

10/612954

Inventors:

Christine Lee - Mountain View CA, US
Yong Li - Sunnyvale CA, US

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04B 1/06

US Classification:

4552411, 4552321, 4552341

Abstract:

An OFDM wireless transceiver uses a digital automatic gain control (AGC) module. The digital AGC module is configured for setting a gain to an initial gain value for mapping a received wireless signal to a first power value for an input circuit having a prescribed input range. The initial gain value is set relative to the prescribed input range and a prescribed signal to noise ratio. If the digital AGC module determines that the first power value of the received wireless signal does not exceed the prescribed input range, the digital AGC module calculates an optimum gain for the received wireless signal relative to the initial gain value and the first power value; if the first power value exceeds the prescribed input range, the AGC module determines the optimum gain based on setting the gain to a minimum gain value.

US Patent:

7955824, Jun 7, 2011

Filed:

May 9, 2008

Appl. No.:

12/118432

Inventors:

John R. Carney - Hayward CA, US
Yong Li - Hayward CA, US
Hugo Menzella - Hayward CA, US
Ralph C. Reid - Hayward CA, US

Assignee:

Kosan Biosciences Incorporated - Princeton NJ

International Classification:

C12P 17/06

US Classification:

435125, 549292, 549417, 558250, 558254

Abstract:

The invention provides novel compounds that may be used as intermediates in the preparation of epothilones, epothilone analogs and derivative, as well as new synthetic methods for producing the intermediates and products.

US Patent:

7974107, Jul 5, 2011

Filed:

Aug 27, 2008

Appl. No.:

12/199471

Inventors:

Yong Li - Campbell CA, US
Junjie Zheng - Santa Clara CA, US
Liang Yan - Campbell CA, US
John Kesterson - San Jose CA, US
Xiao Yan Wang - Pleasanton CA, US

Assignee:

iWatt Inc. - Los Gatos CA

International Classification:

H02M 3/335

US Classification:

363 2101, 363 2108, 363 2116, 363 2112

Abstract:

A hybrid constant current control system that uses both pulse width modulation (PWM) and pulse frequency modulation (PFM) control. When transitioning from constant voltage mode to constant current mode the present invention can continue to control using PWM. Thereafter, when the voltage has dropped, the present invention smoothly transitions to PFM mode. The point of transition is based upon the switching frequency and the lowest rated voltage of operation. The system and method avoids very short (narrow) Ton times which ensures accurate constant current (CC) control with bipolar junction transistor (BJT) devices. The present invention also avoids acoustic noise because the switching frequency is maintained at a high enough level to avoid such acoustic noise even when the energy transferred through the transformer is still substantial and the output voltage is not too low. In addition the output current limit is insensitive to variation in the inductance-input voltage ratio, and is minimized against leakage inductance.

US Patent:

8030503, Oct 4, 2011

Filed:

May 9, 2008

Appl. No.:

12/117876

Inventors:

Yue Chen - Hayward CA, US
Yong Li - Palo Alto CA, US

Assignee:

Kosan Biosciences Incorporated - Princeton NJ

International Classification:

C07D 309/30

US Classification:

549292

Abstract:

Intermediates in the preparation of epothilones and epothilone analogs are provided along with synthetic methods useful in the synthesis of epothilone compounds.

US Patent:

8049481, Nov 1, 2011

Filed:

Oct 29, 2009

Appl. No.:

12/608854

Inventors:

Yong Li - Campbell CA, US
Carrie Seim - Campbell CA, US
Junjie Zheng - Santa Clara CA, US
John W. Kesterson - San Jose CA, US
Liang Yan - Milpitas CA, US
Clarita Poon - Pleasanton CA, US
Fuqiang Shi - Cupertino CA, US

Assignee:

iWatt Inc. - Los Gatos CA

International Classification:

G05F 1/575
H02M 3/335

US Classification:

323283, 323284, 363 2105, 363 2113

Abstract:

Adaptive multi-mode digital control schemes that improve the light-load efficiency (and thus the overall average efficiency) in switch-mode power converters without causing performance issues such as audible noises or excessive voltage ripples. Embodiments include a switch-mode power converter that reduces current in the power converter using a second pulse-width-modulation (PWM) mode before reaching switching frequencies that generate audible noises. As the load across the output of the power converter is reduced, the power converter transitions from a first PWM mode in high load conditions to a first pulse-frequency-modulation (PFM) mode, then to a second PWM mode, and finally to a second PFM mode. During the second PFM mode, the switching frequency is dropped to audible frequency levels. Current in the power converter, however, is reduced in the second PWM mode before transitioning to the second PFM mode.