Xi Chen

US Patent:

6546047, Apr 8, 2003

Filed:

Oct 8, 1999

Appl. No.:

09/415567

Inventors:

Xi Chen - Fremont CA
Bao Lenguyen - San Jose CA
Wen-Chung (Stewart) Wu - Cupertino CA

Assignee:

Altima Communications, Inc. - San Jose CA

International Classification:

H03H 740

US Classification:

375229, 375232, 375233, 333 18

Abstract:

Methods and circuits utilizing a two stage adaptation algorithm to determine the optimal code for an equalizer to compensate a received signal is disclosed. In the first stage, a coarse tuning algorithm is used to choose a range of codes based on the amplitude of the received signal. The chosen codes will be used as reference points in the second stage. In the second stage, a fine tuning algorithm is used to select a code in the range of reference codes determined in stage one. The fine tuning algorithm looks to the status of the data lock signal generated by the clock recovery circuit. If the data lock signal does not indicate a lock, the fine tuning algorithm cycles through the range of reference codes. If the data lock signal indicates a lock, then that particular code is continued to be used for the equalizer.

US Patent:

6963288, Nov 8, 2005

Filed:

Aug 31, 2000

Appl. No.:

09/652477

Inventors:

Michael Sokol - San Jose CA, US
Xi Chen - Fremont CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G08B005/22

US Classification:

34081545, 34081547, 340525, 340500, 340506, 709224, 709220

Abstract:

A programmable LED display system is disclosed. The system includes a programmable controller, a driver operative to generate a control signal in response to a signal provided by the programmable controller, and a display device operative to provide a visual representation of the state of the system in response to the control signal. The system also includes means for determining which state condition is displayed when more than one state condition exists.

US Patent:

7079571, Jul 18, 2006

Filed:

Oct 8, 1999

Appl. No.:

09/415679

Inventors:

Xi Chen - Fremont CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 1/38

US Classification:

375219, 375222, 375312, 370247, 370282, 713310, 713323

Abstract:

A transceiver circuit having 10 mb and 100 mb transmit and receive circuitries using the power saving methods allows for power consumption of the transceiver circuit to be significantly reduced. This is accomplished by providing each defined subcircuit with its own power supply and means of activation and deactivation. However, the method for activating and deactivating digital subcircuits and analog subcircuits are different and therefore different types of control signals and methods are provided. Furthermore, there are two general types of power-saving situations. The first type is near total circuit power-down and the second type is partial circuit power-down. In yet another embodiment, a method for minimizing energy usage during the idle period is utilized.

US Patent:

7124330, Oct 17, 2006

Filed:

Nov 13, 2002

Appl. No.:

10/292581

Inventors:

David Wong - Campbell CA, US
Xi Chen - Fremont CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G06F 11/00

US Classification:

714 43, 709224

Abstract:

The network device includes a transceiver, a pattern generation unit and a pattern recognition unit. The transceiver connects to a communications medium. The pattern generation unit connects to the transceiver. The pattern generation unit is configured to generate a first code word in response to a self-test signal. The pattern recognition unit connects to the communications medium and a network entity. The pattern recognition unit is configured to receive the first code word from the transceiver and to determine whether the first code word includes a loop back pattern. The pattern recognition unit is configured to generate a second code based upon the first code word and to include in the second code word a pattern different from the first code word.

US Patent:

7154407, Dec 26, 2006

Filed:

Aug 31, 2004

Appl. No.:

10/929784

Inventors:

Michael Sokol - San Jose CA, US
Xi Chen - Fremont CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G08B 5/22

US Classification:

34081545, 34081547, 340500, 340506, 340525, 709220, 709224

Abstract:

A programmable LED display system is disclosed. The system includes a programmable controller; a driver operative to generate a control signal in response to a signal provided by the programmable controller; and a display device operative to provide a visual representation of the state of the system in response to the control signal. The system also includes means for determining which state condition is displayed when more than one state condition exists.

US Patent:

7253179, Aug 7, 2007

Filed:

Nov 6, 2003

Appl. No.:

10/705173

Inventors:

Xi Chen - Palo Alto CA, US
Xiaoqi Chen - San Mateo CA, US
Pingchen Fan - Fremont CA, US
Juan Jaen - Burlingame CA, US
Leping Li - Burlingame CA, US
Jeffrey Thomas Mihalic - San Francisco CA, US

Assignee:

Amgen Inc. - Thousand Oaks CA

International Classification:

A61K 31/4745
C07D 471/02

US Classification:

514285, 546 70

Abstract:

Compounds, compositions and methods are provided that are useful in the treatment and/or prevention of a condition or disorder mediated by a G-protein coupled receptor. In particular, the compounds of the invention are useful in the treatment and/or prevention of eating disorders, obesity, anxiety disorders and mood disorders.

US Patent:

7260748, Aug 21, 2007

Filed:

Mar 21, 2006

Appl. No.:

11/384516

Inventors:

David Wong - Campbell CA, US
Xi Chen - Fremont CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G06F 11/00

US Classification:

714 43

Abstract:

The network device includes a transceiver, a pattern generation unit and a pattern recognition unit. The transceiver connects to a communications medium. The pattern generation unit connects to the transceiver. The pattern generation unit is configured to generate a first code word in response to a self-test signal. The pattern recognition unit connects to the communications medium and a network entity. The pattern recognition unit is configured to receive the first code word from the transceiver and to determine whether the first code word includes a loop back pattern. The pattern recognition unit is configured to generate a second code based upon the first code word and to include in the second code word a pattern different from the first code word.

US Patent:

7376179, May 20, 2008

Filed:

Mar 10, 2003

Appl. No.:

10/383571

Inventors:

Xi Chen - Fremont CA, US
Bao Lenguyen - San Jose CA, US
Wen-Chung (Stewart) Wu - Cupertino CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03H 7/30

US Classification:

375229

Abstract:

Methods and circuits utilizing a two stage adaptation algorithm to determine the optimal code for an equalizer to compensate a received signal is disclosed. In the first stage, a coarse tuning algorithm is used to choose a range of codes based on the amplitude of the received signal. The chosen codes will be used as reference points in the second stage. In the second stage, a fine tuning algorithm is used to select a code in the range of reference codes determined in stage one. The fine tuning algorithm looks to the status of the data lock signal generated by the clock recovery circuit. If the data lock signal does not indicate a lock, the fine tuning algorithm cycles through the range of reference codes. If the data lock signal indicates a lock, then that particular code is continued to be used for the equalizer.