Alex Chen

US Patent:

7839513, Nov 23, 2010

Filed:

Aug 3, 2004

Appl. No.:

10/910413

Inventors:

Ojeni P. Sammis - Glendale CA, US
Peter S. Fisher - Pasadena CA, US
Lily A. Ray - Altadena CA, US
Alexandra D. Ruegg - La Crescenta CA, US
Alex C. Chen - Arcadia CA, US
Vazrik Israelian - Glendale CA, US
James R. Low - Rochester NY, US
Richard T. Horn - Claremont CA, US
Mike L Justice - Fredericksburg VA, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G06K 15/00

US Classification:

358 114, 358 21, 358 19, 358 15, 382100

Abstract:

A hybrid document automation system manages a hybrid printing job, such as PostScript (PS) job with a mix of color and monochrome (B/W) sheets containing variable data. The print job may contain any number of sets, each differing in size and ratio of color and B/W sheets. The system includes a color printer, a monochrome printer, a print manager, a splitter for separating color pages from monochrome pages in the print job and automatic jam recovery. A graphical user interface (GUI) may be provided to give a user/operator information on the status of the print job. The system may also include a document integrity system for insuring the correct output of the merged color and monochrome pages.

US Patent:

8067992, Nov 29, 2011

Filed:

Jun 6, 2008

Appl. No.:

12/134323

Inventors:

Alex Jianzhong Chen - Irvine CA, US
Gim Eng Chew - Penang, MY
Tong Tee Tan - Johor, MY
Kok Chin Pan - Penang, MY

Assignee:

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

International Classification:

H03K 3/26

US Classification:

331111, 331 66, 331143, 331175, 331176

Abstract:

Disclosed are various embodiments of temperature-compensated relaxation oscillator circuits that may be fabricated using conventional CMOS manufacturing techniques. The relaxation oscillator circuits described herein exhibit superior low temperature coefficient performance characteristics, and do not require the use of expensive off-chip high precision resistors to effect temperature compensation. Positive and negative temperature coefficient resistors arranged in a resistor array offset one another to provide temperature compensation in the relaxation oscillator circuit.

US Patent:

8239709, Aug 7, 2012

Filed:

Aug 12, 2009

Appl. No.:

12/540254

Inventors:

Erwin Hom - Foster City CA, US
Alex Chen - Saratoga CA, US
Robert Parks - Castro Valley CA, US
Jonathan Thatcher - Mountain View CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G06F 11/00

US Classification:

714 381

Abstract:

Methods, program products, and systems for monitoring extrinsic processes are described. A monitoring process can monitor one or more target processes. The target processes can be extrinsic, e. g. , not spawned by the monitoring process. The monitoring process reads a process registry to identify which processes among multiple processes to monitor. The monitoring process can send status requests to the identified target processes periodically to check whether the target processes are healthy. If a target process is terminated, the monitoring process determines whether the termination is normal (e. g. , by a user), or abnormal (e. g. , the target process crashed). The monitoring process can restart the abnormally terminated or hung target process.

US Patent:

8294518, Oct 23, 2012

Filed:

Sep 3, 2010

Appl. No.:

12/807403

Inventors:

Sherif Galal - Irvine CA, US
Alex Jianzhong Chen - Irvine CA, US
Khaled Abdelfattah - Irvine CA, US
Todd L. Brooks - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 3/26

US Classification:

330267, 330265

Abstract:

Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

US Patent:

20070136787, Jun 14, 2007

Filed:

Dec 13, 2005

Appl. No.:

11/301427

Inventors:

Alex Chen - Arcadia CA, US
Rene Robles - Santa Maria CA, US
George Hartupee - Racho Cucamonga CA, US

International Classification:

H04L 9/32

US Classification:

726003000

Abstract:

A method and system are provided for authorizing access to software printing resources stored within a memory of a network printing system. The method and system receive user identification information and a request for access to at least one software printing resource of the software printing resources. A determination is then made whether the user identification information corresponds to an authorized user. If the user identification information corresponds to an authorized user, access is given to the at least one software printing resource stored within the memory, thereby enabling the performance of a print job using the at least one software printing resource.

US Patent:

20130063214, Mar 14, 2013

Filed:

Oct 18, 2012

Appl. No.:

13/655339

Inventors:

Alex Jianzhong Chen - Irvine CA, US
Khaled Abdelfattah - Irvine CA, US
Todd L. Brooks - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 1/38

US Classification:

330291

Abstract:

Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

US Patent:

20130064398, Mar 14, 2013

Filed:

Oct 18, 2012

Appl. No.:

13/655362

Inventors:

Alex Jianzhong Chen - Irvine CA, US
Khaled Abdelfattah - Irvine CA, US
Todd L. Brooks - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 3/16
H03F 99/00
H03F 1/38

US Classification:

381120, 330277, 330291

Abstract:

Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

US Patent:

20210350622, Nov 11, 2021

Filed:

Sep 20, 2018

Appl. No.:

16/136261

Inventors:

Alex C. Chen - La Canada-Flintridge CA, US

International Classification:

G06T 19/00
G02B 27/01
H04M 1/725

Abstract:

A method and apparatus may capture a video of a crowd of people near a first person, transmit the video of the crowd to a second device, and receive, from the second device, an indication that a second person in the crowd appears to be at least one of (a) interested in meeting the first person, and (b) a threat to the first person. A display on the frame may display the received indication to the first person.