Gang Liu

US Patent:

6984969, Jan 10, 2006

Filed:

Mar 19, 2004

Appl. No.:

10/805459

Inventors:

Gang Liu - Sunnyvale CA, US
Joseph C. Buxton - Palo Alto CA, US

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

G05F 1/40

US Classification:

323286, 323280, 323284, 323303

Abstract:

A voltage regulator includes a linear mode regulator having a high pass filter circuit connected between its output and an output node, and a switch mode regulator having an low pass filter circuit connected between its output and the same output node. The high pass filter passes high frequency AC current provided by the linear mode regulator to the output node and reduces the low frequency AC and DC currents to substantially zero, and the low pass filter prevents the high frequency AC current produced by the linear mode regulator from being drawn by the switch mode regulator and passes the low AC and DC currents provided by the switch mode regulator to the output node. Thus, the present regulator offers the high response speed and low noise of a linear mode regulator, and the high power efficiency and large continuous output current capability of a switch mode regulator.

US Patent:

7171036, Jan 30, 2007

Filed:

Mar 14, 2003

Appl. No.:

10/389475

Inventors:

Gang Liu - Framingham MA, US
Aaron Wallack - Natick MA, US
David Michael - Wayland MA, US

Assignee:

Cognex Technology and Investment Corporation - Mt. View CA

International Classification:

G06K 9/00

US Classification:

382145, 382151, 382168

Abstract:

An image of a semiconductor interconnection pad is analyzed to determine a geometric description of the zone regions of a multiple zone semiconductor interconnection pad. Edge detection machine vision tools are used to extract features in the image. The extracted features are analyzed to derive geometric descriptions of the zone regions of the pad, that are applied in semiconductor device inspection, fabrication, and assembly operations.

US Patent:

7283345, Oct 16, 2007

Filed:

Jul 14, 2004

Appl. No.:

10/891713

Inventors:

Gang Liu - Sunnyvale CA, US

International Classification:

H02H 9/00

US Classification:

361118, 361 35

Abstract:

A printed circuit board trace coupling system for providing high voltage isolation includes a driving circuit, a coupling transformer including a printed circuit board trace, and a receiving circuit.

US Patent:

7943652, May 17, 2011

Filed:

Mar 26, 2009

Appl. No.:

12/411715

Inventors:

Michael D. Shultz - Stow MA, US
Christine Hiu-Tung Chen - Waltham MA, US
Young Shin Cho - Cambridge MA, US
Lei Jiang - Waltham MA, US
Jianmei Fan - Newton MA, US
Gang Liu - Waltham MA, US
Dyuti Majumdar - Cambridge MA, US
Jianke Li - Cambridge MA, US

Assignee:

Novartis AG - Basel

International Classification:

A61K 31/4162
A61K 31/4155
C07D 487/04
C07D 231/10

US Classification:

514403, 514406, 5483601, 5483641

Abstract:

The present teachings relate to compounds of Formula I:The present teachings also provide methods of preparing compounds of Formula I and methods of using compounds of Formula I in treating, inhibiting, or preventing pathologic conditions or disorders mediated wholly or in part by deacetylases.

US Patent:

8050643, Nov 1, 2011

Filed:

May 9, 2008

Appl. No.:

12/118357

Inventors:

Songping Wu - Sunnyvale CA, US
Hua Qian - Fremont CA, US
Gang Liu - Fremont CA, US
King Chun Tsai - San Jose CA, US
Lawrence Tse - Fremont CA, US
Hui-Ling Lou - Sunnyvale CA, US

Assignee:

Marvell International Ltd. - Hamilton

International Classification:

H04B 7/00

US Classification:

4552341, 455254

Abstract:

In a method and system for controlling gain in an RF receiver, an RF signal is analyzed over different attack and decay windows, from which the receiver determines (1) if the signal is in an attack condition with dip values below a threshold level thus indicating a need for increasing signal gain, or (2) if the signal is in a decay condition with threshold values above a threshold level thus indicating a need for decreasing signal gain. The receiver applies attack and decay windows of different sizes and in an asynchronous manner to create a gain control scheme that is insensitive to transient effects such as channel interference and deep fading that affect the intensities of an in-band signal.

US Patent:

8139231, Mar 20, 2012

Filed:

May 1, 2008

Appl. No.:

12/113492

Inventors:

John W. Schwab - Framingham MA, US
Gang Liu - Natick MA, US
David J. Michael - Wayland MA, US

Assignee:

Cognex Corporation - Natick MA

International Classification:

G01B 11/14

US Classification:

356614

Abstract:

A vision system is provided to determine a positional relationship between a photovoltaic device wafer on a platen and a printing element, such as a printing screen, on a remote side of the photovoltaic device wafer from the platen. A source emits ultraviolet light along a path that is transverse to a longitudinal axis of an aperture through the platen, and a diffuser panel is located along that path. A reflector directs the light from the diffuser panel toward the aperture. A video camera is located along the longitudinal axis of the aperture and produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. A band-pass filter is placed in front of the camera to block ambient light. The use of diffused ultraviolet light enhances contrast in the image between the wafer and the printing element.

US Patent:

8149397, Apr 3, 2012

Filed:

Mar 14, 2006

Appl. No.:

11/886390

Inventors:

Luke P. Lee - Orinda CA, US
Yu Lu - Riverside CA, US
Gang L. Liu - Berkeley CA, US
Jaeyoun Kim - Ames IA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01J 3/44

US Classification:

356301

Abstract:

The disclosure relates to metallic nanophotonic crescent structures, or “nanocrescent SERS probes,” that enhance detectable signals to facilitate molecular detections. More particularly, the nanocrescent SERS probes of the disclosure possess specialized geometries, including an edge surrounding the opening that is capable of enhancing local electromagnetic fields. Nanosystems utilizing such structures are particularly useful in the medical field for detecting rare molecular targets, biomolecular cellular imaging, and in molecular medicine.

US Patent:

8162584, Apr 24, 2012

Filed:

Aug 23, 2006

Appl. No.:

11/508551

Inventors:

David J. Michael - Wayland MA, US
James Clark - La Honda CA, US
Gang Liu - Natick MA, US

Assignee:

Cognex Corporation - Natick MA

International Classification:

G06K 9/00
H01L 21/677

US Classification:

414217

Abstract:

The invention provides, in some aspects, a wafer alignment system comprising an image acquisition device, an illumination source, a rotatable wafer platform, and an image processor that includes functionality for mapping coordinates in an image of an article (such as a wafer) on the platform to a “world” frame of reference at each of a plurality of angles of rotation of the platform.