Anh N Hoang

US Patent:

6572265, Jun 3, 2003

Filed:

Apr 20, 2001

Appl. No.:

09/839857

Inventors:

John P. Gotthold - Sunnyvale CA
Anh N. Hoang - San Jose CA
Surinder S. Sandhu - Santa Clara CA
John Leonard Shaver - San Francisco CA
Terry M. Stapleton - San Jose CA

Assignee:

Luxtron Corporation - Santa Clara CA

International Classification:

G01J 508

US Classification:

374161, 374131, 374208, 385 12, 385147, 2504581, 2504591, 250234, 2505781

Abstract:

A temperature sensor utilizing optical temperature measuring techniques is constructed to make firm contact with a surface whose temperature is being measured, an example application being the monitoring of semiconductor wafers or flat panel displays while being processed. A cap is mounted near but spaced apart from an end of a lightwave guide, with a resilient element that applies force of the cap against a surface whose temperature is being measured as the cap is urged toward the optical fiber end. An optical temperature sensing element, such as luminescent material or a surface of known emissivity, is carried within the cap. A bellows with a closed end conveniently serves as both the cap and the resilient element. An alternative temperature measuring device installs an optical temperature sensing material within a test substrate behind an optical window, and then views the sensing material through the window.

US Patent:

20030206573, Nov 6, 2003

Filed:

May 30, 2003

Appl. No.:

10/452551

Inventors:

John Gotthold - Sunnyvale CA, US
Anh Hoang - San Jose CA, US
Surinder Sandhu - Santa Clara CA, US
John Shaver - San Francisco CA, US
Terry Stapleton - San Jose CA, US

International Classification:

G01J005/00

US Classification:

374/132000, 374/121000, 374/130000

Abstract:

A temperature sensor utilizing optical temperature measuring techniques is constructed to make firm contact with a surface whose temperature is being measured, an example application being the monitoring of semiconductor wafers or flat panel displays while being processed. A cap is mounted near but spaced apart from an end of a lightwave guide, with a resilient element that applies force of the cap against a surface whose temperature is being measured as the cap is urged toward the optical fiber end. An optical temperature sensing element, such as luminescent material or a surface of known emissivity, is carried within the cap. A bellows with a closed end conveniently serves as both the cap and the resilient element. An alternative temperature measuring device installs an optical temperature sensing material within a test substrate behind an optical window, and then views the sensing material through the window.

US Patent:

20130088254, Apr 11, 2013

Filed:

Apr 24, 2012

Appl. No.:

13/454830

Inventors:

Anh T. Hoang - Fremont CA, US
Brian S. Park - San Jose CA, US
Patrick D. McNamara - San Francisco CA, US

International Classification:

G01R 31/26

US Classification:

32476201

Abstract:

A system and method for testing circuits. A generated input voltage waveform for a first phase of a test may use transitions with a voltage swing between expected low and high trigger points for an integrated circuit (IC) with hysteresis. A generated input voltage waveform for a second phase of the test may use transitions with a voltage swing between the expected low trigger point and a high sub-threshold value. The high sub-threshold value may be a tolerable voltage difference below the expected high trigger point. A generated input voltage waveform for a third phase of the test may use transitions with a voltage swing between the expected high trigger point and a low sub-threshold value. The low sub-threshold value may be a tolerable voltage difference above the expected low trigger point. The expected trigger points and sub-threshold values may be found from earlier characterization studies for the IC.

US Patent:

20200281653, Sep 10, 2020

Filed:

Feb 11, 2020

Appl. No.:

16/787320

Inventors:

- Alameda CA, US
Anh Hoang - Alameda CA, US

International Classification:

A61B 18/20
A61B 90/98

Abstract:

The present invention relates generally to surgical lasers and more specifically to a laser beam control and delivery system that accurately and efficiently directs a laser beam into an optical fiber. The laser beam control and delivery system also provides additional functions, including a connection for a fiber tip temperature control system and a tissue temperature sensing system. The present invention also relates to a surgical laser system that has a high efficiency thermoelectric cooling system.

US Patent:

20190101924, Apr 4, 2019

Filed:

Oct 25, 2017

Appl. No.:

15/793291

Inventors:

- San Francisco CA, US
Anh Tuan Hoang - San Francisco CA, US

International Classification:

G05D 1/02
G05D 1/00
B60W 30/095
G08G 1/16

Abstract:

Systems and methods for anomaly detection are provided. In one example embodiment, a computer-implemented method includes obtaining, by a computing system including one or more computing devices, state data indicative of one or more states of one or more objects that are within a surrounding environment of an autonomous vehicle. The method includes determining, by the computing system, an existence of an anomaly within the surrounding environment of the autonomous vehicle based at least in part on the state data indicative of the one or more states of the one or more objects within the surrounding environment of the autonomous vehicle. The method includes determining, by the computing system, a motion plan for the autonomous vehicle based at least in part on the existence of the anomaly within the surrounding environment of the autonomous vehicle.

US Patent:

20170354465, Dec 14, 2017

Filed:

May 16, 2011

Appl. No.:

13/698026

Inventors:

John L. Rink - San Francisco CA, US
Anh Hoang - Alameda CA, US

Assignee:

Xintec Corporation aba Convergent Laser Technolgies - Alameda CA

International Classification:

A61B 18/20
A61B 34/00
A61B 90/98
A61B 18/00

Abstract:

The present invention relates generally to surgical lasers and more specifically to a laser beam control and delivery system that accurately and efficiently directs a laser beam into an optical fiber. The laser beam control and delivery system also provides additional functions, including a connection for a fiber tip temperature control system and a tissue temperature sensing system. The present invention also relates to a surgical laser system that has a high efficiency thermoelectric cooling system.

US Patent:

20150015283, Jan 15, 2015

Filed:

Jul 10, 2013

Appl. No.:

13/938901

Inventors:

- Cupertino CA, US
Patrick D. McNamara - San Francisco CA, US
Kwang M. Lee - Saratoga CA, US
Meng C. Chong - Milpitas CA, US
Geertjan Joordens - Sunnyvale CA, US
Raman S. Thiara - San Jose CA, US
Anh T. Hoang - Fremont CA, US
John P. Gonzalez - San Jose CA, US

International Classification:

G01R 31/319

US Classification:

32475001

Abstract:

A method and apparatus for power glitch detection in IC's is disclosed. In one embodiment, a method includes a detection circuit in an IC detecting a voltage transient wherein a value of a supply voltage has at least momentarily fallen below a reference voltage value. Responsive thereto, the detection circuit may cause a logic value to be stored in a register indicating that the detection circuit has detected the supply voltage falling below the reference voltage. The IC may include a number of detection circuits coupled to the register, each of which may provide a corresponding indication of detecting the supply voltage falling below the reference voltage. The detection circuits may be placed at different locations, and thus reading the register may yield information indicating the locations where, if any, such voltage transients occurred.