Han Ngoc Nguyen

US Patent:

7174475, Feb 6, 2007

Filed:

Feb 16, 2001

Appl. No.:

09/785604

Inventors:

Hyun Lee - Ladera Ranch CA, US
Han Nguyen - Allentown PA, US
Lai Q. Pham - San Diago CA, US

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

G06F 1/04

US Classification:

713503, 713400, 713600, 327233

Abstract:

A method and apparatus are disclosed for dynamically reducing clock skew among various nodes on an integrated circuit. The disclosed clock skew reduction technique dynamically estimates the clock delay to each node and inserts a corresponding delay for each node such that the clock signals arriving at each node are all in phase with a global clock (or 180 out of phase). Delays attributable to both the wire RC delays and the clock buffer delays are addressed. A feedback path for the clock signal associated with each node allows the round trip travel time of the clock signal to be estimated. When the length of the feedback path matches the length of the primary clock path, the clock skew present at the corresponding node can be estimated as fifty percent (50%) of the round trip delay time. Dynamic adjustments to the delay control circuit are permitted as operating conditions shift. Clock signals arriving at individual nodes on the integrated circuit remain in phase with the global PLL clock (PCK), regardless of variations in the operating voltage or temperature (or both).

US Patent:

8519254, Aug 27, 2013

Filed:

Apr 8, 2008

Appl. No.:

12/099291

Inventors:

James Ping Huang - Huntington Beach CA, US
Ching-Fen Tsai - Cypress CA, US
Han V. Nguyen - Buena Park CA, US
Mark Allen Cleveland - Westminster CA, US
Jimmy M. Quiambao - Walnut CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

H01L 35/32

US Classification:

136230, 136205, 136208

Abstract:

A mobile device for generating electrical power may include a combustion chamber and a heat sink. A TEC module is in thermal communication with the combustion chamber and the heat sink to transfer thermal energy from the combustion chamber to the heat sink. A heat flux across the TEC module causes electrical power to be generated. The mobile device may also include a fuel delivery system to feed fuel into the combustion chamber. A control system may be included to at least monitor and control delivery of fuel to the combustion chamber by the fuel delivery system and to control a temperature gradient across the TEC module to control the electrical power produced by the thermal-to-electric energy conversion device.

US Patent:

20100326097, Dec 30, 2010

Filed:

Jun 30, 2009

Appl. No.:

12/495416

Inventors:

Han V. Nguyen - Buena Park CA, US
Martin E. Lozano - Whittier CA, US

International Classification:

F25D 3/10
F17C 9/00
F17C 13/08

US Classification:

62 98, 62 501, 62 532, 62430

Abstract:

A method for densifying liquid methane is described. The method includes passing the liquid methane through a liquid nitrogen bath, self-pressurizing a container associated with the liquid nitrogen bath through boil off of the liquid nitrogen within the container, and regulating pressure within the liquid nitrogen container to maintain a boiling point of the liquid nitrogen above the triple point temperature of the liquid methane passing through the liquid nitrogen bath.

US Patent:

20130306126, Nov 21, 2013

Filed:

Jul 24, 2013

Appl. No.:

13/949470

Inventors:

Ching-Fen Tsai - Cypress CA, US
Han V. Nguyen - Buena Park CA, US
Mark Allen Cleveland - Westminster CA, US
Jimmy M. Quiambao - Walnut CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

H01L 35/32

US Classification:

136208

Abstract:

A mobile device for generating electrical power may include a combustion chamber and a heat sink. A TEC module is in thermal communication with the combustion chamber and the heat sink to transfer thermal energy from the combustion chamber to the heat sink. A heat flux across the TEC module causes electrical power to be generated. The mobile device may also include a fuel delivery system to feed fuel into the combustion chamber. A control system may be included to at least monitor and control delivery of fuel to the combustion chamber by the fuel delivery system and to control a temperature gradient across the TEC module to control the electrical power produced by the thermal-to-electric energy conversion device.