Patents by Inventor Chi-Shung David Wang

Chi-Shung David Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8314647
    Abstract: Embodiments of a dynamic leakage control circuit for use with graphics processor circuitry are described. The dynamic leakage control circuit selectively enables back biasing of the transistors comprising the graphics processor circuits during particular modes of operation. The back biasing levels are controlled by two separate power rails. A first power rail is coupled to an existing power supply and the second power rail is coupled to a separate adjustable voltage regulator. A separate voltage regulator may also be provided for the first power rail. A hardware-based state machine or software process is programmed to detect the occurrence of one or more modes of operation and adjust the voltage regulators for the first and second power rails to either enable or disable the back biasing state of the circuit, or alter the threshold voltage of the circuit within a specified voltage range.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: November 20, 2012
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Daniel Shimizu, Chi-Shung David Wang, Qi Chen
  • Publication number: 20110279938
    Abstract: Embodiments of a dynamic leakage control circuit for use with graphics processor circuitry are described. The dynamic leakage control circuit selectively enables back biasing of the transistors comprising the graphics processor circuits during particular modes of operation. The back biasing levels are controlled by two separate power rails. A first power rail is coupled to an existing power supply and the second power rail is coupled to a separate adjustable voltage regulator. A separate voltage regulator may also be provided for the first power rail. A hardware-based state machine or software process is programmed to detect the occurrence of one or more modes of operation and adjust the voltage regulators for the first and second power rails to either enable or disable the back biasing state of the circuit, or alter the threshold voltage of the circuit within a specified voltage range.
    Type: Application
    Filed: June 13, 2011
    Publication date: November 17, 2011
    Applicant: ADVANCED MICRO DEVICES, INC.
    Inventors: Daniel Shimizu, Chi-Shung David Wang, Qi Chen
  • Publication number: 20080197914
    Abstract: Embodiments of a dynamic leakage control circuit for use with graphics processor circuitry are described. The dynamic leakage control circuit selectively enables back biasing of the transistors comprising the graphics processor circuits during particular modes of operation. The back biasing levels are controlled by two separate power rails. A first power rail is coupled to an existing power supply and the second power rail is coupled to a separate adjustable voltage regulator. A separate voltage regulator may also be provided for the first power rail. A hardware-based state machine or software process is programmed to detect the occurrence of one or more modes of operation and adjust the voltage regulators for the first and second power rails to either enable or disable the back biasing state of the circuit, or alter the threshold voltage of the circuit within a specified voltage range.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 21, 2008
    Inventors: Daniel Shimizu, Chi-Shung David Wang, Qi Chen
  • Publication number: 20030089998
    Abstract: A multi-chip module as disclosed herein includes a first semiconductor device, a second semiconductor device and a plurality of device interconnect members. The first semiconductor device is capable of enabling functionality associated with a first circuit segment of an integrated circuit design and includes an array of first device interconnect pads. The second semiconductor device is capable of enabling functionality associated with a second circuit segment of the integrated circuit design and includes an array of second device interconnect pads. Each one of the device interconnect members is electrically connected directly between one of the first device interconnect pads and a corresponding one of the second device interconnect pads.
    Type: Application
    Filed: November 9, 2001
    Publication date: May 15, 2003
    Inventors: Vincent K. Chan, Sam Ho, Chi-Shung David Wang, Gregory C. Buchner