Patents by Inventor Anthony Koon Wong

Anthony Koon Wong 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).

  • Calibration methods and circuits for optimized on-die termination
    Patent number: 7408378
    Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a transmitter die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains the termination resistances for the signal transmission lines. The ODT control system derives a number of calibration currents from precision voltage and resistance references and distributes the reference currents to a number of transmitters. Each transmitter then derives an ODT calibration signal using the respective reference current and another precision resistor, and then employs the calibration signal to calibrate local termination elements. Distributing calibrated currents provides excellent noise immunity, while limiting the requisite number of external voltage references reduces cost.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: August 5, 2008
    Assignee: Rambus Inc.
    Inventors: Scott C. Best, Anthony Koon Wong, David Leung
  • Calibration methods and circuits for optimized on-die termination
    Patent number: 6980020
    Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a transmitter die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains the termination resistances for the signal transmission lines. The ODT control system derives a number of calibration currents from precision voltage and resistance references and distributes the reference currents to a number of transmitters. Each transmitter then derives an ODT calibration signal using the respective reference current and another precision resistor, and then employs the calibration signal to calibrate local termination elements. Distributing calibrated currents provides excellent noise immunity, while limiting the requisite number of external voltage references reduces cost.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: December 27, 2005
    Assignee: Rambus Inc.
    Inventors: Scott C. Best, Anthony Koon Wong, David Leung