Patents by Inventor Richard F. C. Kao

Richard F. C. Kao 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).

  • Publication number: 20120235706
    Abstract: A novel driver circuit that uses a differential driver as a design backbone is described. Unlike a conventional differential interface, which typically has two or more outputs for providing an output signal and its complement, one of the differential driver's outputs is coupled to drive an output signal onto a signal line, while another one of the differential driver's outputs is unused and terminated, for instance by coupling the output to package ground or a voltage source via a capacitor. The performance of the driver circuit is significantly improved over conventional singled-ended driver designs.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 20, 2012
    Inventor: Richard F.C. Kao
  • Patent number: 8149013
    Abstract: A novel driver circuit that uses a differential driver as a design backbone is described. Unlike a conventional differential interface, which typically has two or more outputs for providing an output signal and its complement, one of the differential driver's outputs is coupled to drive an output signal onto a signal line, while another one of the differential driver's outputs is unused and terminated, for instance by coupling the output to package ground or a voltage source via a capacitor. The performance of the driver circuit is significantly improved over conventional singled-ended driver designs.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: April 3, 2012
    Inventor: Richard F. C. Kao
  • Publication number: 20100090722
    Abstract: A novel driver circuit that uses a differential driver as a design backbone is described. Unlike a conventional differential interface, which typically has two or more outputs for providing an output signal and its complement, one of the differential driver's outputs is coupled to drive an output signal onto a signal line, while another one of the differential driver's outputs is unused and terminated, for instance by coupling the output to package ground or a voltage source via a capacitor. The performance of the driver circuit is significantly improved over conventional singled-ended driver designs.
    Type: Application
    Filed: June 26, 2009
    Publication date: April 15, 2010
    Inventor: Richard F. C. Kao
  • Patent number: 7679396
    Abstract: Method and apparatus are disclosed for implementing low noise circuits. The method includes providing a first subcircuit and a second subcircuit, where the first subcircuit and the second subcircuit include substantially same circuit elements and have substantially same configuration and layout, providing one or more coupling capacitors configured to couple between a circuit power and a circuit ground that power the first subcircuit and the second subcircuit, providing one or more pairs of differential input signals to the first subcircuit and the second subcircuit, where the first subcircuit receives a differential signal and the second subcircuit receives a complement of the differential signal, operating the first subcircuit and the second subcircuit to generate one or more pairs of differential output signals using the one or more pairs of differential input signals.
    Type: Grant
    Filed: October 4, 2008
    Date of Patent: March 16, 2010
    Inventor: Richard F.C. Kao
  • Patent number: 7554363
    Abstract: A novel driver circuit that uses a differential driver as a design backbone is described. Unlike a conventional differential interface, which typically has two or more outputs for providing an output signal and its complement, one of the differential driver's outputs is coupled to drive an output signal onto a signal line, while another one of the differential driver's outputs is unused and terminated, for instance by coupling the output to package ground or a voltage source via a capacitor. The performance of the driver circuit is significantly improved over conventional singled-ended driver designs.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: June 30, 2009
    Inventor: Richard F. C. Kao
  • Patent number: 7501857
    Abstract: Logic circuits and methods for designing logic circuits are described herein. In one aspect, the logic circuit comprises complimentary logic units. Examples of various complimentary logic circuits, including driver circuits and core logics, are described herein. In another aspect, complimentary logic is implemented in the method of configuring integrated circuits.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: March 10, 2009
    Inventor: Richard F. C. Kao
  • Patent number: 7501858
    Abstract: A novel driver circuit that uses a differential driver as a design backbone is described. Unlike a conventional differential interface, which typically has two or more outputs for providing an output signal and its complement, one of the differential driver's outputs is coupled to drive an output signal onto a signal line, while another one of the differential driver's outputs is unused and terminated, for instance by coupling the output to package ground or a voltage source via a capacitor. The performance of the driver circuit is significantly improved over conventional singled-ended driver designs.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: March 10, 2009
    Inventor: Richard F. C. Kao
  • Patent number: 7102380
    Abstract: A novel driver circuit that uses a differential driver as a design backbone is described. Unlike a conventional differential interface, which typically has two or more outputs for providing an output signal and its complement, one of the differential driver's outputs is coupled to drive an output signal onto a signal line, while another one of the differential driver's outputs is unused and terminated, for instance by coupling the output to package ground or a voltage source via a capacitor. The performance of the driver circuit is significantly improved over conventional singled-ended driver designs.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: September 5, 2006
    Inventor: Richard F. C. Kao