Patents Assigned to S3 Incorporated, Inc.
  • Differential charge pump with low voltage common mode feedback circuit
    Patent number: 6515536
    Abstract: A differential charge pump utilizing a common mode feedback circuit. The charge pump includes a dual reference current source and outputs a differential current signal by modifying currents routed to the outputs utilizing current paths having transistors maintained in the linear region within the current paths. The common mode feedback circuit includes differential transistors requiring a maximum power supply voltage of a common mode reference voltage plus a transistor threshold voltage.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: February 4, 2003
    Assignee: S3 Incorporated, Inc.
    Inventors: Guojin Liang, J. Eric Ruetz
  • Differential charge pump with low voltage common mode feedback circuit
    Patent number: 6275097
    Abstract: A differential charge pump utilizing a common mode feedback circuit. The charge pump includes a dual reference current source and outputs a differential current signal by modifying currents routed to the outputs utilizing current paths having transistors maintained in the linear region within the current paths. The common mode feedback circuit includes differential transistors requiring a maximum power supply voltage of a common mode reference voltage plus a transistor threshold voltage.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: August 14, 2001
    Assignee: S3 Incorporated, Inc.
    Inventors: Guojin Liang, J. Eric Ruetz