Patents by Inventor Ki Ueda

Ki Ueda 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: 20060013349
    Abstract: A recovery circuit may include a phase detector, a quadrant decision unit, a quadrant controller, a charge pump unit, and a phase interpolator. The phase detector may compare a phase of input data with a phase of a current output clock to generate first up signal and first down signal and the quadrant decision unit may determine the phase location for the current output clock and output quadrant decision signals based on a phase location. The quadrant controller may output a second up signal and a second down signal based on the first up signal and the first down signal and the quadrant decision signals, and the charge pump unit may output a first and second phase control voltage based on the second up signal and the second down signal. The phase interpolator may select clocks from a plurality of clocks based on the quadrant decision signals and output an output clock signal based on the selected clocks.
    Type: Application
    Filed: July 13, 2005
    Publication date: January 19, 2006
    Inventors: Hwa Koh, Ki Ueda, Duck Chang, Nyun Kim, Dae Jeong