Patents by Inventor Mark M. Smyth

Mark M. Smyth 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).

  • Method and apparatus for PLL with improved jitter performance
    Patent number: 6462623
    Abstract: An apparatus is described comprising a current source and a pair of transistors coupled to the current source. A pair of variable loads are coupled to the pair of transistors such that a first of the pair of transistors drives a first of the pair of variable loads and a second of the pair of transistors drives a second of the pair of variable loads. Each of the pair of variable loads are coupled to a high gain input and a low gain input. Another apparatus is described comprising an oscillator having a high gain input and a low gain input. The oscillator comprises a series of inverters where each inverter output is coupled to the next inverter input in the series. At least one of the inverters comprises a current source and a pair of transistors coupled to the current source.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: October 8, 2002
    Assignee: Parthus Ireland Limited
    Inventors: John M. Horan, John G. Ryan, Mark M. Smyth, David J. Foley