Patents by Inventor Mark Symth

Mark Symth 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).

  • Delta sigma PLL with low jitter
    Patent number: 6044124
    Abstract: A phase lock loop circuit for a digital radio generates the sampling frequency for sampling an incoming signal by storing the samples of the incoming signal in an accumulator at a first frequency. The accumulator is unloaded at the sampling frequency. A microprocessor monitors the rate in which the samples are stored in the accumulator and provides a switching signal to vary the sampling frequency in small increments to prevent the accumulator from overflowing or underflowing.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: March 28, 2000
    Assignee: Silicon Systems Design Ltd.
    Inventors: Peter Monahan, Declan Farrelly, Nial O' hEarcain, John G. Ryan, Mark Symth