Patents by Inventor Scott W. Herrin

Scott W. Herrin 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).

  • Frequency modulated output clock from a digital frequency/phase locked loop
    Patent number: 7482880
    Abstract: A frequency modulated output of a Digital Locked Loop (DLL) is implemented with a Johnson Counter outputting a sample clock and a synchronized digital code at a multiple of the sample clock. The digital code drives a digital-to-analog converter to generate a frequency modulated control signal. The control signal is summed with the center frequency control from the digital locked loop digital filter to provide a frequency modulated center frequency control signal to the DLL oscillator.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: January 27, 2009
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Scott W. Herrin, Chris C. Dao, Patrick M. Falvey, Thomas J. Rodriguez, Jules D. Campbell, Jr.
  • Frequency modulated output clock from a digital phase locked loop
    Patent number: 7420426
    Abstract: A frequency modulated output of a digital locked loop (DLL) is implemented with a Johnson Counter outputting a sample clock and a synchronized digital code at a multiple of the sample clock. The digital code drives a digital-to-analog converter to generate a frequency modulated control signal. The control signal is summed with the center frequency control from the digital locked loop digital filter to provide a frequency modulated center frequency control signal to the DLL oscillator.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: September 2, 2008
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Scott W. Herrin, Chris C. Dao, Patrick M. Falvey, Thomas J. Rodriguez, Jules D. Campbell, Jr.
  • FREQUENCY MODULATED OUTPUT CLOCK FROM A DIGITAL FREQUENCY/PHASE LOCKED LOOP
    Publication number: 20070152766
    Abstract: A frequency modulated output of a Digital Locked Loop (DLL) is implemented with a Johnson Counter outputting a sample clock and a synchronized digital code at a multiple of the sample clock. The digital code drives a digital-to-analog converter to generate a frequency modulated control signal. The control signal is summed with the center frequency control from the digital locked loop digital filter to provide a frequency modulated center frequency control signal to the DLL oscillator.
    Type: Application
    Filed: November 8, 2006
    Publication date: July 5, 2007
    Inventors: SCOTT W HERRIN, Chris C. Dao, Patrick M. Falvey, Thomas J. Rodriguez, Jules D. Campbell