Patents by Inventor Shirley Pui Shan Lam

Shirley Pui Shan Lam 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).

  • Disabling spread-spectrum clock signal generation
    Patent number: 8724674
    Abstract: A device may generate a clock signal using spread-spectrum clocking. The spread-spectrum clocking may modulate a frequency of the clock signal to produce a plurality of frequencies for the clock signal during a modulation cycle. The device may receive an instruction to disable the spread-spectrum clocking, and may disable the spread spectrum clocking at the end of the modulation cycle.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: May 13, 2014
    Assignees: ATI Technologies ULC, Advanced Micro Devices, Inc.
    Inventors: Michael R. Foxcroft, Shirley Pui Shan Lam, George A. W. Guthrie, Alexander Shternshain, Mihir Doctor, Krishna Sitaraman, Jeff Herman
  • Phase-locked loop frequency stepping
    Patent number: 8692594
    Abstract: A method and a phase-locked loop (PLL) for generating output clock signals with desired frequencies are described. The PLL is equipped with a ramp generator that increments or decrements a feedback divider value before providing it to a modulator. The modulator modulates the feedback divider value and provides the modulated value to a feedback divider of the PLL for performing frequency division.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: April 8, 2014
    Assignees: ATI Technologies ULC, Advanced Micro Devices, Inc.
    Inventors: Michael R. Foxcroft, Shirley Pui Shan Lam, George A. W. Guthrie, Alexander Shternshain, Jeffrey Herman, Mihir S. Doctor, Krishna Sitaraman
  • DISABLING SPREAD-SPECTRUM CLOCK SIGNAL GENERATION
    Publication number: 20140029646
    Abstract: A device may generate a clock signal using spread-spectrum clocking. The spread-spectrum clocking may modulate a frequency of the clock signal to produce a plurality of frequencies for the clock signal during a modulation cycle. The device may receive an instruction to disable the spread-spectrum clocking, and may disable the spread spectrum clocking at the end of the modulation cycle.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 30, 2014
    Applicants: ATI TECHNOLOGIES ULC, ADVANCED MICRO DEVICES, INC.
    Inventors: Michael R. FOXCROFT, Shirley Pui Shan LAM, George A.W. GUTHRIE, Alexander SHTERNSHAIN, Mihir DOCTOR, Krishna SITARAMAN, Jeff HERMAN
  • PHASE-LOCKED LOOP FREQUENCY STEPPING
    Publication number: 20130154694
    Abstract: A method and a phase-locked loop (PLL) for generating output clock signals with desired frequencies are described. The PLL is equipped with a ramp generator that increments or decrements a feedback divider value before providing it to a modulator. The modulator modulates the feedback divider value and provides the modulated value to a feedback divider of the PLL for performing frequency division.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicants: ATI TECHNOLOGIES ULC, ADVANCED MICRO DEVICES, INC.
    Inventors: Michael R. Foxcroft, Shirley Pui Shan Lam, George A. W. Guthrie, Alexander Shternshain, Jeffrey Herman, Mihir S. Doctor, Krishna Sitaraman