Patents by Inventor Zaw M. Soe

Zaw M. Soe 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).

  • Fast coarse tuning control for PLL frequency synthesizer
    Patent number: 6597249
    Abstract: The VCO of a synthesizer operates with a coarse tuning and a fine tuning. During the coarse tuning, a binary search method is used to match the VCO frequency to one of a finite number of discrete reference frequencies. The coarse tuning operates without frequency division and phase comparison in a closed feedback loop, thereby speeding up the settling time and increasing the lock-in range. The fine tuning operates as a conventional analog PLL.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: July 22, 2003
    Assignee: Prominenet Communications, Inc.
    Inventors: Hwey-Ching Chien, Ping An, Zaw M. Soe
  • FAST COARSE TUNING CONTROL FOR PLL FREQUENCY SYNTHESIZER
    Publication number: 20030048139
    Abstract: The VCO of a synthesizer operates with a coarse tuning and a fine tuning. During the coarse tuning, a binary search method is used to match the VCO frequency to one of a finite number of discrete reference frequencies. The coarse tuning operates without frequency division and phase comparison in a closed feedback loop, thereby speeding up the settling time and increasing the lock-in range. The fine tuning operates as a conventional analog PLL.
    Type: Application
    Filed: September 4, 2001
    Publication date: March 13, 2003
    Inventors: Hwey-Ching Chien, Ping An, Zaw M. Soe
  • Spread spectrum modulation technique for frequency synthesizers
    Publication number: 20020131541
    Abstract: A spread spectrum modulation technique uses digital control logic to switch back and forth between two feedback divider ratios so that the PLL spreads output clock frequency between two limits determined by the ratios. The spread spectrum control logic can be integrated into any PLL frequency synthesizer.
    Type: Application
    Filed: January 16, 2002
    Publication date: September 19, 2002
    Inventors: Zaw M. Soe, Ewunnet Gebre-Selassie, Mingde Pan
  • Spread spectrum modulation technique for frequency synthesizers
    Patent number: 6351485
    Abstract: A spread spectrum modulation technique uses digital control logic to switch back and forth between two feedback divider ratios so that the PLL spreads output clock frequency between two limits determined by the ratios. The spread spectrum control logic can be integrated into any PLL frequency synthesizer.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: February 26, 2002
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Zaw M. Soe, Ewunnet Gebre-Selassie, Mingde Pan