Patents by Inventor Jung-Sui KAO

Jung-Sui KAO 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 synthesizing device and automatic calibration method thereof
    Patent number: 10218367
    Abstract: A frequency synthesizing device includes a voltage-controlled oscillator receiving an adjusting signal and generating an output signal according to the adjusting signal. A feedback frequency divider having a plurality of divisor values receives the output signal and generates a feedback signal after performing frequency dividing. An automatic frequency calibration circuit of the frequency synthesizing device includes a first frequency divider receiving a reference frequency, and a second frequency divider receiving the feedback signal. A comparator of the automatic frequency calibration circuit receives and compares outputs from the first frequency divider and the second frequency divider in a predetermined period to generate a comparing result. A state machine outputs the adjusting signal according to the comparing result in a calibration mode.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: February 26, 2019
    Assignee: Raydium Semiconductor Corporation
    Inventors: Jung-Sui Kao, Jri Lee, Li-Yang Chen
  • Frequency Synthesizing Device and Automatic Calibration Method Thereof
    Publication number: 20170324418
    Abstract: A frequency synthesizing device includes a voltage-controlled oscillator receiving an adjusting signal and generating an output signal according to the adjusting signal. A feedback frequency divider having a plurality of divisor values receives the output signal and generates a feedback signal after performing frequency dividing. An automatic frequency calibration circuit of the frequency synthesizing device includes a first frequency divider receiving a reference frequency, and a second frequency divider receiving the feedback signal. A comparator of the automatic frequency calibration circuit receives and compares outputs from the first frequency divider and the second frequency divider in a predetermined period to generate a comparing result. A state machine outputs the adjusting signal according to the comparing result in a calibration mode.
    Type: Application
    Filed: May 5, 2017
    Publication date: November 9, 2017
    Inventors: Jung-Sui KAO, Jri LEE, Li-Yang CHEN