Patents by Inventor Shaolin ZHOU

Shaolin ZHOU 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 locking method and circuit for phase-locked loop
    Patent number: 11641208
    Abstract: A frequency locking method for a phase-locked loop comprises the following steps: S1, a frequency control module controls a numerically controlled oscillator to obtain an maximum output frequency and a minimum output frequency; S2, obtain a minimum frequency ratio and a maximum frequency ratio by means of a time-to-digital converter and the frequency control module; S3, calculate a first frequency control word and a first frequency ratio according to the minimum frequency ratio and the maximum frequency ratio; S4, the frequency control module uses the Newton's iterative method to recalculate a new frequency control word; S5, obtain a new frequency ratio according to the new frequency control word; S6, if the new frequency ratio is within an error range, end iteration and stably output the new frequency control word, and otherwise, jump to step S4.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: May 2, 2023
    Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Zhijian Chen, Ziying Wu, Changjian Zhou, Pengfei Yu, Bin Li, Shaolin Zhou
  • FREQUENCY LOCKING METHOD AND CIRCUIT FOR PHASE-LOCKED LOOP
    Publication number: 20220294459
    Abstract: A frequency locking method for a phase-locked loop comprises the following steps: S1, a frequency control module controls a numerically controlled oscillator to obtain an maximum output frequency and a minimum output frequency; S2, obtain a minimum frequency ratio and a maximum frequency ratio by means of a time-to-digital converter and the frequency control module; S3, calculate a first frequency control word and a first frequency ratio according to the minimum frequency ratio and the maximum frequency ratio; S4, the frequency control module uses the Newton's iterative method to recalculate a new frequency control word; S5, obtain a new frequency ratio according to the new frequency control word; S6, if the new frequency ratio is within an error range, end iteration and stably output the new frequency control word, and otherwise, jump to step S4.
    Type: Application
    Filed: May 11, 2022
    Publication date: September 15, 2022
    Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Zhijian CHEN, Ziying WU, Changjian ZHOU, Pengfei YU, Bin LI, Shaolin ZHOU