Patents by Inventor Tingbo He

Tingbo He 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).

  • Filtering method for digital phase lock loop
    Patent number: 6819730
    Abstract: A filtering method for digital phase lock loop, comprises defining an ideal phase difference value between an input clock and a local recovery clock; calculating a phase difference between the input clock and the local recovery clock by a subtractor; and comparing the phase difference with the ideal phase difference value to adjust the local recovery clock to keep its phase difference stable in the ideal phase difference value. When adjusting the local recovery clock, taking the ideal phase difference value as a center, the phase difference is divided into different segments. For segments where the ideal phase difference value is located, the local recovery clock follows the phase difference with a minimum changing rate; and for segments farther apart from the ideal phase difference value, the local recovery clock follows the phase difference with a faster changing rate.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: November 16, 2004
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Tingbo He
  • Filtering method for digital phase lock loop
    Publication number: 20030021371
    Abstract: A filtering method for digital phase lock loop, comprises defining an ideal phase difference value between an input clock and a local recovery clock; calculating a phase difference between the input clock and the local recovery clock by a subtractor; and comparing the phase difference with the ideal phase difference value to adjust the local recovery clock to keep its phase difference stable in the ideal phase difference value. When adjusting the local recovery clock, taking the ideal phase difference value as a center, the phase difference is divided into different segments. For segments where the ideal phase difference value is located, the local recovery clock follows the phase difference with a minimum changing rate; and for segments farther apart from the ideal phase difference value, the local recovery clock follows the phase difference with a faster changing rate.
    Type: Application
    Filed: July 26, 2002
    Publication date: January 30, 2003
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Tingbo He