Patents by Inventor Heliang MA

Heliang MA 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).

  • Load modulation circuit for radio frequency identification
    Patent number: 9665820
    Abstract: A load modulation circuit for radio frequency identification including a first load modulation module and a second load modulation module connected to a coupling circuit. Under weak field intensity, load modulation is mostly realized by the first load modulation module, with the second load modulation module contributing far less than the first load modulation module as regards to the load modulation waveform and load modulation depth. As field intensity increases, the first load modulation module contributes less and less to the load modulation waveform and load modulation depth. While field intensity increases, the second load modulation module contributes more and more to the load modulation waveform and load modulation depth under the control of a variable voltage. Under strong filed intensity, load modulation is mostly realized by the second load modulation module.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: May 30, 2017
    Assignee: Shanghai Huahong Integrated Circuit Co., LTD.
    Inventors: Zhijun Fu, Heliang Ma
  • A LOAD MODULATION CIRCUIT FOR RADIO FREQUENCY IDENTIFICATION
    Publication number: 20160224881
    Abstract: A load modulation circuit for radio frequency identification including a first load modulation module and a second load modulation module connected to a coupling circuit. Under weak field intensity, load modulation is mostly realized by the first load modulation module, with the second load modulation module contributing far less than the first load modulation module as regards to the load modulation waveform and load modulation depth. As field intensity increases, the first load modulation module contributes less and less to the load modulation waveform and load modulation depth. While field intensity increases, the second load modulation module contributes more and more to the load modulation waveform and load modulation depth under the control of a variable voltage. Under strong filed intensity, load modulation is mostly realized by the second load modulation module.
    Type: Application
    Filed: October 16, 2014
    Publication date: August 4, 2016
    Applicant: Shanghai Huahong Integrated Circuit Co., Ltd.
    Inventors: Zhijun FU, Heliang MA