Patents by Inventor Jianpei Zhu

Jianpei Zhu 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).

  • Primary-side feedback controlled AC/DC converter with an improved error amplifier
    Patent number: 9130469
    Abstract: An error amplifier, a controller using the error amplifier, and a primary-side feedback controlled AC/DC converter using the controller are discussed. When the output voltage of the primary-side feedback controlled AC/DC converter according to present invention changes, the alternating current path enjoys a fast response and adjusts the output voltage quickly with a lower precision, avoiding large voltage fluctuate, then the direct current path functions slowly to reduce equivalent output error. In such a way, the output voltage precision is enhanced while the stability of the primary-side feedback controlled AC/DC converter is maintained.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: September 8, 2015
    Assignee: FREMONT MICRO DEVICES (SZ) LIMITED
    Inventor: Jianpei Zhu
  • PRIMARY-SIDE FEEDBACK CONTROLLED AC/DC CONVERTER WITH AN IMPROVED ERROR AMPLIFIER
    Publication number: 20130181772
    Abstract: An error amplifier, a controller using the error amplifier, and a primary-side feedback controlled AC/DC converter using the controller are discussed. When the output voltage of the primary-side feedback controlled AC/DC converter according to present invention changes, the alternating current path enjoys a fast response and adjusts the output voltage quickly with a lower precision, avoiding large voltage fluctuate, then the direct current path functions slowly to reduce equivalent output error. In such a way, the output voltage precision is enhanced while the stability of the primary-side feedback controlled AC/DC converter is maintained.
    Type: Application
    Filed: September 11, 2012
    Publication date: July 18, 2013
    Applicant: FREMONT MICRO DEVICES (SZ) LIMITED
    Inventor: Jianpei Zhu