Patents by Inventor Afroz Imam

Afroz Imam 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).

  • Flyback AC-to-DC converter
    Patent number: 9307586
    Abstract: Techniques and corresponding circuitry and drivers are disclosed for improving power factor (PF) and total harmonic distortion (THD) of a flyback power factor correction (PFC) topology operating in transition-mode. In one or more embodiments, the PF and THD are improved by correcting the on-time of the switching element of the flyback PFC topology to actively shape the wave of the PFC input current. In some embodiments, the on-time is corrected using a phase-lock-loop module that synchronizes with the rectified input line voltage signal and a output regulator module that corrects the switch on-time. The control may be implemented using a digital or an analog controller.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: April 5, 2016
    Assignee: OSRAM SYLVANIA Inc.
    Inventors: Afroz Imam, Biju Antony
  • FLYBACK AC-TO-DC CONVERTER
    Publication number: 20140028211
    Abstract: Techniques and corresponding circuitry and drivers are disclosed for improving power factor (PF) and total harmonic distortion (THD) of a flyback power factor correction (PFC) topology operating in transition-mode. In one or more embodiments, the PF and THD are improved by correcting the on-time of the switching element of the flyback PFC topology to actively shape the wave of the PFC input current. In some embodiments, the on-time is corrected using a phase-lock-loop module that synchronizes with the rectified input line voltage signal and a output regulator module that corrects the switch on-time. The control may be implemented using a digital or an analog controller.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 30, 2014
    Applicant: OSRAM SYLVANIA INC.
    Inventors: Afroz Imam, Biju Antony