Patents by Inventor Osama Abdel-Rahman

Osama Abdel-Rahman 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).

  • Patent number: 10693381
    Abstract: In some examples, a controller includes a startup generation circuit configured to control, while operating in a first phase of a startup mode, a bridge circuit using peak detection and using zero-crossing detection of an electrical current through a tank circuit coupled to the bridge circuit. The startup generation circuit is also configured to control the bridge circuit using the zero-crossing detection while operating in a second phase of the startup mode after the first phase. The startup generation circuit is further configured to control the bridge circuit using a discontinuous-current mode for the electrical current while operating in a third phase of the startup mode after the second phase. The controller also includes a steady-state generation circuit configured to control the bridge circuit using soft switching while operating in a steady-state mode after the third phase of the startup mode.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: June 23, 2020
    Assignee: Infineon Technologies Austria AG
    Inventor: Osama Abdel-Rahman
  • Publication number: 20200177089
    Abstract: In some examples, a controller includes a startup generation circuit configured to control, while operating in a first phase of a startup mode, a bridge circuit using peak detection and using zero-crossing detection of an electrical current through a tank circuit coupled to the bridge circuit. The startup generation circuit is also configured to control the bridge circuit using the zero-crossing detection while operating in a second phase of the startup mode after the first phase. The startup generation circuit is further configured to control the bridge circuit using a discontinuous-current mode for the electrical current while operating in a third phase of the startup mode after the second phase. The controller also includes a steady-state generation circuit configured to control the bridge circuit using soft switching while operating in a steady-state mode after the third phase of the startup mode.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 4, 2020
    Applicant: Infineon Technologies Americas Corp.
    Inventor: Osama Abdel-Rahman
  • Patent number: 10404182
    Abstract: In some examples, a power converter includes a first bridge circuit, a second bridge circuit, and a transformer, where a first side of the transformer is coupled to the first bridge circuit. The power converter further includes a first LC tank circuit coupled to a second side of the transformer and a second LC tank circuit coupled to the first LC tank circuit and coupled to the second bridge circuit.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: September 3, 2019
    Assignee: Infineon Technologies Americas Corp.
    Inventor: Osama Abdel-Rahman
  • Patent number: 10050443
    Abstract: A total harmonic distortion (THDi) reduction circuit for a power factor correction (PFC) controller to control a PFC stage. The THDi reduction circuit determines whether an input signal, such as an alternating current (AC) line voltage is a high voltage or low voltage signal. For a high voltage input signal, the THDi reduction circuit may limit the duty cycle of a control signal to a PFC stage to minimize a voltage spike at the zero-crossing point of the input signal and thereby minimize THDi. For a low voltage input signal, the THDi reduction circuit may extend the duty cycle of the control signal to the PFC stage, while ensuring that the control signal has at least a predetermined off-time, i.e. the duty cycle is less than 100 percent. Extending the control signal duty cycle, especially for low voltage input signals under high load, may minimize THDi.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: August 14, 2018
    Assignee: Infineon Technologies Austria AG
    Inventor: Osama Abdel-Rahman