Patents by Inventor Joseph Karaszewski

Joseph Karaszewski 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).

  • Methods and apparatus for reducing electromagnetic interference resultant from data transmission over a high-speed audio/visual interface
    Patent number: 10462417
    Abstract: Methods and apparatus for reducing electromagnetic interference resultant from data transmission over a high-speed audio/visual interface. In one embodiment, an HDMI source device is disclosed. The HDMI source device includes a wireless interface and an HDMI interface coupled with an active filter circuit topology. The active filter circuit topology includes a pair of differential signal lanes; a passive filter circuit disposed within each of the pair of differential signal lanes; a plurality of active filter circuits, with at least a first active filter circuit disposed on one side of the passive filter circuit and at least a second active filter circuit disposed on the other side of the passive filter circuit; a plurality of diodes, with each of the plurality of active filter circuits coupled with a respective diode; and switching logic coupled with the plurality of diodes. Methods of operating the HDMI source device and HDMI systems are also disclosed.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: October 29, 2019
    Assignee: Apple Inc.
    Inventors: William Cornelius, In Jae Chung, Bryan Follis, Pierre Michael, Kofi Boateng, Jongbae Park, Joseph Karaszewski
  • METHODS AND APPARATUS FOR REDUCING ELECTROMAGNETIC INTERFERENCE RESULTANT FROM DATA TRANSMISSION OVER A HIGH-SPEED AUDIO/VISUAL INTERFACE
    Publication number: 20190068918
    Abstract: Methods and apparatus for reducing electromagnetic interference resultant from data transmission over a high-speed audio/visual interface. In one embodiment, an HDMI source device is disclosed. The HDMI source device includes a wireless interface and an HDMI interface coupled with an active filter circuit topology. The active filter circuit topology includes a pair of differential signal lanes; a passive filter circuit disposed within each of the pair of differential signal lanes; a plurality of active filter circuits, with at least a first active filter circuit disposed on one side of the passive filter circuit and at least a second active filter circuit disposed on the other side of the passive filter circuit; a plurality of diodes, with each of the plurality of active filter circuits coupled with a respective diode; and switching logic coupled with the plurality of diodes. Methods of operating the HDMI source device and HDMI systems are also disclosed.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 28, 2019
    Inventors: William Cornelius, In Jae Chung, Bryan Follis, Pierre Michael, Kofi Boateng, Jongbae Park, Joseph Karaszewski