Patents by Inventor Jonathan Chung

Jonathan Chung 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).

  • Input buffer for multiple differential I/O standards
    Patent number: 7215143
    Abstract: An input buffer circuit has a plurality of selectively enabled differential amplifier circuits, where each differential amplifier is configured for compatibility with a particular differential I/O standard and its corresponding input operating range. For example, the input buffer may have two differential amplifiers suitable for receiving LVDS differential input signals over a wide input operating range, and another differential amplifier suitable for receiving the PCML differential input signals. One or more control signals are provided to the input buffer, e.g., programmably, to selectively enable the required differential amplifier(s) for a given I/O standard.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: May 8, 2007
    Assignee: Altera Corporation
    Inventors: Jonathan Chung, In Whan Kim, Philip Pan, Chiakang Sung, Bonnie Wang, Xiaobao Wang, Yan Chong, Gopinath Rangan, Khai Nguyen, Tzung-Chin Chang, Joseph Huang
  • Input buffer for multiple differential I/O standards
    Patent number: 6825692
    Abstract: An input buffer circuit has a plurality of selectively enabled differential amplifier circuits, where each differential amplifier is configured for compatibility with a particular differential I/O standard and its corresponding input operating range. For example, the input buffer may have two differential amplifiers suitable for receiving LVDS differential input signals over a wide input operating range, and another differential amplifier suitable for receiving the PCML differential input signals. One or more control signals are provided to the input buffer, e.g., programmably, to selectively enable the required differential amplifier(s) for a given I/O standard.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: November 30, 2004
    Assignee: Altera Corporation
    Inventors: Jonathan Chung, In Whan Kim, Philip Pan, Chiakang Sung, Bonnie Wang, Xiaobao Wang, Yan Chong, Gopinath Rangan, Khai Nguyen, Tzung-Chin Chang, Joseph Huang