Patents by Inventor Sung M. Kang

Sung M. Kang 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).

  • Optical communications and interconnection networks having opto-electronic switches and direct optical routers
    Patent number: 5610744
    Abstract: A multiple wavelength optical network includes a plurality of nodes, each of which can receive and transmit multiple wavelengths. The nodes include at least one fixed wavelength switched optical coupler and at least one direct coupler, so that the signals of high volume and other users can pass directly through the nodes without interruption. Wavelengths can be reused, even when there is a direct connection, by saturating a series of amplifiers in a direct coupler to erase the information signal from the carrier. The carrier signal is not interrupted, and can be remodulated immediately with another information signal.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: March 11, 1997
    Assignee: Board of Trustees of the University of Illinois
    Inventors: Steven H. Ho, Evandro Conforti, Sung M. Kang
  • Data shifting and rotating apparatus
    Patent number: 4396994
    Abstract: A circuit for rotating a multibit binary word in either the right or the left direction includes a scale factor decoder receiving a scale factor word which specifies the magnitude of the rotation and a direction control signal which specifies the direction of rotation and providing a shift control word which is the same as the scale factor word when a right rotation is specified but providing a shift control word which is the complement of the scale factor word when a left rotation is specified. The circuit also includes a plurality of input buffers receiving an input word and providing corresponding input data, and a one-bit rotator receiving the input data and the direction control signal and rotating the input data in the right direction by one position when a left rotation is specified or providing the input data without rotation when a right rotation is specified.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: August 2, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Sung M. Kang, Robert H. Krambeck
  • Data shifting and rotating apparatus
    Patent number: RE33664
    Abstract: .[.A circuit for rotating a multibit binary word in either the right or the left direction includes a scale factor decoder receiving a scale factor word which specifies the magnitude of the rotation and a direction control signal which specifies the direction of rotation and providing a shift control word which is the same as the scale factor word when a right rotation is specified but providing a shift control word which is the complement of the scale factor word when a left rotation is specified. The circuit also includes a plurality of input buffers receiving an input word and providing corresponding input data, and a one-bit rotator receiving the input data and the direction control signal and rotating the input data in the right direction by one position when a left rotation is specified or providing the input data without rotation when a right rotation is specified.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: August 13, 1991
    Assignee: AT&T Bell Laboratories
    Inventors: Sung M. Kang, Robert H. Krambeck, Alfred Y. Kwan