Patents Assigned to C-COR.net Corporation
  • Lossy linearizers for analog optical transmitters
    Patent number: 7208992
    Abstract: System and method for even order and odd order nonlinear distortion of a compensating signal that removes substantially all of the nonlinear distortion in one order or in two orders. Two or more diodes are arranged in at least one of an anti-series configuration and an anti-parallel configuration in which a circuit voltage is equal to a selected odd order and/or to a selected even order in current, plus higher order terms that are often negligible. The diodes may be replaced by other selected nonlinear devices.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: April 24, 2007
    Assignee: C-COR.net Corporation
    Inventors: Somnath Mukherjee, Yahsing Yuan, Mridul K. Pal
  • Adaptive filter for reducing ingress noise in CATV return signals
    Patent number: 6757910
    Abstract: An adaptive high pass filter is used to reduce signal noise such as that occurring on a CATV upstream carrier. A signal detector senses a lowest active frequency on a CATV transmission. A high pass filter is then adjusted to cut off transmissions at frequencies below the lowest active frequency. This reduces ingress noise present in the upstream channel.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: June 29, 2004
    Assignee: C-Cor.Net Corporation
    Inventor: Dan Bianu
  • Linearization circuits and methods
    Patent number: 6055278
    Abstract: A predistortion circuit and method provides signals to oppose and cancel an anticipated phase and frequency distortion in a coupled electrical system. The predistortion circuitry includes first and second subcircuits which include opposing diodes, providing 180 degree out-of-phase and in-phase signals to produce second, third and higher order predistortion outputs.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: April 25, 2000
    Assignee: C-COR.net Corporation
    Inventors: Ching Ho, Abraham Y. Jou, Nelson M. Shen