Patents by Inventor Onis Cogburn

Onis Cogburn 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).

  • Asymmetrical digital subscriber line (ADSL) line driver circuit
    Patent number: 5825819
    Abstract: A differential amplifier (40) receives a low level ADSL signal IN- and IN+ and produces an amplified differential signal. A pair of differential amplifiers (42, 44) receives the differential signal and provides phase shifting and further amplification to the differential signal. A set of differential pairs (46, 48, 50, 52) are coupled to the pair of differential amplifiers (42, 44) and provide further amplification and drive capability to the differential signal. A pair of driver pairs 54 and 56 are coupled to the differential pairs (46, 48, 50, 52) to provide a fully differential output signal OUT- and OUT+ with high linearity. A common mode feedback stage (58) and gain feedback stage (98) provide feedback.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: October 20, 1998
    Assignee: Motorola, Inc.
    Inventor: Onis Cogburn