Patents by Inventor Madana K. N. Rao

Madana K. N. Rao 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).

  • Amplifier with extended output drive capability
    Patent number: 4588961
    Abstract: An operational amplifier is provided with at least one output supplementary stage and current mirror amplifiers for coupling amplified signal current variations to drive supplementary output stage source and sink transistors. Those transistors have their internal collector-emitter paths directly connected between supply rails and perform further amplification of the signals. A current source circuit is employed for so limiting those signal current variations that, after the further amplification, circuit devices will not be damaged.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: May 13, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Madana K. N. Rao