Patents by Inventor Robert S. D'Angelo

Robert S. D'Angelo 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).

  • Patent number: 4167748
    Abstract: Disclosed is a monolithic transistor circuit for high voltage applications. A high impedance bleed resistor is effectively provided across the emitter-base junction of one of the transistors. This is accomplished by placing the base regions of this and another transistor at a selected distance apart so that the zero bias depletion regions of the bases overlap to produce a punch through condition resulting in a desired current density therebetween when an external bias is supplied. The devices thus produced have a high current carrying capacity with low leakage currents.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: September 11, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Robert S. D'Angelo, Adrian R. Hartman, Peter W. Shackle