Patents by Inventor Kamal Tabatabaje-Alavi

Kamal Tabatabaje-Alavi 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).

  • Heterojunction biopolar mixer circuitry
    Patent number: 6072352
    Abstract: Mixer circuitry having a semiconductor body formed therein mixer circuitry having an oscillator having a heterojunction bipolar transistor and a mixer having a Schottky diode. The heterojunction transistor has a collector region formed in one portion of doped layer of the semiconductor body and the diode has a metal electrode is Schottky contact with another portion of such doped layer. The mixer is includes a diode and a DC biasing circuit, comprising a constant current, for biasing such diode to predetermined operating point substantially invariant with power of an input signal fed to such mixer.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: June 6, 2000
    Assignee: Raytheon Company
    Inventors: Brian J. McNamara, John P. Wendler, Kamal Tabatabaje-Alavi
  • Heterojunction bipoplar mixer circuitry
    Patent number: 6046486
    Abstract: Mixer circuitry having a semiconductor body formed therein mixer circuitry having an oscillator having a heterojunction bipolar transistor and a mixer having a Schottky diode. The heterojunction transistor has a collector region formed in one portion of doped layer of the semiconductor body and the diode has a metal electrode is Schottky contact with another portion of such doped layer. The mixer is includes a diode and a DC biasing circuit, comprising a constant current, for biasing such diode to predetermined operating point substantially invariant with power of an input signal fed to such mixer.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: April 4, 2000
    Assignee: Raytheon Company
    Inventors: Brian J. McNamara, John P. Wendler, Kamal Tabatabaje-Alavi