Patents by Inventor Barry R. Allen

Barry R. Allen 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).

  • Voltage controlled push-push oscillator with parallel resonant tank circuits
    Patent number: 5231361
    Abstract: The present invention resides in a push-push voltage controlled oscillator (VCO) utilizing parallel LC resonant tank circuits for improved phase noise characteristics. The push-push VCO of the present invention includes two voltage controlled oscillators connected in parallel and in phase opposition, with each oscillator including a transistor connected in series with the parallel LC resonant tank circuit. The oscillators operate at the same resonant frequency f.sub.0, but are 180 degrees out of phase. Therefore, the fundamental and odd harmonics of the resonant frequency f.sub.0 cancel each other out and the even harmonics add together to produce an output signal at twice the resonant frequency f.sub.0.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: July 27, 1993
    Assignee: TRW Inc.
    Inventors: Duncan M. Smith, Barry R. Allen