Patents by Inventor Philip Theodore Gianos

Philip Theodore Gianos 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).

  • Butler oscillator
    Patent number: 3996530
    Abstract: An amplitude limiting amplifier followed by a filter network is interposed between the voltage amplification stage and the impedance matching stage in a Butler oscillator. This allows both the voltage amplification stage and the impedance matching stage to be operated in a linear mode at all times which assures that a piezoelectric crystal connected between the stages is connected in a relatively low, constant impedance path and is driven by a sinusoidal waveform, free of distortion, to assure maximum frequency stability.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: December 7, 1976
    Assignee: International Business Machines Corporation
    Inventors: Claude Herbert Feistel, Philip Theodore Gianos