Patents by Inventor John C. Twombly

John C. Twombly 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).

  • Sinusoidal oscillator with instant start-up
    Patent number: 4862113
    Abstract: Initial start up conditions for an oscillator having an inductor and capacitor coupled as a frequency determining resonant circuit are established by current generators. The current levels correlate to the steady state operating levels of the oscillator. Switching elements are actuated so as to gate the oscillator into immediate steady state operation without start up transient distortion by reconfiguring the relationship of the current sources to the oscillator elements.
    Type: Grant
    Filed: January 6, 1988
    Date of Patent: August 29, 1989
    Assignee: International Business Machines Corporation
    Inventors: Otto R. Buhler, Brian A. Simpson, John C. Twombly