Patents by Inventor James D. Wordelman

James D. Wordelman 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).

  • Oscillator mode suppression circuit
    Patent number: 6169460
    Abstract: An oscillator circuit suppresses unwanted oscillation frequencies and allows oscillation in the selected frequency band. The circuit has less sensitivity to aging of components that cause a shift in operating frequency. The oscillator includes a first and second inverting amplifier that each have an input terminal and an output terminal. A crystal resonator is connected between the input terminal of the first amplifier and the output terminal of the second amplifier. A suppression trap is connected between the first and second amplifier for suppressing oscillation outside the desired range of frequencies. The trap includes a parallel tank circuit that is connected between the output terminal of the first amplifier and the input terminal of the second amplifier. A capacitor is connected between the input terminal of the second amplifier and a ground.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: January 2, 2001
    Assignee: CTS Corporation
    Inventor: James D. Wordelman