Patents by Inventor Joanne Mistler

Joanne Mistler 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).

  • Frequency discriminator with fiber optic delay line
    Patent number: 5340980
    Abstract: A microwave oscillator is shown to include an oscillator having an output and a control port and a feedback circuit disposed between the output and the control port of the oscillator. The feedback circuit includes a modulated laser, having an input and an output, the input responsive to a portion of a signal from the output of the oscillator and a photo detector having an input and an output, the input of the photo detector responsive to a signal from the output of the modulated laser delayed by a predetermined amount of time. The feedback circuit further includes a detector having a first and a second input and an output, the first input of the detector responsive to a signal from the output of the photo detector, the second input responsive to a portion of the signal from the output of the oscillator shifted in phase to be in phase quadrature with the signal at the first input of the detector and the output of the detector coupled to the control port of the oscillator.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: August 23, 1994
    Assignee: Raytheon Company
    Inventors: Michael J. Bianchini, Richard A. Michalik, John A. Chiesa, Joanne Mistler
  • Microwave oscillator with noise degeneration feedback circuit
    Patent number: 5220292
    Abstract: A microwave oscillator is shown to include an oscillator having an output and a control port and a feedback circuit disposed between the output and the control port of the oscillator. The feedback circuit includes a modulated laser, having an input and an output, the input responsive to a portion of a signal from the output of the oscillator and a photo detector having an input and an output, the input of the photo detector responsive to a signal from the output of the modulated laser delayed by a predetermined amount of time. The feedback circuit further includes a detector having a first and a second input and an output, the first input of the detector responsive to a signal from the output of the photo detector, the second input responsive to a portion of the signal from the output of the oscillator shifted in phase to be in phase quadrature with the signal at the first input of the detector and the output of the detector coupled to the control port of the oscillator.
    Type: Grant
    Filed: January 2, 1992
    Date of Patent: June 15, 1993
    Assignee: Raytheon Company
    Inventors: Michael J. Bianchini, Richard A. Michalik, John A. Chiesa, Joanne Mistler