Patents by Inventor Gregory B. Arndt

Gregory B. Arndt 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).

  • Drive signal control for resonating elements
    Patent number: 9823072
    Abstract: In some implementations, a control system for a resonating element comprises: a resonating element being driven by an oscillating drive signal and configured to generate a sense signal proportional to an amplitude of motion; a phase comparator coupled to the resonating element and to an oscillating drive signal, the phase comparator configured to compare the sense signal and the oscillating drive signal and to generate an error signal proportional to the phase difference; an oscillator coupled to the phase comparator and configured for generating the oscillating drive signal, the oscillator configured to receive the error signal and to adjust a phase of the oscillating signal based on the error signal; and an automatic gain control coupled to the resonating element and the oscillator, the automatic gain control configured to adjust the gain of the oscillating drive signal based on the signal generated by the resonating element.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: November 21, 2017
    Assignee: Apple Inc.
    Inventors: Gregory B. Arndt, Christopher C. Painter
  • DRIVE SIGNAL CONTROL FOR RESONATING ELEMENTS
    Publication number: 20170089701
    Abstract: In some implementations, a control system for a resonating element comprises: a resonating element being driven by an oscillating drive signal and configured to generate a sense signal proportional to an amplitude of motion; a phase comparator coupled to the resonating element and to an oscillating drive signal, the phase comparator configured to compare the sense signal and the oscillating drive signal and to generate an error signal proportional to the phase difference; an oscillator coupled to the phase comparator and configured for generating the oscillating drive signal, the oscillator configured to receive the error signal and to adjust a phase of the oscillating signal based on the error signal; and an automatic gain control coupled to the resonating element and the oscillator, the automatic gain control configured to adjust the gain of the oscillating drive signal based on the signal generated by the resonating element.
    Type: Application
    Filed: September 25, 2015
    Publication date: March 30, 2017
    Applicant: APPLE INC.
    Inventors: Gregory B. Arndt, Christopher C. Painter