Patents by Inventor Tony Caviglia

Tony Caviglia 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).

  • Phase locked loop with adaptive phase error compensation
    Patent number: 7579886
    Abstract: An adaptive phase-locked loop (PLL) circuit produces an output signal having a frequency in reference to the frequency of a reference signal. The PLL circuit includes an oscillator configured to generate the output signal according to a frequency control signal, and a processing circuit configured to generate a feedback signal deriving from the output signal. An adjustable shift circuit is provided to time-shift the feedback signal. The PLL further includes a phase comparison circuit configured to generate a phase error signal indicating a phase error between the time-shifted feedback signal and the reference signal, and a control circuit configured to generate the frequency control signal based on the phase error signal. The adjustable shift circuit adjusts a time-shift amount to time-shift the feedback signal according to the phase error signal.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: August 25, 2009
    Assignee: Cadence Design Systems, Inc.
    Inventors: Michael M. Hufford, Eric Naviasky, Tony Caviglia
  • PHASE LOCKED LOOP WITH ADAPTIVE PHASE ERROR COMPENSATION
    Publication number: 20080136532
    Abstract: An adaptive phase-locked loop (PLL) circuit produces an output signal having a frequency in reference to the frequency of a reference signal. The PLL circuit includes an oscillator configured to generate the output signal according to a frequency control signal, and a processing circuit configured to generate a feedback signal deriving from the output signal. An adjustable shift circuit is provided to time-shift the feedback signal. The PLL further includes a phase comparison circuit configured to generate a phase error signal indicating a phase error between the time-shifted feedback signal and the reference signal, and a control circuit configured to generate the frequency control signal based on the phase error signal. The adjustable shift circuit adjusts a time-shift amount to time-shift the feedback signal according to the phase error signal.
    Type: Application
    Filed: December 7, 2006
    Publication date: June 12, 2008
    Applicant: Cadence Design Systems, Inc.
    Inventors: Michael M. HUFFORD, Eric Naviasky, Tony Caviglia