Patents by Inventor Wayne Shepherd

Wayne Shepherd 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).

  • Wireless communication unit, integrated circuit comprising a voltage controlled oscillator and method of operation therefor
    Patent number: 8467748
    Abstract: A wireless communication unit comprises a frequency generation circuit employing a phase locked loop (PLL) circuit comprising a voltage controlled oscillator having a modulation port for directly modulating a signal output from the voltage controlled oscillator. The voltage controlled oscillator is operably coupled to at least one switch and a capacitor bank comprising one or more varactors. A controller is arranged to switch in one or more varactors associated with the modulation port of the phase locked loop circuit to provide an inverse cubic relationship to the direct modulated signal. In addition, or alternatively, the phase locked loop (PLL) circuit may comprise a voltage controlled oscillator having a tuning port for controlling a frequency of a signal output from the voltage controlled oscillator. The controller here is arranged to switch in one or more varactors associated with the tuning port of the phase locked loop circuit in an inverse square relationship.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: June 18, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Niall Kearney, Wayne Shepherd
  • WIRELESS COMMUNICATION UNIT, INTEGRATED CIRCUIT COMPRISING A VOLTAGE CONTROLLED OSCILLATOR AND METHOD OF OPERATION THEREFOR
    Publication number: 20100097110
    Abstract: A wireless communication unit comprises a frequency generation circuit employing a phase locked loop (PLL) circuit comprising a voltage controlled oscillator having a modulation port for directly modulating a signal output from the voltage controlled oscillator. The voltage controlled oscillator is operably coupled to at least one switch and a capacitor bank comprising one or more varactors. A controller is arranged to switch in one or more varactors associated with the modulation port of the phase locked loop circuit to provide an inverse cubic relationship to the direct modulated signal. In addition, or alternatively, the phase locked loop (PLL) circuit may comprise a voltage controlled oscillator having a tuning port for controlling a frequency of a signal output from the voltage controlled oscillator. The controller here is arranged to switch in one or more varactors associated with the tuning port of the phase locked loop circuit in an inverse square relationship.
    Type: Application
    Filed: March 2, 2007
    Publication date: April 22, 2010
    Applicant: Freescale Semiconductor , Inc.
    Inventors: Niall Kearney, Wayne Shepherd