Patents by Inventor James Brice

James Brice 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).

  • Timing alignment for power amplifier
    Patent number: 9184704
    Abstract: There is described a method of controlling signal alignment in a power amplifier, comprising: receiving an input signal to be amplified; receiving a supply voltage for the power amplifier, the supply voltage being derived in dependence on the signal to be amplified; amplifying the input signal to produce an output signal; comparing the output signal with a plurality of distorted versions of the input signal, each distorted version of the input signal being associated with a different time delay value; and adjusting the timing of either the input signal or the supply voltage by an amount in dependence on a time delay value determined to be associated with a distorted version of the input signal which most closely matches the output signal.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: November 10, 2015
    Assignee: SNAPTRACK, INC.
    Inventor: James Brice
  • TIMING ALIGNMENT FOR POWER AMPLIFIER
    Publication number: 20140218108
    Abstract: There is described a method of controlling signal alignment in a power amplifier, comprising: receiving an input signal to be amplified; receiving a supply voltage for the power amplifier, the supply voltage being derived in dependence on the signal to be amplified; amplifying the input signal to produce an output signal; comparing the output signal with a plurality of distorted versions of the input signal, each distorted version of the input signal being associated with a different time delay value; and adjusting the timing of either the input signal or the supply voltage by an amount in dependence on a time delay value determined to be associated with a distorted version of the input signal which most closely matches the output signal.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: Nujira Limited
    Inventor: James Brice
  • Timing alignment for power amplifier
    Patent number: 8692614
    Abstract: There is described a method of controlling signal alignment in a power amplifier, comprising: receiving an input signal to be amplified; receiving a supply voltage for the power amplifier, the supply voltage being derived in dependence on the signal to be amplified; amplifying the input signal to produce an output signal; comparing the output signal with a plurality of distorted versions of the input signal, each distorted version of the input signal being associated with a different time delay value; and adjusting the timing of either the input signal or the supply voltage by an amount in dependence on a time delay value determined to be associated with a distorted version of the input signal which most closely matches the output signal.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: April 8, 2014
    Assignee: Nujira Limited
    Inventor: James Brice
  • Generation of pre-distortion coefficients
    Patent number: 8648658
    Abstract: There is disclosed a method for generating pre-emphasis coefficients for a pre-emphasis stage of a non-linear distorting device, the method comprising the steps of: capturing, for a given time period, samples of an input signal and samples of an output signal; determining the direction of an error between the captured samples; adjusting the input signal in a direction to reduce the error to generate an estimate of the pre-distorted input signal; generating updated pre-distortion coefficients in dependence on the estimate of the pre-distorted input signal and generated pre-distortion coefficients for one or more previous time periods.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: February 11, 2014
    Assignee: Nujira Limited
    Inventor: James Brice
  • TIMING ALIGNMENT FOR POWER AMPLIFIER
    Publication number: 20120235741
    Abstract: There is described a method of controlling signal alignment in a power amplifier, comprising: receiving an input signal to be amplified; receiving a supply voltage for the power amplifier, the supply voltage being derived in dependence on the signal to be amplified; amplifying the input signal to produce an output signal; comparing the output signal with a plurality of distorted versions of the input signal, each distorted version of the input signal being associated with a different time delay value; and adjusting the timing of either the input signal or the supply voltage by an amount in dependence on a time delay value determined to be associated with a distorted version of the input signal which most closely matches the output signal.
    Type: Application
    Filed: March 16, 2012
    Publication date: September 20, 2012
    Applicant: NUJIRA LIMITED
    Inventor: James Brice
  • Generation of pre-distortion coefficients
    Publication number: 20120154039
    Abstract: There is disclosed a method for generating pre-emphasis coefficients for a pre-emphasis stage of a non-linear distorting device, the method comprising the steps of: capturing, for a given time period, samples of an input signal and samples of an output signal; determining the direction of an error between the captured samples; adjusting the input signal in a direction to reduce the error to generate an estimate of the pre-distorted input signal; generating updated pre-distortion coefficients in dependence on the estimate of the pre-distorted input signal and generated pre-distortion coefficients for one or more previous time periods.
    Type: Application
    Filed: November 16, 2009
    Publication date: June 21, 2012
    Applicant: NUJIRA LIMITED
    Inventor: James Brice