Patents by Inventor James Wrigley

James Wrigley 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).

  • Mixed linear/square-root encoded single slope ramp provides a fast, low noise analog to digital converter with very high linearity for focal plane arrays
    Patent number: 8624769
    Abstract: An analog-to-digital converter (ADC) converts pixel voltages from a CMOS image into a digital output. A voltage ramp generator generates a voltage ramp that has a linear first portion and a non-linear second portion. A digital output generator generates a digital output based on the voltage ramp, the pixel voltages, and comparator output from an array of comparators that compare the voltage ramp to the pixel voltages. A return lookup table linearizes the digital output values.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: January 7, 2014
    Assignee: California Institute of Technology
    Inventors: Christopher James Wrigley, Bruce R. Hancock, Kenneth W. Newton, Thomas J. Cunningham
  • MIXED LINEAR/SQUARE-ROOT ENCODED SINGLE SLOPE RAMP PROVIDES A FAST, LOW NOISE ANALOG TO DIGITAL CONVERTER WITH VERY HIGH LINEARITY FOR FOCAL PLANE ARRAYS
    Publication number: 20130038482
    Abstract: An analog-to-digital converter (ADC) converts pixel voltages from a CMOS image into a digital output. A voltage ramp generator generates a voltage ramp that has a linear first portion and a non-linear second portion. A digital output generator generates a digital output based on the voltage ramp, the pixel voltages, and comparator output from an array of comparators that compare the voltage ramp to the pixel voltages. A return lookup table linearizes the digital output values.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 14, 2013
    Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Christopher James Wrigley, Bruce R. Hancock, Kenneth W. Newton, Thomas J. Cunningham
  • Audio equipment
    Patent number: D721062
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: January 13, 2015
    Assignee: Allen & Heath Limited
    Inventors: John Danning, Carey Davies, Ian McBurney, Alex Money, David Price, James Wrigley, Glenn Rogers, Robin Clarke, Simon Trethewey, Mike Williamson
  • Audio equipment
    Patent number: D744983
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: December 8, 2015
    Assignee: Allen & Heath Limited
    Inventors: Glenn Rogers, Robin Clark, Mike Williamson, Carey Davies, James Wrigley, Alex Money, John Danning, David Price, Ian McBurney, Simon Trethewey, David Cook, David Biggs, Niall Dunican, Chris Lock
  • Audio equipment
    Patent number: D745491
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: December 15, 2015
    Assignee: Allen & Heath Limited
    Inventors: Glenn Rogers, Robin Clark, Mike Williamson, Carey Davies, James Wrigley, Alex Money, John Danning, David Price, Ian McBurney, Simon Trethewey, David Cook, David Biggs, Niall Dunican