Patents by Inventor Cliff Ellison

Cliff Ellison 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).

  • Measuring output current in a buck SMPS
    Patent number: 10114046
    Abstract: A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (SMPS) at substantially the middle of the low side portion (50 percent point during low side switch ON) of the pulse width modulation (PWM) period. This sample of the current through the SMPS inductor during the low side ON 50% point may be considered as the “average” or “DC output” current of the SMPS, and taken every time at precisely the same low side ON 50%. A constant current source and sink are used to charge and discharge a timing capacitor whose voltage charge is monitored by a high speed voltage comparator to provide precise sample timing.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: October 30, 2018
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Scott Dearborn, Cliff Ellison
  • Measuring Output Current In A Buck SMPS
    Publication number: 20180024171
    Abstract: A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (SMPS) at substantially the middle of the low side portion (50 percent point during low side switch ON) of the pulse width modulation (PWM) period. This sample of the current through the SMPS inductor during the low side ON 50% point may be considered as the “average” or “DC output” current of the SMPS, and taken every time at precisely the same low side ON 50%. A constant current source and sink are used to charge and discharge a timing capacitor whose voltage charge is monitored by a high speed voltage comparator to provide precise sample timing.
    Type: Application
    Filed: October 2, 2017
    Publication date: January 25, 2018
    Applicant: Microchip Technology Incorporated
    Inventors: Scott Dearborn, Cliff Ellison
  • Measuring output current in a buck SMPS
    Patent number: 9778289
    Abstract: A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (SMPS) at substantially the middle of the low side portion (50 percent point during low side switch ON) of the pulse width modulation (PWM) period. This sample of the current through the SMPS inductor during the low side ON 50% point may be considered as the “average” or “DC output” current of the SMPS, and taken every time at precisely the same low side ON 50%. A constant current source and sink are used to charge and discharge a timing capacitor whose voltage charge is monitored by a high speed voltage comparator to provide precise sample timing.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: October 3, 2017
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Scott Dearborn, Cliff Ellison
  • MEASURING OUTPUT CURRENT IN A BUCK SMPS
    Publication number: 20160109488
    Abstract: A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (SMPS) at substantially the middle of the low side portion (50 percent point during low side switch ON) of the pulse width modulation (PWM) period. This sample of the current through the SMPS inductor during the low side ON 50% point may be considered as the “average” or “DC output” current of the SMPS, and taken every time at precisely the same low side ON 50%. A constant current source and sink are used to charge and discharge a timing capacitor whose voltage charge is monitored by a high speed voltage comparator to provide precise sample timing.
    Type: Application
    Filed: October 14, 2015
    Publication date: April 21, 2016
    Applicant: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Scott Dearborn, Cliff Ellison