Patents by Inventor Kevin G. Cawley

Kevin G. Cawley 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).

  • High gain, high voltage power amplifier
    Patent number: 8717098
    Abstract: An opto-isolated amplifier and method are disclosed. The amplifier includes an input node configured to receive an input to be amplified. A pair of opto-isolators are coupled between an input node and an output node. The opto-isolators are configured to create gain between the input node and the output node. An amplification stage is coupled to the opto-isolators. The amplification stage includes an input coupled to the output node and an output configured to generate an amplified output. The opto-isolator outputs may be configured to generate a difference current. The input of the amplification stage may have a high impedance compared to an impedance at the output node, the difference current being directed at the high input impedance input of the amplification stage to generate a gained voltage.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: May 6, 2014
    Assignee: Keithley Instruments, Inc.
    Inventor: Kevin G. Cawley
  • HIGH GAIN, HIGH VOLTAGE POWER AMPLIFIER
    Publication number: 20130265110
    Abstract: An opto-isolated amplifier and method are disclosed. The amplifier includes an input node configured to receive an input to be amplified. A pair of opto-isolators are coupled between an input node and an output node. The opto-isolators are configured to create gain between the input node and the output node. An amplification stage is coupled to the opto-isolators. The amplification stage includes an input coupled to the output node and an output configured to generate an amplified output. The opto-isolator outputs may be configured to generate a difference current. The input of the amplification stage may have a high impedance compared to an impedance at the output node, the difference current being directed at the high input impedance input of the amplification stage to generate a gained voltage.
    Type: Application
    Filed: July 12, 2012
    Publication date: October 10, 2013
    Applicant: KEITHLEY INSTRUMENTS, INC.
    Inventor: Kevin G. Cawley