Patents Assigned to KEITHLEY INSTRUMENTS, LLC
  • Calibration for common mode current
    Patent number: 10514434
    Abstract: A mechanism is disclosed for mitigating common mode current in a test and measurement device. A measurement current can be received from a device under test via a measurement lead that couples a transformer in the test and measurement device with the device under test. The test and measurement device can then be calibrated to apply a nulling current to cancel the common mode current from the measurement current. Other embodiments can be described and/or claimed herein.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: December 24, 2019
    Assignee: KEITHLEY INSTRUMENTS, LLC
    Inventors: Benjamin J. Yurick, James A. Niemann
  • Method and apparatus for pulse generation
    Patent number: 9501085
    Abstract: A method and apparatus for generating a desired pulse waveform including: dividing the desired pulse waveform into a plurality of line segments; assigning to each line segment at least a segment identification, a segment initial value, and a segment duration to form a waveform description; providing the waveform description to a pulse generator. The pulse generator is operable to produce a waveform corresponding to the waveform description and to output the produced waveform.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: November 22, 2016
    Assignee: KEITHLEY INSTRUMENTS, LLC
    Inventors: Pete Hulbert, Michael Rayman, Trish Gottlob, Rajat Mehta, John Lilie