Patent ID: 8674713
Filing Date: 2014-03-18
Classification: G01R

Abstract:
1. A method for correcting current data samples representative of a current signal from a device under test comprising steps of: receiving the current signal using a current sensor coupled to the device under test and generating the current data samples representative of the current signal from the device under test; receiving a voltage signal corresponding to the current signal from the device under test using a voltage probe and generating voltage data samples representative of the voltage signal; extracting current fluctuation data samples representative of deviations of the current data samples from a zero ampere level, the current fluctuation data samples corresponding to off-periods of the device under test as derived by detecting corresponding off-periods of the device under test in the voltage data samples; interpolating the current fluctuation data samples of the off-periods of the device under test for generating current fluctuation data samples corresponding to on-periods of the device under test; subtracting the current fluctuation data samples corresponding to the off-periods and the on-periods of the device under test from the current data samples representing the current signal to generate corrected zero ampere level current data samples; and generating a waveform display using the corrected zero ampere level current data samples.