Patent ID: 6396298
Filing Date: 2002-05-28
Classification: G01R

Abstract:
A method of testing a device under test (DUT) having an input terminal and an output terminal, the method comprising the steps of,DC applying a DC voltage level through AC sensing isolation to the output terminal, pulsed applying a pulsed input signal through AC input isolation to the input terminal, the pulsed input signal serving to activate the DUT to conduct output current through the output terminal at an output voltage level, DC sensing the output voltage level through the AC sensing isolation to provide a DC sensing signal AC sensing the DC sensing signal through AC feedback coupling to provide an AC feedback signal, and feeding back the AC feedback signal as a feedback drive signal through AC correction coupling and through AC drive isolation to provide the output current with a feedback drive signal for correcting the output current to stabilized the output voltage at a DC voltage level during the pulsed input signal.