Current measurement apparatus including charge/discharge means and current measurement method using same
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United States of America Patent
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Feb 22, 2022
Grant Date -
Mar 12, 2020
app pub date -
May 17, 2018
filing date -
May 24, 2017
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Abstract
A current measurement apparatus comprises: a capacitor connected in parallel to a signal terminal of a device under test (DUT); a test pattern generation apparatus generating a test pattern to operate the DUT; and a measurement module connected to one end of the capacitor. The measurement module comprises: an input/output (I/O) buffer increasing or reducing an amount of charges of the capacitor and outputting a signal corresponding to an output logic value according to a voltage of the one end of the capacitor; a time measurer measuring an arrival time which it takes for the voltage of the one end of the capacitor to reach a second voltage from a first voltage; and a controller controlling the i/o buffer and the time measurer to measure the arrival time and controlling such that a value of a current related to an inspection of a DUT is measured using the arrival time.
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