Patent ID: 7138819
Filing Date: 2006-11-21
Classification: G01R

Abstract:
1. A semiconductor testing apparatus including a function which applies a predetermined direct current to an IC pin of a device under test (DUT) and measures a current flowing at this moment, comprising: an applied voltage source which applies a predetermined constant voltage to the DUT; current/voltage converting means for directly inserting a predetermined resistance between an output end of the applied voltage source and the IC pin of the DUT, and converting a quantity of the current flowing through the DUT into a voltage; and when a voltage at the output end of the applied voltage source is a common mode voltage, a voltage applied to the DUT through the current/voltage converting means is a detection voltage, and a difference between the both voltages is a potential difference, current measuring means for switching and receiving the common mode voltage and the detection voltage in time series, shifting each received voltage to a predetermined low voltage, and respectively outputting low-voltage measurement data obtained by receiving each shifted voltage and subjecting the received voltage to quantization conversion.