Differential voltage measuring apparatus and semiconductor...

Details Differential voltage measuring apparatus and semiconductor... Differential voltage measuring apparatus and semiconductor...

2006-11-21

2006-11-21

Tang, Minh Nhut (Department: 2829)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

Reexamination Certificate

active

07138819

ABSTRACT:
There is provided a semiconductor testing apparatus comprising a current measuring portion which converts a load current quantity at the time of application of a relatively high test voltage to a DUT to fall within a low-voltage range, and then subjects the low-voltage range to quantization conversion with a predetermined measurement resolution even when the relatively high test voltage is applied to the DUT. This is a differential voltage measuring apparatus comprising: an applied voltage source which applies a predetermined constant voltage to a load device; current/voltage converting means for directly inserting a predetermined resistance between an output end of the applied voltage source and the load device, and converts a quantity of a current flowing through the load device into a voltage; and current measuring means which switches and receives a common mode voltage and a detection voltage in time series, shifts the received voltages to predetermined low voltages, and outputs low-voltage measurement data obtained by receiving each of the shifted voltages and subjecting this voltage to quantization conversion.

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