Electronic device measurement apparatus

Details Electronic device measurement apparatus Electronic device measurement apparatus

G - Physics

01

R

356/117

G01R 31/26 (2006.01)

Patent

CA 1228176

-1- ABSTRACT A voltage divider and a current detecting resistor are connected between both terminals of a device under test (DUT), and three buffer amplifiers are connected to both the terminals of the DUT and an output terminal of the voltage divider. A voltage from a floating power supply is applied between one terminal of the DUT and a common junction of the current detecting resistor and the voltage divider. Since a current flowing through the voltage divider does not flow through the current detecting resistor, a voltage across the current detecting resistor is proportional to a current flowing through the DUT. An operational circuit receives output signals from the three buffer amplifiers to obtain a voltage proportional to a voltage across the DUT. A characteristic of the DUT is measured in accordance with the voltage across the current detecting resistor and the voltage from the operational circuit.

491892

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