AC parameters measuring system of nonlinear resistances

which can adjust AC power source automatically

is developed

based on function generator MAX038

general multiplication AD734

data collecting card and computer with A/D and D/A port.The system can be used to measure AC parameters of nonlinear resistances

i.e.U1 mA

U100 μA

U10 μA and Io（total leak current）

Ir（resistive current）.The AC voltage output range from 0 V to 15 kV

and the harmonic value is less than 1.5%.Adopting the harmonic compensative technique

Ir can be measured

and compared with Heithley191 of high accuracy（0.1%）

the measuring deviation is less than 1%.Therefore

this measuring system has higher efficiency and precision.