CONNECTION CIRCUIT OF TEST WAVEFORM GENERATOR

摘要

PURPOSE:To attain a surge characteristic test with a test waveform having large energy and also to apply the test waveform to a test circuit which no deterioration of the rise characteristic of an output waveform of a waveform generator, by connecting a varisterl and a capacitor in parallel to form a connection circuit. CONSTITUTION:The electrostatic capacity C1 of an equivalent circuit shown in a figure (a) is shown together with the input capacity C2 of a circuit to be tested. The ramp wave input fed from a generator A is assumed as Vin together with the action start voltage of a varister is assumed as Vz, respectively. Thus a test voltage waveform V(t) which is supplied to the circuit to be tested via an internal equivalent resistance R is kept at [Vin-V(t)]<=Vz until the varister of a connection circuit reaches the voltage Vz. Then V(t)=Vin-Vz is satisfied after the varister reaches Vz. In such a case, the rise characteristics producing a time delay are equal to the ramp wave input Vin as long as C1<