A new approach to the simulation of small-signal current gains of pnpn structures

An approach to the mathematical simulation of small-signal current gains (alphas) versus frequency that respects Fulop's measuring procedure is proposed, using an arrangement close to the real measuring circuit. For this purpose, an exact 1-D mathematical model is used. The dependence of small-signal alphas on the anode current of a high power thyristor (GTO) was found to be in agreement with measurements for low anode-to-cathode voltage.<
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