Conditions for Turning on a Thyristor by Short Gate Current Pulses
Conditions for turning on a thyristor by short gate current pulses of arbitrary shape are considered in the presence and absence of an initial charge. The analysis is based on a solution of the equation of continuity of charge in the thyristor bases and on a linear approximation for the emitter leakage current. It is shown that the effective charges in the thyristor bases, produced simultaneously by various agencies, are additive when they are reduced to the initial conditions. Practical examples are given of estimates of the amplitude and duration of gate current pulses capable of turning on a thyristor. Estimates are made of the strays in the gate circuit which are too weak to turn on the thyristor.
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