Patent US 4,338,618

A composite junction-gate static induction transistor comprising a main static induction transistor (SIT) having a source, a gate and a drain, and an auxiliary static induction transistor having an auxiliary source connected to the source of the main SIT, an auxiliary gate connected to the gate of same SIT and an auxiliary drain connected to the auxiliary gate. An input signal current is applied to the composite gate and charges it up to a certain level, and thereafter it may flow through the auxiliary static induction transistor. Therefore, minority carrier storage in the junction-gate static induction transistor can be greatly reduced.