SIT/SITh (Static Induction Transistor/Thyristor)
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The static induction thyristor (SI-thyristor, SITh) is a thyristor with a buried gate structure in which the gate electrodes are placed in n-base region. Since they are normally on-state, gate electrodes must be negatively biased to hold off-state.
SIT(Static Induction Transistor) is high power, high frequency device. It is a vertical structure device with short multichannels. SIT has short channel length, low GATE series resistance, low GATE-SOURCE capacitance & small thermal resistance. It has low noise, low distortion and high audio frequency power capability. Turn-on & Turn-off time are very small typically in 0.25microsecs.