unijunction transistor

(redirected from Unijunction)

unijunction transistor

[′yü·nə‚jəŋk·shən tran′zis·tər]
(electronics)
An n-type bar of semiconductor with a p-type alloy region on one side; connections are made to base contacts at either end of the bar and to the p-region. Abbreviated UJT. Formely known as double-base diode; double-base junction diode.
References in periodicals archive ?
When the voltage across the piezoelectric transducer [V.sub.p] passes the maximum and starts to decrease, the anode voltage of the programmable unijunction transistor [PUT.sub.1] is maintained at the peak by diode [D.sub.1] and capacitor [C.sub.1].