Ujt Pin Diagram. The n region is lightly doped. The pinout details is also included in the above datasheet.
The ujt is not used as a linear amplifier. It is used in free running oscillators synchronized or triggered oscillators and pulse generation circuits at low to moderate frequencies hundreds of kilohertz. The ujt junction is a 3 terminal solid state device emitter and the two bases.
This trigger voltage is a fraction n of interbase voltage vbb.
The uni junction transistor ujt has two doped regions with three external leads. Lead dimension is uncontrolled in p and beyond dimension k minimum. When the circuit is powered the capacitor keeps pin 2 positive until the cap reaches a point and stops transferring to pin 2. Contour of package beyond dimension r is uncontrolled.
