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Difference between UJT and FET?

the differences between UJT and FET are :- 1. structural :- a. there is only one p-channel in the UJT where as two in JFET b. the p-channel of UJT is more highly doped when compared to p-channel in JFET 2. functional :- UJT always works in forward biased condition (gate is forward biased) where as JFET always work in rverse bias condition (gate is reverse biased)


Why ujt used as an oscillator?

why ujt used as amplifier


Operation of UJT and block diagram?

Explaine operation of UJT .


Describe the difference between a UJT and a PUT?

i. Constructional structures The UJT is made up of a lightly doped n-region known as the base region onto which is joined a small heavily doped p-region called the emmitter. The PUT on the other hand is a four layer device similar to an SCR except that the gate terminal of the PUT is connected to the n-region adjacent to the anode. ii.Operation The intrinsic stand-off ratio of a UJT is fixed hence operating characteristics can not be alterd. The PUT, on the other hand has operating characteristics that can be altered. These include base-base resistance,intrinsic stand-off voltage, valley current and peak current and all these can be altered by setting the values of two external resistors


Is ujt is a uni polar transistor?

UJT is known as Uni Junction Transistor


How to genrate sawtooth wave by using ujt?

by connecting the ujt with proper biasing resistors


In ujt what does the j stand for?

For many people the letters UJT stand for Unitary Junction Transistor.


Why ujt called current controlled negative resistance device?

The On/OFF action in UJT is controlled by emitter current


Is a UJT a voltage controlled or current controlled device?

voltageCurrent between the two bases of the UJT sets up a voltage gradient in the semiconductor. When the voltage on the emitter of the UJT rises high enough to forward bias the emitter-base junction at the voltage of the interbase gradient where the emitter is located, the UJT "turns on".


What is the basic applicatjon of a ujt?

oscillator


Can ujt be used to trigger scr?

no


What is inter base resistance in UJT?

The bulk resistance between the two bases, which will be different for different types of UJT. Consult the datasheet for the value.