Best Answer

A Unijunction Transistor is a transistor that acts solely as a switch.

User Avatar

Wiki User

โˆ™ 2012-06-01 15:24:07
This answer is:
User Avatar
Study guides
See all Study Guides
Create a Study Guide

Add your answer:

Earn +20 pts
Q: What is the purpose of the Unijunction Transistor?
Write your answer...
Related questions

What type of transistor is a JFET?

JFET is a unijunction transistor.

How many junctions are in a unijunction transistor?


Type of transistor?

Bipolar. Unijunction. FET. MOSFET.

Differences between UJT and BJT?

UJT is unijunction transistor where as BJT is bi- junction transistor.

Which device act like a diode and two resistors?

Unijunction transistor(UJT)

What determines the amount of potential required to forward bias a unijunction transistor?

Intrinsic Stand-off Ratio

Is transistor a diode?

A bipolar junction transistor can be used as a diode by shorting the base and collector.A junction field effect transistor operates as a reverse biased diode, but some types will be damaged or destroyed if forward biased.A metal oxide semiconductor field effect transistor is not a diode.A unijunction transistor is a diode with 2 connections some distance apart on its cathode (called base 1 and base 2).A programmable unijunction transistor is really a variation on the silicon controlled rectifier.etc.

What is a UJT?

UJT(UNIJUNCTION TRANSISTOR) is a three-lead electronic-semiconductor device with only one junction that exclusively as an eletrically controlled swtich andit is not used as a linear amplifier.

What is the purpose of a transistor?

Based on the application, a transistor can be used as a switch or a signal in a circuit.

What is composite transistor?

A Darlington transistor is a composite transistor. The definition is a combination of two or more transistors that have the purpose of increasing the current gain.

What is the difference between the UJT and BJT transistors?

UJT (UniJunction Transistor): It is a transistor with only one junction and three terminals: an emitter (E) and two bases (B1 and B2). BJT (Bipolar Junction Transistor): This type of transistor consists of two junctions and three terminals, namely Emitter "E", Base "B" and Collector"C". There are two types of BJT, i) PNP and ii) NPN.

What is transistor BC547?

A small signal NPN transistor used for general purpose audio amplifiers and switching.

What is the purpose of a transistor in a circuit?

Based on the application, a transistor can be used as a switch or a signal amplifier in a circuit. - Neeraj Sharma

What is the purpose of emitter resistance in a transistor?

For thermal stabilization...

What is a Programmable unijunction transistor?

PUT: programmable unijunction transistor It is a device like the thyristor only the gate is connected to the N type material near the anode. It is usually used in time delay, logic and SCR trigger circuits In the PUT, Gate is always positively biased w.r.t cathode. When anode voltage exceeds the gate voltage by about 0.7 V, first junction that is the junction right after the anode gets forward biased and PUT turns on. When anode voltage becomes less than the gate voltage, PUT is turned off.

How do you use the Transistor output terminals of an electronic counter in a Electrical control circuit?

They use transistor as the purpose to transfer the voltage

Can UJT replace BJT?

No. A unijunction transistor (UJT) is entirely different in design and application than a bipolar junction transistor (BJT). The UJT works on the principle of voltage modulation of the effective substrate resistance, while the BJT works on the principle of current amplification from one junction to the other, usually base-emitter to collector-emitter.

Is BC557 a sensor?

No, it's a PNP general purpose transistor.

What does a transistor do?

Depending on how the transistor is biased and various other circuits connected to it, a transistor acts as an amplifier and/or switch. When acting as an amplifier the circuit containing the transistor can do things like transmit or receive radio signals, perform analog mathematical calculations, generate waveforms, etc. When acting as a switch the circuit containing the transistor can do things like turn on/off a light, turn on/off a motor, perform digital logic or mathematical operations, fetch and decode computer instructions, etc. Exactly what a transistor can do is really only limited by the system requirements and the designer's imagination as to how to meet those requirements. There are several different types of transistors: bipolar junction transistors (BJTs), field effect transistors (FETs), unijunction transistors (UJTs), programmable unijunction transistors (PUJTs), spacitors, surface barrier transistors (SBTs), tetrode transistors (TTs), point contact transistors (PCTs), etc.

Why ujt have this type of symbols?

The symbols in the unijunction transistor show its internal configuration. The emitter (arrow) represents the polarity. When it points in that is a P type transistor. Pointing out is an N type. The the table on its side the table top touching the emitter (arrow). Its' "legs" are the connection to two bases in the device. It does not have a collector. Refer to another Wiki answer for more info.

How do darlington transistors work?

A Darlington transistor it may contain one or more transistor in its case. the purpose is to amplify current by beta multiplication.

What is unijunction tranjistor?

In unijunction transister there be a only one P-N Junction like diode, and current conduction takes place by either through holes or electrons.

What is the meaning for sl100?

General Purpose Medium Power NPN Transistor

Are the Bipolar Junction Transistor and the Transistor the same thing?

Sort of. The Bipolar Junction Transistor, or BJT, is a type of transistor. But the term transistor applies to a much wider family of components than just the Standard BJT. A rough list of the other common types of transistors includes:Field effect transistors, or FETs, including both Junction types and Metal-oxide Semiconductor types: JFETs and MOSFETs. and also UJTs or unijunction transistors.In a basic electronics course, though, if you say just 'transistors' it is assumed you mean BJTs.

What is the purpose of dc biasing of transistor?

to establish Q- point or operating point...