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2N Transistor Pinout, Features, Circuit & Datasheet

In the above circuit we are working 2N as a relaxation oscillator to produce trigger pulses or oscillations. This cycle of capacitor charge and discharge form a triggering cycle for the UJT to give voltage pulses at the output or VB2.

The device is preferred in other applications where guaranteed minimum pulse amplitude is darasheet and also where a low emitter leakage current and a low peak point emitter current trigger current are required.

How to use 2N Transistor 2N has many application circuits but for understanding the working let us consider the relaxation oscillator circuit of the device. By this we have UJT acting as an oscillator giving voltage pulses at the output and in a similar way we can use the device in other application circuits. Pin Configuration 2N is a three terminal device and the conductive case also connected to a terminal. Submitted by admin on 3 November The device is popular as a triggering device and is not suited for driving power loads.

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TL — Programmable Reference Voltage.

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With the flow of time the capacitor gets charged as the current flows through R3 to reach the capacitor. Working When the power just turned ON, the UJT will be in high resistance state and total supply voltage appears across it. With completion of capacitor discharge the UJT will again return to normal OFF state 2n264 will stay in that state until the capacitor discharges again.

The capacitor C1 is for triggering the UJT and resistor R3 is for limiting the flow of charge to capacitor.

The circuit is powered from single power source of VCC. With this current flow at the emitter the UJT will get from high resistance to low resistance state and there by acting as a short circuit.

Once the capacitor gets charged to threshold voltage at a certain time T1, it will discharge by forcing the current through datzsheet of the UJT.

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When the power just turned ON, the UJT will be in high resistance state and total supply voltage appears across it.

Under such case we will have VB2 or UJT voltage drop taking a sharp dip as datqsheet in graph and at other hand because of current flow a voltage appears across R2 VB1 there by producing a sharp pulse voltage as shown in graph.

Last modified: April 26, 2020