Construction and working of bipolar junction transistor (BJT)

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Prince Budha · Accepted Answer

The construction and circuit symbols for both the npn and pnp bipolar transistor are given in the figure. The arrow in the circuit symbol always showing the direction of 'conventional current flow' between the base terminal and its emitter terminal. The direction of the arrow always points from the positive p-type region to the negative n-type region for both transistor types, exactly the same as for the standard diode symbol we can tabulate the emitter, base and collector current, as well as the emitter-base, collector-base and collector-emitter voltage for npn and pnp transistor. As the Bipolar Transistor is a three - terminal device, there are basically three possible ways to connect it within electronic circuit with one terminal being common to both the input and output. Each method of connection responding differently to its input signal within a circuit as the static characteristics of the transistor vary with each circuit arrangement. Common Base configuration - has voltage gain but no current gain Common Emitter configuration - has both current and voltage gain Common collector configuration - has current gain but no voltage gain

Explain the construction and working of bipolar junction transistor (BJT)

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Explain the construction and working of bipolar junction transistor (BJT)

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