Npn And Pnp Transistor Diagram. Before starting with the circuit diagram you should know the concept of npn transistor as a switch. The pnp transistor configuration is shown below.
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Npn transistor switching circuit. Pnp is exactly the same the only difference being in their biasing and the polarity of the power supply for each type. Transistors have three terminals namely emitter collector and base.
Generally the pnp transistor can replace npn transistors in most electronic circuits the only difference is the polarities of the voltages and the directions of the current flow.
The construction and circuit symbols for both the. The pnp transistor configuration is shown below. Bipolar transistor construction. Below we go over the concepts explained above in more depth with diagrams to better illustrate the differences between npn and pnp transistors.
