Question

(a) Write the functions of the three segments of a transistor.
(b) The figure shows the input waveforms A and B for 'AND' gate. Draw the output waveform and write the truth table for this logic gate.

Answer 1

(a) Emitter : It emits the majority charge carriers.
Base : It controls the flow of majority charge carriers.
Collector : It collects the majority charge carriers emitted by the emitter.
(b)

Truth table for AND gate :
$\begin{array}{ccc}\text{A}& \text{B}& \text{AND Output}\\ 0& 0& 0\\ 0& 1& 0\\ 1& 0& 0\\ 1& 1& 1\end{array}$