question_answer

What is the phase difference between input and output voltage of common emitter transistor amplifier?

Answer:

\[180{}^\circ \] Output voltage is given by, \[{{V}_{0}}=-{{\text{A}}_{V}}{{V}_{i}}\] where, \[{{\text{A}}_{\text{V}}}\]is the voltage gain. The negative sign implies that there is a phase difference of \[180{}^\circ \] between the input and output voltages of a CE amplifier.