The reason a common-collector amplifier is called an emitter follower is because
A) the output voltage follows the input voltage.
B) the output voltage is taken from the collector.
C) the emitter is grounded.
D) the output voltage is out of phase with the input.

Question

Quizplus · Accepted Answer

The common-collector amplifier is called an emitter follower because the output voltage follows the input voltage. This is because the input signal is applied to the base and the output signal is taken from the emitter, which is directly connected to the input signal through the emitter resistor. As a result, the output voltage follows the input voltage closely, making it useful for providing unity gain and impedance matching.

The Reason a Common-Collector Amplifier Is Called an Emitter Follower