NPN BJTs can be used as emitter followers. In the given circuit, the emitter follower is connected to a non-ideal voltage source (Vs) with a source resistance (Rs). Beta is 100, Vce,sat is 0V, and Vbe is 0.7V. 1. What is Vo if Vs = 3V and Rs = 5k ohms? 2. What is Vo if Vs = 3V and Rs = 0 ohms?

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BJT (Bipolar Junction Transistor)

A BJT is a semiconductor device with 3 terminals that consist of a p-n junction diode that can amplify the signal or current. It is a current-controlled device. The three BJT terminals are base, collector, and emitter. The BJT works with the charge carrier, the two type of carriers in the BJT are holes and electrons, the charge carriers flow by the process of recombination. The signal to be amplifier is generally given as the input at the base terminal and an amplified form of it is available at the collector terminal.