Question

Emitter follower having Ri = 500 K Ω and R 0 = 20Ω. Assume h fe = b.For the emitter follower circuit with R S = 0.5K and R L = 5K, calculate A I , R i , A V , A VS , and R 0 .Assume h fe = 50, h ie = 1 K, h oe = 25 µ AV
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Answer 1

But in most applications, common emitter and common collector amplifier circuits generally have high input impedances. Some types of amplifier designs, such as the common collector amplifier circuit automatically have high input impedance and low output impedance by the very nature of their design.