Derive the expressions for closed-loop gain Avf, input resistance Rif, and output resistance Rof of the following image.© BrainMass Inc. brainmass.com March 4, 2021, 5:59 pm ad1c9bdddf
This is a schematic of the basic emitter follower circuit. Just a transistor and a single resistor from the emitter to ground.
Writing the voltage equation around the input loop,
Vi - Vbe - Vo = 0 ---------- 1
Making Vbe very small or the gain large, we have, Vi =(approx.) = Vo
The expert derives the expression for closed-loop gain Avf, input resistance Rif and output resistance Rof for an image. The solution helps with all explanations and mathematical steps.