I have worked on an example earlier today. It's the section on BJT Amplifiers. I have been studying the sub-section on Common-Collector Amplifier. I've come across a rather peculiar formula, which has not been mentioned anywhere in my prescribed textbook besides a worked example. Here is the formula: Re = RE || RL I am pretty much confused about the application of this formula. Can the formula be used in a Common-Emitter circuit?