Hi Can someone explain to me how they got part c) finding the small signal; voltage gain in the following document. View attachment ques5_tut4.doc This is the AC equivalent circuit i used. P.S

Please don't upload .doc or .docx formats. If a simple .png image isn't enough, use the .pdf at least. Many members are reluctant to use the .doc format.

Personally I think the solution to part (c) is overcomplicated. Since it is required to find Vo/Vs, I would simply assume a voltage source of value Vs is applied to the emitter. From there one can observe that Given that, one can then determine the output as a function of vs since or Av=6.744 [which seems a better estimate to me than 6.73]