Engineering question (BJT and MOSFET)

[ncsurfing]

lazy to read the intro? my specific question appears below the dotted line.

Okay I know I'm not posting in an Engineering forum per se (concepts), but I'm looking for a good answer for some work I'm doing as well as my own knowledge. I'm writing a lab report on single stage BJT and MOSFET amplifiers. I'm currently discussing differences in properties and pros/cons of using each.


---tl;dr----

Can you please mention some comparisons, especially WHY BJTs offer a larger small signal-source voltage gain Av? Free to use formulas, small signal models, etc in your explanation.

My data:
In my lab, the Common-Drain and Common-Collector amplifier both offered around 0.9 gain. In other words giving me about a unity gain. While the difference between Common-Emitter and Common-Source was 73 vs. -19.


(So you can best answer me according to my level, I'm an Electrical/Computer undergraduate in my junior year)

[SY]

Get yourself over to the University library and grab a copy of Horowitz and Hill's "Art of Electronics." With some reading, you'll get all the info you need, and you'll be far better off than if you just have some experienced engineer do your lab assignment for you. Key word will be "transconductance."