All About Common Emitter Amplifiers (14-Transistors)

Start with the small signal model of a common emitter amplifier and derive a full and complete expression for the gain. Then, we will do it by inspection using impedance reflection. Then, let's work some example problems.
Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.
danner.group
Video filmed and edited with help of CIT, NUS.

[@wudbi6148]

Would you be able to confirm the accuracy of calculations on a specific example of a transistor in some circuit modeling program, for example in a Multisim?

[@TekCroach]

Excellent tutorials as usual... anyway, I think 26 in the intrinsic emitter resistance formula is kT/q. right? Thanks :)

[@richardchartier3023]

On option 2 how does the capacitor reflect to the base when it's not polarized?

[@silviobarbosa8791]

👍🏼👍🏼👍🏼👍🏼

[@wudbi6148]

Why are other characteristics of the transistor not taken into account in the calculation, such as the volumetric resistance of the base and collector?

[@adanner]

It's a trade-off between complexity of the model and the utility gained from it.

[@wudbi6148]

@@adanner You explain the material well, I hope someday you will have a lesson on in-depth study of the properties of a transistor