BJT Large and Small Signal Models

[@ahmetabac7345]

Thank you for providing my BJT-ache with an effective painkiller.

[@srishtikumar5544]

This is such a great video, you explained all the doubts I had in class about this subject. Thank you for providing such a detailed and thorough explanation of the DC&AC analysis!

[@Lexyvil]

Thanks a lot! I was confused about what small and large signals meant, and I didn't know there were DC models, since my professor showed AC models.

[@TheAInfinity]

This is very very helpful. Thank you for posting.

[@mateoaboytube]

Thanks. I am glad you found it helpful.

[@DTrain198]

miss, you are a genius.

[@atom-lp7iz]

intellegent & exact explaination of topic, thankyou for sharing Mam!!

[@caprisundad]

Super helpful, thank you very much.

[@jamesshaw6110]

shouldn't ic/vbe = gm and not 1/gm?

[@jaekyungsong2969]

Yes

[@MrMineHeads.]

You are correct. My professor's notes say that. She probably meant 1/r_m

[@abuabdullah9878]

She corrected it 23:09

[@raghuveerdani4046]

what is a small signal model basically? what is its significance?

[@TheTarnonero]

It helps you to understand the circuit's behavior when the input signal has small variations. It's also called center band model which stands for analyzing the behavior of the circuit without any source of power, just by itself. The parameters like input resistance, output resitance, gain voltage describe the behavior of the cirucit.

[@andy6473]

Ty mam

[@vladanlisabon]

very good indeed. thx

[@udeepshrestha8179]

Correct me if im wrong.
I think Eber's Moll Model should contain *two diodes* and *two current sources* sources

[@justacomment4810]

I believe that happens when BJT is in saturation in which BC and BE junction are both on. Otherwise, since we are assuming Forward Active mode, only BE is on and BC is cut off.

[@saadbinyunus1687]

isnt little re supposed to be (α/gm)? where α=(β/β+1)

[@manojkhatri6537]

Thank you!!

[@DeltaSigma16]

Thank you.

[@ianlouzada]

thank you

[@xavierbolivar-hazboun1347]

Thanks for all your videos, incredibly helpful. One small thing, at 15:09 When you write the slope is 1/gm, my textbook actually says the slope is gm prnt.sc/15nast8.

[@scratchindonuts7903]

the mistake was fixed later at 23:15

[@gamernoob8700]

thank you