BJT Transistors - Darlington Pair & DC Beta Current Gain 

Damn at this point I'd believe you have every topic imaginable in your channel

I enjoy watching your videos , thank you for offering such quality teaching

Because of you I have 10/10 on a test. Thanks a lot man I wish you were my teacher at school.

Enjoyable video. Great explanation

Thanks for making easy yet in-depth tutorial video!

This man really helps me a lot. Thank you so much.

Great vid bro!

Bruh... I had to watch this like 3 times. But I think you might have just saved my electronics assignment

Well explained Sir

Thank you for this! Its very informative!

Welcome back.

This guy can be a professional teacher

😁Your explain very well

Transistors are useful and interesting devices. In my long years of handling transistors, since 1956, I have always been aware that the input impedance of a transistor is not symmetrical, in that for hard driven common emitter NPN transistor the input impedance is very low for a positive going signala, while it goes higher for a negatively going signal, Obviously this distorts the signal, This is an interesting feature of transistor and for the input impedance to to be regarded as being constant one must operate the transistor over small signal conditions or make it symmetrical by external circuitry using additional diodes. It is because of this that some oscillators as the super regenerative oscillator can quench itself with an RC circuit in either the base or the emitter. Back in 1960 the germanium did not have such a high output impedance and in those days I found out the reverse breakdown voltage of the emitter base junction which was about 14 volts for germanium and about 7 volts for silicon. which was limiting my bistable oscillators. I should have published that when I became conscious of it back in 1957. All my burnt transistors at the collector were used at base emitter, either as normal diodes or zener diodes, Yes, we were poor back then!. The Input impedance of the common collector is said to be high, but again when one looks deep into the asymmetry of the emitter base junction, the situation turns out to be a little more complex if one goes deep into the details. The darlington pair is very asymmetrical when it comes to its imput impedance, Congratulations for this set of videos it took me back to 1954 and a little earlier when I started using them early glass encapsulated one which had a thermal runway and one needed to be careful, Thank you for uploading this video and the others,

this is superb tomorrow is my exam so thanks

Great!

i have a video request, it might sound weird but its teaching shop/trade math for specific trades like welders, plumbers, electricians, etc

Really like you video's. Thank you very much for that. But did get some new questions. What if I have a resistor like 1K in the collective collector? Or each collector has a different resistor? it limits the current for both. What if I want to limit the hfe to a certain max hfe or limit the current at the emitter of Q2? Can you make a video of that?

Thank you man and greets from Germany!

Thank u

Nice .

Yeo whoever you are you helped me with my math during corona

thank you so much, I think this will be the next topic of sir Alguidano

shukran

I saw this in Amplifier outputs

sir can we connect 3 or more transistor

What happens if you add two or more darlington's say 4 darlington's what will total gain be

Farmington pair? More like “You’re the darling of free, highly-educational content on RU-vid.” Keep up the great work!

👏👏👏

is it Ie = 204,02 mA?

Can you make stickers, I want a JG sticker for my laptop, please!

Please examplain positive and negative

what do u exactly teach? or what did u study in specific cuz i find videos of u for alot of subjects

Sir tells us how you create your lecture...what tools and software you are using....make a video on it...

Can you do a full review on cos, sin and tan again. Got a test coming up and don’t remember any of this stuff

Help me with discrete maths partial ordering and equivalence class

What is the supply voltage for the amplification factor of 20300?

What app do you use in your videos??

Was low-key hoping this woulda been an April fool's day video or something

I just clicked the video I have no idea what is this I am in high school

😇😇😇👍👍👍🙏🙏🙏 THANKS !!!!!!