Making Transistors Easy.. With Op-Amps!

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Today we're looking at how our op-amp golden rules can make those annoying things about transistors disappear completely! No more VBE drop, No more temperature problems!
By putting a transistor in the feedback loop of an Op-Amp, the negative feedback will enable us to monitor what the output of the transistor is, and the op-amp will compensate for any variations or unkown quantities in the transistor. Making our transistor designs much easier to manage!
Schematic: drive.google.com/file/d/1sWML...
Patreon Video: / 57948865

[@thomasgauntt]

Maybe the most underrated electronics channel on KZbin

[@dannyroessler]

true, I learn so much here, no blingbling, just a bit of math

[@zeiram8230]

Wow. Op amps are better at biasing transistors than I was in school. 😆

[@TheAudioPhool]

me too :(

[@guyfradasyl88650]

very clear explanation, you have the quality that we want from a professor. great job

[@MrAlFuture]

Wow, you're the tutor I wish I had at uni! Your videos are really great. I like how most new concepts you introduce you describe in terms of solving a problem you've just illustrated. Thank you!

[@TheAudioPhool]

Thanks so much! I always try and set everything in the context of something you can actually do, i feel like it makes everything easier to grasp. I can't learn something unless i can imagine what it's actually doing!

[@ernestbean2998]

It would have been great to have these vidios at colledge

[@ccv3237]

I love op-amps in general, and your detailed explanations. These are very useful devices.

[@alfredtambunan8961]

This is new but genius way to solve many of my problems. Thank you Great Teacher...!

[@timothykraft9245]

Great explanations. So clear. Thank you.

[@MrBanzoid]

Most useful and clearly explained. Thank you. Duly subscribed!

[@martindowney7915]

Great explanation, love the chanel

[@oseyedian]

This was a really interesting and informative video. Thank you very much fine sir.

[@arnabmusouwir9018]

that was a great lesson

[@yurkshirelad]

Brilliant!!

[@twobob]

Very nice. I swear you added the 50Hz hum for the voiceover on purpose ;)

[@G-Arslan]

Hi, thank you very much for these videos mate. I wonder if the op-amp driven class b amplifier had any other imperfections other than the requirement of high slew rate op-amp at high frequencies

[@richtigpopichtig4563]

A video on simple capacitive touch plates would be very awesome.

[@TheAudioPhool]

That does sound like fun tbh. I'll put it on my list!!

[@Enigma758]

I made the 2nd circuit with an LM324 (rail to rail), 2n3906 PNP, 1k Rc, 1k pot on the emitter, 5v supply. While the circuit works, I can't get an emitter voltage below 1.3v when I set my vref below that (however if I configure the LM324 as a buffer, it tracks the voltage below 1.7v very close to low rail just fine though). Any ideas why the ~1.3v limit?

[@marcelpost4052]

amazing content, thank you very much for your clear and practical demonstrations. I have almost watched all your videos, but I wonder if you have made such a clear video on the why's and hows of designing a power supply for an opamp. Keep up the good work! :-)

[@TheAudioPhool]

I'm literally making that video as we speak!

[@marcelpost4052]

@@TheAudioPhool Great minds think alike! Hahaha.. Please don't rush it. I know how tempting it is to hit upload and then later come to the realisation I should have edited that or added this. Your video series is already a treasure trove of information and your enthusiasm is very inspiring, so we're happy to wait for the final product, take your time.