Electronics Tutorial - Common Audio Amplifier Classes (A, B, AB, G, H and D)

#33 In this electronics tutorial video I take a look at the most common audio amplifier topologies used - the class A, class B, class AB, class G, class H and class D. What makes each of these amplifier classes different in regards to linearity and efficiency? And to show how such electronic circuits can look in a real circuit, I also simulate them using LTspice.

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Electronics Tutorial series:

Music:
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[thezodiace]

00:00 : Introduction
00:30 : Class A Amplifier Theory
02:30 : Class A Amplifier Simulation
04:57 : Class B Amplifier Theory
07:15 : Class B Amplifier Simulation
09:05 : Class AB Amplifier Theory
10:45 : Class AB Amplifier Simulation
14:04: Class G Amplifier Theory
16:00 : Class G Amplifier Simulation
18:53 : Class H Amplifier Theory
20:10 : Class H Amplifier Simulation
22:16 : Class D Amplifier Theory
23:39 : Class D Amplifier Simulation

[philiphart]

Great description of the various amplifier classes. And the LTspice examples really brought it to life. Very well done!

[JoaoBarbosa]

Really happy I discovered your channel. Top notch content!

[mgeo]

A really useful summary video! Classes G and H were new to me! 👌

[ilierazvan]

Felicitări pentru tot ce faci, urmăresc videoclipurile tale de mult timp și abia acum am realizat că ești român, sau cel puțin înveți din cărți în limba română 😅

[DoctorMangler]

Thanks again for these simulation and circuit videos, these help so much. I knew I was learning more when you were explaining the G to H difference in the switch. I wondered when you started what was going to happen to the sig to noise ratio. Well thanks a ton for the unique and well done videos.

[hugoviloriagonzales]

Siempre me gustó la Electrónica y entiendo aprender en Inglés, necesito aprender con estas herramientas modernas.

[mohamedalnggar]

whats the name of this book you teach us?

[visai]

great explanation and great video as always

[mrsc]

ahh, I spoke too soon, , had to speed this one up. I don't know why people keep saying slow down. Makes me wonder if they are engineers. The Harvard and Stanford open courses speak in a way I would consider normal. Diff topic >> Last year I started getting into mag amps, very fascinating stuff. It's like a forgotten technology. There is lots of room for optimization. I don't even think foil tape laminated inductors were a thing when mag amps were relevant. Really cool stuff.

[gkdresden]

Class D is NOT digital, because the analog to pwm conversion is an analog procedure. The pulse width is NOT NECESSARILY and NOT USUALLY discreticed. So you don't have a discrete chain of Ones and Zeros. You have usually a fixed frequency (sometimes even not, like in the case of delta sigma conversion) pwm signal with a continuous variation of the duty cycle.

[dominikworkshop]

great video, very interesting topic and well explained :D

[EliteHEAD]

Hello, kind of basic question, for G and H, why is it necessary to switch the higher voltage, why not have it connected permanently?

[JohnDoe-ub]

What book where you using in this video?

[alirazvan]

Wow... Thank you for this great explanation

[asdfazad]

Bravo!
Very detailed and nice videos !
Especially the video about diy HIFI microphone 🎤...
I think the spwm signal is also generated using the D amplifier scheme, any thoughts!

[changtraidoc]

Excellence video, thank you very much!

[ملكةزماني-ذر]

Why do we have two vOmin values in calss A amplifiers?

[ckkos]

great video, very interesting topic and well explained :D i need to quote this. Keep going! AMAZING

[iamwangine]

Well, very detailed exlications, Nice. Cum fac rost de numarul tau de telefon sau cum ti'l dau pe al meu, putem discuta ceva interesant, sunt rari pe aici oamenii care acopera domeniul audio fara subiectivism. Thanks 😊