Multistage Transistor Audio Amplifier Circuit

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This electronics video tutorial discusses the basic elements of a multistage transistor audio amplifier circuit. It explains the importance of the bypass capacitors as it relates to voltage gain and distortion as well as the importance of the potentiometers for volume control and managing the input voltages. It also mentions the DC beta and hfe values of a typical NPN transistor as well as the purpose of the coupling capacitors. Finally, it discusses the efficiency of a regular common emitter transistor amplifier vs the class A transformer coupled amplifier.
Transistors - NPN & PNP:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AcxDiesy-nI.html
BJT Transistors - Electronic Switches:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VJJuxQk5fTY.html
Night Activated LDR Sensor Circuit:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-X5jm9_nikd8.html
Finding The DC Load Line & Q-Point:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qKIEyN_y3d4.html
Voltage Divider Bias Circuit:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-jPSIQDyKm90.html
Collector Feedback Bias Circuit:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EzanqOFnCx4.html
__________________________________
Emitter Feedback Bias Circuit:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-V1zKogDwXyk.html
Common Emitter Amplifier:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZUXG9eZfSlw.html
Common Collector & Base Amplifier:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SmsTQ7MVqRw.html
Darlington Pair & Beta Current Gain:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-t1YECnWPGbQ.html
Class A, AB, B, & C Amplifier Circuits:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0e_OUyGCaBs.html
Voltage Gain of Transistor Amplifier:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--MyVscG-Pew.html
_________________________________
Transistor Audio Mixer Circuit:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CKaDxZrjaGA.html
Operational Amplifiers:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-idJEMYhrIfs.html
Summing Amplifiers:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-p4FQyOwjhLA.html
LM386 Audio Amplifier:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-MvTCROpv_jw.html
LC Oscillator Tank Circuit:
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nh4q7mIhLrY.html
_______________________________
Final Exams and Video Playlists:
www.video-tutor.net/
Full-Length Videos and Worksheets:
www.patreon.com/MathScienceTutor/collections

Опубликовано:

1 май 2020

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Комментарии : 52

@PunmasterSTP 3 года назад

Multistage transistor audio? More like "Multi-playlist solid gold", because all of your videos are absolutely outstanding!

@panz3r524 4 года назад

Hey men, btw im from philippines, i just want to say thank you cause you help me alot in physics and math :) thanks for teaching us and actually i understand alot from you than in my school ah i dont know what to say but thanks alot keep it up :) SORRY MY ENGLISH IS BAD

@PunmasterSTP 3 года назад

I actually think your English is pretty good!

@minhtam5051 4 года назад

Very good video. I hope to see more videos in terms of concept like this. Keep doing the good work, mate!

@dhikshithbalaji1714 4 года назад

I like the way you teach, it really helps my understanding. I would like to see more videos from you. Excellent job brother. My first like and first comment to this vedio.

@Brandon-lx3mf 4 года назад

currently preparing for my physics one final on Monday using your videos, will be studying this next semester in physics 2, I guess it never ends

@PunmasterSTP 3 года назад

How did your tests and classes go?

@Brandon-lx3mf 3 года назад

@@PunmasterSTP eneded up getting a b- in physics 1, but to be fair my professor was very difficult. Currently in my junior year of electrical engineering with a 3.6/4 gpa

@PunmasterSTP 3 года назад

@@Brandon-lx3mf I think a B is good, especially for a hard professor, and I'm glad to hear about your GPA! I was close to EE myself (I did biomedical engineering with a concentration in programming and electronics). How has that been going?

@fisherofmen489 Год назад

@@Brandon-lx3mf Would you say that this is a good first project to complete as an EE student, I'm still taking intro engineering courses but have been doing a lot of self-studying on the subject

@Brandon-lx3mf Год назад

@@fisherofmen489 Yes definitely. If you can understand this well you will do good in your electronic courses

@PoboyMusic Год назад

This guy knows everything

@successthruknowledge 2 месяца назад

This was a really great discussion of how all the elements work together - once he explained then I understood it. However, I'm still lacking sorely in my understanding of how circuits are devised. When he added C6 and told us why then I felt like I was watching a magician pull a rabbit out of a hat though I was too distracted watching his sexy lady assistant to understand how and why the feat was accomplished. He needs to do some lectures on circuit design. Starting with simple circuits then to more complex ones.

@raymunyaka5409 3 года назад

For this. thumbs up bro; with regards from Kenya

@jstro-hobbytech 2 года назад

Great video man. I know this is theory but I'd love to see it on a breadboard, especially the transformer.

@chillidogkev 4 года назад

I've been subscribed to this channel for a long time...who actually is this guy? Where's he from? What does he do apart from making great videos? Anyone know? And why 'organic chemistry' tutor?

@star-lord5963 4 года назад

He is a man of many secrets, the only question is will he ever reveal himself?

@smashrugged 4 года назад

I know who he is

@chillidogkev 4 года назад

@@smashrugged Well based on the replies of that quality and pretend mystery I've lost all interest whatsoever in ever knowing. When you ask a simple question and these are the answers you get you just know it's time to walk away...

@johnnyjohn9134 4 года назад

You are a great teacher!!!

@felixcat4346 4 года назад

Coupling is pronounced Cup the "o" is silent. Thanks for posting.

@abigailabigail2196 4 года назад

I love ❤️ u dad

@Dazzwidd 6 месяцев назад

C1, C2, C3 don't need to be that big in practice because of the input and output impedances of the stages. In practice 1uf will be enough and 10uf is overkill

@hariharan-yi8tf 2 года назад

12:22 if a.c affects distortion in q2 then how can whole circuit sourced by a.c ,q1 also gives out a.c ? So resistor handles both a.c and d.c?

@antisocialshelley2326 4 года назад

Thank you

@stephjans6411 4 года назад

How can you solve circuits with complex capacitor layouts, i.e. that they cannot be reduced by using the formula for capacitors in series or in parallel? Does Kirchoff Law applies to capacitors too?

@PunmasterSTP 3 года назад

I think that Kirchhoff's rules always apply, but when analyzing alternating currents, you have to remember that capacitors and inductors each have a reactance.

@whatifology_official 4 года назад

Thanks 😊 keep it up 👍

@AR-vb4xy 4 года назад

Organic Chemist tutor should change us name to Physics tutor. He teaches Physics a lot more than other subject.

@PunmasterSTP 3 года назад

I think he could probably change his name to "Almost Everything Tutor" honestly...

@deuce-way1440 3 года назад

I'm using these values on a circuit right now. This is not working

@nancysingh2511 2 года назад

😭

@artisticyeti22 Год назад

Theory never works in real life

@theoreticalphysicist9241 4 года назад

Love

@edilmarlulab924 Год назад

Why you use multi staging ampli if you can set the first stage Vce & Ic to half?

@rw2954 Год назад

Consider Beta is 100 and the current on Ib is 1mA. You can only get 100mA of current on Ic. Multi stage amplifiers are used to increase power in the later stages. I am currently trying to make an RF amplifier circuit, current on the antenna is pretty much nA and takes careful amplification to get a decent signal to decode audio.

@ulisesperez1241 4 года назад

This is very organic hahaha

@erengunes1810 4 года назад

How do you integrate (lnx/x)^2 Answer please

@ismailmustaphe5241 4 года назад

Use integration by parts. U=lnx Du/dx=1/x V=1/x^2 When integrate V=-1/x The formula=uv-integral of vdu -1/xlnx-1/x^2 The last answer you can remove of vector: -1/x(lnx+1/x)