Hey guys! Don't forget to subscribe to channel to help me grow it 😁 Support the channel being a Patron www.patreon.com/allelectronics

@muzate

Жыл бұрын

00

Probably the clearest explanation I've ever seen. Excellent presentation

@AllElectronicsChannel

3 жыл бұрын

Thank you, man! 😄😄

I have been watching youtube videos on electronics for years, but I have never seen anyone explain the operation of amplifiers as clearly as you. For the first time I actually understand how an audio amp works. Well done and thank you.

@AllElectronicsChannel

9 күн бұрын

Glad you liked it!

I’ve seen this explained about a million times, but this video highlighted some subtleties that I never considered before. Well done!

Excellent teaching! Where many videos explain too little and others over complicate things, your explanations are perfectly clear. Thanks very much!

You're a natural teacher Gregory. Keep up the great work!

I am sure that you are a treasure for me in the science of electronics, because no one can explain like you. The only obstacle is that I do not understand English, but thank God this video is translated into Arabic. I hope that all your videos will be like this. Thank you very much, creator of electronics. Thank you very much.

First time on your channel. I'm amazed by the amount of devices you've got here. Outstanding!

@AllElectronicsChannel

5 ай бұрын

Thanks and welcome!

Very nice explanation and example. Well done!

Beautifully explained! Thank you so much!

Excelent. The most clear explanation I've ever seen about amplifiers

2 years latter, thanks for this very clear explanation, the best yet of a push-pull configuration

@AllElectronicsChannel

2 жыл бұрын

Thank you Edgar! Welcome to the channel

One of the best explanations ever - excellent for beginners!!!

@AllElectronicsChannel

3 жыл бұрын

Thank you!!

That was an excellent explanation and excellent demonstration.

@AllElectronicsChannel

8 ай бұрын

Glad you enjoyed it!

Thanks A Lot.This Is A Clear Explanation .

Thank you for this precise lecture /presentation. You have a subscriber.

Excellent!!

Thank you Gregory, I think your English is quite good. Thank you for explaining the topic so well.

@AllElectronicsChannel

4 жыл бұрын

Thank you !! I will be posting every week something new. Thanks for your support

you can not disagree with your perfection! keep teaching !

@AllElectronicsChannel

Жыл бұрын

Thanks! Welcome

Excellent explanation of push-pull amplifiers. You would make an excellent electrical engineering professor. Thanks for sharing your expertise!

@AllElectronicsChannel

2 жыл бұрын

Thank you!

No doubt the best explanation on the net. Most are too superficial, you do a great class, white board and then actual build and test. Keep at it, making videos is tough, subject matter tricky. Awesome work. Thanks

@AllElectronicsChannel

Жыл бұрын

Thanks man!!

this is the best push pull video , thank you

@AllElectronicsChannel

9 ай бұрын

Glad you liked it!

Perfect didactic, Greg! Thank you!!!

@AllElectronicsChannel

9 күн бұрын

Thanks man!

Superb explanation. Every word was valuable. Thank you so much for this!

@AllElectronicsChannel

2 жыл бұрын

Thank you!!

Absolutely incredible video thank you so much!!

@AllElectronicsChannel

2 жыл бұрын

Thank you! Welcome to the channel

Beautiful video ! In addition to the technical content, I would add that your clear way of expressing yourself and your slow pronunciation is of vital importance to me, since I am Italian. Well done !

@AllElectronicsChannel

2 жыл бұрын

Thank you!! Greetings from Brazil

Great explanation!

@AllElectronicsChannel

10 ай бұрын

Glad you think so!

Excellent..!!

A melhor explicação! The best explanation!

@AllElectronicsChannel

2 жыл бұрын

Thanks !!

Thank you man. Great explanation! 👍

@AllElectronicsChannel

2 жыл бұрын

Thank you!

This is so clear. Great explanation that I finally get what class AB bias vs class A nice 😊

@cityoflights3808

Жыл бұрын

Seriously, I am not an engineer or anything just like audio stuff and can do only do minor repair to vintage stuff with a 50/50 success rate. But this really allowed me to understand very basic concepts in a much more concrete way. Just the right amount of detail. I feel much more confident adjusting and checking bias on old equipment and understanding how to use a ‘scope for it. Now if I can only figure out why two resistors just went up in smoke on my old turntable…

Most valuable information related to understanding operating of hi fi amplifier. Great upload,,thanks a lot sir...

@AllElectronicsChannel

2 жыл бұрын

Thank you.

I wish my teacher at university had explain it like this

Very good explanation. Congrats. Keep up the good work!

@AllElectronicsChannel

Жыл бұрын

Thanks Tiago!

@tiagomello

Жыл бұрын

I like the way you built the prototypes. Could you go over some techniques for building circuits using one side copper boards (as a suggestion for a new video, if you haven’t done it already)? Thank you!

Superb, good learning. Thanks

@AllElectronicsChannel

3 ай бұрын

You are welcome!

Please keep doing such great videos, your explanation was way simple and clearer than that of my professor

@AllElectronicsChannel

3 жыл бұрын

Thank you! What other topics would be interesting?

@sabih1677

2 жыл бұрын

@@AllElectronicsChannel How about AC analysis of a BJT and Mosfet?

@AllElectronicsChannel

2 жыл бұрын

@@sabih1677 Really nice!! We will do it! Thanksss

👋Hello Gregory I am from India you explained very great using oscilloscope this video will help the people who are interesting in designing of complimentary symmetry amplifier. Please upload one video of push pull amplifier using high voltage mosfet like IRF 150, IRF 250 And so on

It would be interesting to see (both theoretically and in practice) how such a push-pull pair operates given a load that includes reactive components. The reason is that it's the current which matters when deciding which transistor is open, but its phase is not the same as of the voltage.

Excellent explanation thank you

@AllElectronicsChannel

2 жыл бұрын

Thanks!

great explanation, thanks

@AllElectronicsChannel

2 жыл бұрын

Thanks!

A video I understand clearly thank you.

@AllElectronicsChannel

9 күн бұрын

You are welcome!

Thank u sir

Superb explanation bro❤😊

@AllElectronicsChannel

8 ай бұрын

Thank you so much 🙂

More info on how to setup the scope for differential mode and why you used the mode and where you use it would help.

Great job. Subbed and rang the bell. Thanks!

@AllElectronicsChannel

2 жыл бұрын

Welcome to the channel!!

At 6'30''' the 0.3V output voltage will be split between the emitter R and the load if current is flowing, which it will be as the Q is on.

well done!

@AllElectronicsChannel

5 ай бұрын

Thanks!

Beautiful explanation, couldn't we also use an opamp with feedback going from output to the inverting terminal and the signal coming into the non inverting terminal of the opamp

Great video Gregory! How does one go about calculating the value to be used for the Emitter resistors when building out a push pull amplifier? You mentioned you used a 3.9 ohm for each transistor, but I'd like to know how you determined that please.

@AllElectronicsChannel

3 жыл бұрын

Hello man! In the example I used 3.9 because it was what I had around. The resistance needs to be calculated based on the bias voltage and the bias current needed, and it needs to compensate the Vbe temperature coeficient.

Hello sir u r perfect teacher

@AllElectronicsChannel

3 жыл бұрын

Thank you man!! Please show the channel to your friends to help me grow it!! 😀

This video is just fantastic! Had to watch it a few times to absorb all of it (and probably still missing some insights). I have one question. At @30:16, what are those little current spikes (red trace) when the signal enters in cross-over? They seem to remain there also when we move to AB class.

@AllElectronicsChannel

2 жыл бұрын

Thank you!! Good question! It seems more like current spikes from the junctions capacitance, responding for the transients between the positive and negative cycle. Would be nice to investigate it more!

good work !

@AllElectronicsChannel

Жыл бұрын

Thanks!!

Thanks!

@AllElectronicsChannel

Жыл бұрын

Welcome!

You are the BEST!!!! 😀😀😀👍👍👍🙏🙏🙏.Can you have some class talk about feedback circuits?

May I ask a question? At 24:11 you say that it'd have 0,7v across each resistor but the total voltage would be 1,2V. Why? Wouldn't it be 1,4v? And after when you consider the trimoot with 2k ohms, it is 0,7v , 1,4v and the results would be 2,3v? Why? Why not 2.1v?

@AllElectronicsChannel

2 жыл бұрын

I think I got confused.. some times I use 0,7 and some times 0,6 as the base voltage

Each class of amplifier depend on bias voltage upon base on the same of amplifier circuit.

so interesting video. can u please teach me how to design amplifier push pull with 80W minima outgoing

Xselent teacher

Awesome explination thank you! I am just a little confused on how the biasing network works when you use a diode to achieve your biasing. Why does the transistor also recieve a 0.7V when the boasing diode has the same. Will you please be able to explain this in a beginner way showing the cutrent flow of this system. Thank you!!

@AllElectronicsChannel

2 жыл бұрын

The diode is in parallel with the base !!

does rf Amplifier Use Class D Amp if yes than its circuit should be much faster than processing Frequency right ?

What is the "chewing" of active device? Can't get it.

Excellent explanation Gregory! Thank you for sharing. Can you demonstrate the diode solution as a method of compensation instead of using a transistor?

@AllElectronicsChannel

3 жыл бұрын

Hello, thank you! I don't have any video about it now. Basically using a diode to generate the DC offset will automatically compensate for the junction voltage to temperature relationship. You need to put the diode VERY close to the transistor (in the same heatsink and side by side) so any increase in temperature of the transistor will be coupled to the diode.

Hi Gregory ... Thank you very much for going by English language in this channel and your explanation on Class A , B , AB was very clear to understand the topology of these classes... But I would to ask if you can rename your channel to have " ( ENGLISH ) " word so it will be much easier for viewers to know than your original Portuguese one , you may add a link to your original channel in the DESCRIPTION for Portuguese speakers if they may be here !.... Also, Can you please correct your LOCATION country in the ABOUT page to be BRAZIL than USA ?

@AllElectronicsChannel

4 жыл бұрын

Hello! I`m retiring from the brazillian KZread as I had some legal problems and will focus only on English markets. This is now my main channel. Over time my english will improve. Thank you!

@ahmedalshalchi

4 жыл бұрын

Hi again ... Even with your planning to retire your Portuguese channel , you still have to rename your new channel with good name like to mark it as " ( ENGLISH ) " and specify the location as from BRAZIL as I could not find any other electronic material channel from Brazil at all except yours and WR Kits since 3-4 years of surfing all over the world of KZread ... Also , I forgot to say , please put all your communication contact links in the ABOUT page with the most priority of Website URL and Email address... Great thanks for improving your channel content....

This is the best explanation I found. Thanks. I have two questions: 1) has the capacitors to be polarity dependent(electrolytic)? In such case, how we can connect the capacitor in series to the load?(is the positive pole on the load or between the two Re?) 2) are the two identical resistors in series with Vbe multiplier used to maintain reverse polarity of collector base of BJTs so that they are in active region? If so, how can we choose their values?

@AllElectronicsChannel

2 жыл бұрын

1) for lower frequencies, probably you will use high value electrolytic capacitors. In this situation, you connect the positive side to the transistor bridge. 2) You can calculate as a voltage divider. The bottom resistor will always have constant 0,65V, so you calculate the upper one to get the desired output voltage.

@stefano.a

2 жыл бұрын

@@AllElectronicsChannel I tried the circuit. Re must be greater (10 Ohms) and transistors heats up too much after some time. With Re=3,9Ohms the transistors was damaged. I will try with bigger transistors

How do I know the amplifier is class A, B, AB

One u have to consider about emitter resistors is u dont want to have voltage drop more than the reverse bias emitter base voltage

@AllElectronicsChannel

2 жыл бұрын

True!

Nice Video.Could you make a video about noname toroid core's calculations values. I mean .Calculation of Al value to permability to other values and measuring effective working frequency and loses .Could you make this kind video?

@AllElectronicsChannel

2 жыл бұрын

Thanks! I can try, core calculations always seems difficult for me also hahaha

Excellent method of explanation.

@AllElectronicsChannel

3 ай бұрын

Many thanks!

So, theoretically it would be best (most thermally stable) to mount the biasing transistors on the same heatsink as the output transistors.

@AllElectronicsChannel

Жыл бұрын

Yep!!

But on the NPN why does the positive swing go through the emitter leg? Isn't that the negative leg of the npn and the collector is the positive leg?

@AllElectronicsChannel

11 сағат бұрын

Read about emitter follower !

does the push pull pair invert the input signal?

@AllElectronicsChannel

Жыл бұрын

No!

Do you know how to explain op ampe 741 in internal circuit transistors working by using wave forms like you explain this..more students are waiting..please if u can

@AllElectronicsChannel

3 жыл бұрын

Nice one!! I will try to make a video about it

Now I understand this Amp from its root

Can someone explain what a high and low impedance signal is?

@AllElectronicsChannel

2 жыл бұрын

It is not a physical correct way o saying, but it helps to understand circuits. I call a high impedance signal, the one the comes from a high impedance source. These are signals "weak", represented by high voltages with low current capacity. Low impedance signals are signals "strong", the comes from low impedance sources.

15:53, I am a little confused because I always thought that class A was a single NPN transistor (one active device) configured as an emitter follower, yet you are showing a two transistor configuration.

@AllElectronicsChannel

2 жыл бұрын

Class A is any configuration wheres the transistor conduction isn't cut!! It is commonly shown with a single transistor, but it's not related to the topology!

@Enigma758

2 жыл бұрын

@@AllElectronicsChannel I didn't know that, I'll bet it's a common misconception. Thank you!

@toadroller

2 жыл бұрын

@@Enigma758 It *is* a common misconception; that exact misconception led me to find this video! I read something about Class A push-pull and I thought "Wait. How can class A be push pull?" and here it is, explained. I believe what you and I previously understood is single-ended class A.

@Enigma758

2 жыл бұрын

@@toadroller Nice to know I'm not the only one who thought that. Thanks for your comment! :)

@Enigma758

2 жыл бұрын

@@AllElectronicsChannel Well then, "electronics-tutorials" must be incorrect then... "Class A Amplifiers are the most common type of amplifier topology as they use just one output switching transistor (Bipolar, FET, IGBT, etc) within their amplifier design. This single output transistor is biased around the Q-point within the middle of its load line and so is never driven into its cut-off or saturation regions thus allowing it to conduct current over the full 360 degrees of the input cycle. Then the output transistor of a class-A topology never turns “OFF” which is one of its main disadvantages."

Look like store of instruments😯

@AllElectronicsChannel

Жыл бұрын

Hahahahha

are you Brazillian?

@AllElectronicsChannel

Жыл бұрын

What?

@lui5sous474

Жыл бұрын

@@AllElectronicsChannel you sounds like a brazillian

Transmitter am sw 2km +

@makroradio6836

2 жыл бұрын

kzread.info/dash/bejne/dGl6krRqkcq6qJM.html

Ic4580

Why do you use 1Mhz signal? not 1Khz? Cheer

@AllElectronicsChannel

2 жыл бұрын

We like to play with higher frequencies !

Your accent is so cute.

@AllElectronicsChannel

2 жыл бұрын

😄😄😄

damn bro save some silly scopes for the rest of us

crackk

I got mind-fucked! Only now I know what the heck 'distortion' and 'crossover' are in this context. I read and heard a lot about them but I do not think there is anyone else explaining them. Few of them even mention use small resistor as the bigger resistor is the more noise will be amplified. To a noob like me, it sounds magical not knowing how come resistor has noise. I am sure those 'tutorials' are meant for noobs, otherwise they will not be bothered with the babyish explanation.

@AllElectronicsChannel

3 жыл бұрын

Thank you man!

@realchristopher4334

3 жыл бұрын

@@AllElectronicsChannel The pleasure is mine! By the way, Gregory, have you any video on how to choose the 'right' values of resistor? I was understood to always choose the smallest resistor to prevent internal noise (I guess it is inherent stray capacitance and inductance. Same story with capacitor, choose the smallest capacitance possible). But again, only one person (The AudioPhool. KZreadr) I found explaining how to calculate the values, sadly he goes too fast and only transistor that he uses as the example. I mean, I would like to know how to choose resistors for an operational amplifier as well because nowadays one small chip can do a lot more, saves much more space, and prevents so much more trouble than messing with discrete devices. About noise, integrated circuits these days have extremely low noise due to everything is in close proximity and internal resistors are microscopic.