I know a lot of the online material on the internet sort of shows this isn't understood and just adds to the confusion, or essentially leaves you to have to fill all the gaps in before you can fully understand what is going on.
@@Zapgod At university? Not really I think :-) At university you learn for 3 months only what is happening at the P-N junction when transistors are not even mentioned. And when you start learning the transistors then you learn these configurations *in details* - certainly not in just a few lessons.
You are a natural teacher. You have the unique ability to transfer all of the key information in a manner easy to understand and to the point. Excellent!
Excellent instruction. I'm studying for the Advanced Amateur Licence (Australia) right now and videos like this one are a great help. Thank you very much.
Even 11 years later, this video is still a great resource. There's one issue I'm having, though: Everytime your phone dinged in the video I looked for my phone thinking I had a notification. The ding sound of your phone sounds nothing like mine- so I have no idea why I even think it's my cell phone. I guess I'm Pavlov's dog.
Many years ago I ran across a circuit in a magazine (remember those? :-) that I just had to try out. It was a single transistor in a common-base configuration that allowed me to use a small 8 ohm speaker as a microphone. Worked well, that did! So that's not just "mostly RF"...
I appreciate your clear and uncluttered presentation. As a software engineer getting back into electronics (after a 35 year hiatus...), it's videos like this that help bring back the tinkering skills I've forgotten. Thank you.
This was a great tutorial for transistor amplifier connections. I never expect it open my mind to deeply understand the connection and the effect of changing the value of resistor as you did in common emitter. Your 11:08 is very valuable for me.Thank you very much
Another great explanation! I had never thought about cascode amps like that, but it makes a lot of sense. Have you ever worked as a teacher/tutor professionally? You'd be the best!
VERY VERY well explained, it's like magic. This directly relates to schematics I've seen for RF circuits and it makes it easier to understand WHY the different setups. Keep them coming Alan!!!
You are awesome, clear and precise, You didn't stumble once or pause and mutter Ah-Ah.Now I understand the miller effect. You explain this better than a college professor.Good presentation, thanks
Just a quick thanks for your really helpful explanations and demonstrations. I understand more in a 10 minute video from you than hours of formula obsessed textbooks. :)
Succinct and well paced. Nice to have the book and lab in combo...separate classes often have a different feel and temperaments especially when lab partners have not done any preparation.
I should comment on your videos more often, as you are awesome. You really fill a niche nobody else covers as well and concise as you do I was wondering where the term "common" originates for these setups and also so I am never confused again, what are all the other names given to these circuit that mean the same, such as emitter follower. Thanks again.
Thanks very much for this video, it was really insightful and helped my understanding of these circuits a great deal. I think it would be great if you were to scan in the pages of tutorials like this, and post them online, so that the viewer is able to "play along at home" and have them for further reference. I for one would really appreciate it! Thanks for the great videos, you're an excellent teacher and have made so many concepts make more sense to me! peace chris
Really you are awesome teacher ever ..... because you are teach with practical....so I humbly request to you jast same type video upload all time... please please please...
I've never heard of a common base amplifier before. Common collector and common emitter I already know, but not common base so I learned something today.
For an emitter follower, it helps to stabilize the collector current with two additional transistors. That way the B-E voltage is constant, the gain is closer to 1, and the already low distortion is even lower.
Very nice. This 11 minute video probably took you 11 hours to prepare. Impressive. Thanks. I like "rules of thumb" for using one configuration versus another. Please consider comparing BJTs to FETs (to Op Amps?) in the future.
Finally a clearcut explanation about the common and different aspects between the three BJT configurations. Might I suggest to maybe give a short explanation about the use of coils (and capacitors), say, in a common emitter configuration, inspired on the same philosophy of this specific video?
I am much obliged for your kindness in preparing the videos and sharing your knowledge. I've been putting together the circuits you present and have been having pretty good luck with them, though I'm getting clipped low end sine waves above 1K htz. Is it impedance problems, is it a voltage attenuation? What to do? It is surprising how a small change in the value of a component often makes a circuit unstable or worse
whiskey two alpha echo whiskey,if you are not an electronics professor you sure could have been. as always a perfect tutorial right on the money!!!! thanks
I am so grateful for people like you who spend time instructing others. Please excuse my ignorance, but what are you referring to when you talk about common? Many thanks.
+John Wilde When you say Common-emitter, Common-base or Common-collector - you are referring to the terminal that is NOT carrying the input or output signal (it is the common reference point). Thus, for a Common-emitter amplifier, the input is the base and the output is the collector, etc.
An Excellent Tutorial. Thank you very much. Keep the good work on and if you have some time for different types of multivibrators , it would be really good. Thanks in Advance.
I don't understand this Common Collector amp, when i measure the output using Oscilloscope there is no voltage gain, but when i measure the output using multimeter there is significant gain from 1V to 9V! Its confuse me 😕 Can someone please explain to me what's going on?
A common collector amplifier does not have any voltage gain, but it does have current gain. It is most commonly used as a buffer amplifier - to take a signal that can't drive a low impedance load and buffer it so that it can drive a low impedance load.
Excellent video! Now I know what to do with all those hunks of silicon with the wires hanging out of them I have behind my stacks of tubes in my basement! You've managed to "wake up" things I learned years ago! RW
Excellent intro tutorial on the amplifiers, Alan! I got a question on that: On the cascode amplifier, the signal passes through the common emitter amplifier first and then passes through the common base...so it seems that the bandwidth reduction effect is still there on the first stage. Is this effect reduced just because the voltage gain (Av) for the common emitter is minus one on the cascode configuration, or something on the common base prevents the inverted signal from being coupled back by the capacitor effect and reduce bandwidth?
mauro sobreira It is because the voltage gain is reduced to -1 on the common emitter stage. This minimizes the Miller Effect. The Miller Effect is the multiplication of the C-B capacitance by the voltage gain. Since the magnitude of the gain is unity, the C-B capacitance doesn't get multiplied like it would in a single common emitter gain stage (without the cascode).
good job! I obtained the reverse. For common emitter the phases of in and out are the same. For common colecter they are shifted by 180 degrees and the same intensity.
This was my first video from your channel and man, from here I can only imagine how much wisdom and knowledge you would have ... So that's why I wanted some guidance - Can you please share some good sources ( books, vids, anything...) for getting the vast knowledge of electronics ? I know experience is a very important part of learning in this field, but here is the thing, how can you get experience if you don't know anything !? I mean How to start ? How you started ? Plz Help this generation of new Electronics Enthisiasts. Pardon my awkward English. Thank you.
Learning is a lifelong process, and it is a different process for everyone since everyone learns things differently. Some people learn best by reading, others by seeing, others by doing. For me, it has been a lot of reading and a lot of doing! When I was a teenager, I poured through the Engineering Notebook series by Forrest Mimms, striving to understand the circuits in them. I worked in a TV repair shop while in high school and learned a lot there. I experimented a lot with electronics, and still do. I also loved reading analog Application Notes from the old National Instruments, Analog Devices, Linear Technologies, Texas Instruments, etc. linear IC manufacturers. Still love books like The Art of Electronics, as well as old books like the Op Amp Cookbook, etc. I studied and received a BSEE degree and have spent the last 35 years in the electronics industry as a design engineer, test engineer, product engineer, validation engineer, application engineer, etc. So, for me there was no single, simple path - it has been (and continues to be) a lifetime of learning - through reading and experience. I can't over-emphasize the power of experience. Start experimenting, keep experimenting - you will fail and fail often, but you LEARN much more from your failures than you do from your successes - so don't let failure discourage you.
This brings back a lot of knowledge that I'd forgotten about since I dropped out of EE school... Especially the common-base circuit. Aren't common-base circuits usually drawn with the base facing down, and aren't common-base circuits also common (pun not intended) in power supplies? I seem to remember seeing and using circuit diagrams that extend the maximum current of a 7805 by letting the 7805 control a 2N3055 power transistor in common-base configuration.
-->Thank you very much for very very nice interesting and educational videos. 'This' video in special, contributed a great deal for a big level-shift for undersigned. Previously only used and known about the ordinary common-'emitter' configuration. ...Now the common-collector(/emitter-follower) config I would guess have a beautiful potensial in own designs. Looks like OpAmps and com.coll.'s(perhaps driven via a driver first?, if current-sensible), seem to have very nice potensials in elelctronics. Again, thank you Alan. br, from Rolf scandinavia, norway. La3epa -thoughNotSoMuchActiveOnHf..for the moment. (Hope one day perhaps try make a hf-contact with you, when practical-conditions for it allows from here later in the future.)
In Common Emitter amplifier configuration it can be seen on scope that when bypassing the Emitter resistor along with huge gain increase there is also more signal distortion, as it should be. Thanks.
I'm confused about the cascode configuration. How does it negate the bandwidth limit of the common emitter? The miller effect is still there right? Doesn't it need to run through the Common emitter first? I initially thought was that you said something wrong and that a common collector feeding a common base would make more sense. Great Video as always.
Great video. Minor error you might want to fix with a caption - at 5:51, you said common emitter instead of common collector. Thanks for the great series.
Everytime I think of an electronic topic I need to better understand, I search your channel first. You are an awesome teacher. Thanks for all you do.
That was 3 months of lectures summarized in 11 mins. Excellent tutorial!
I know a lot of the online material on the internet sort of shows this isn't understood and just adds to the confusion, or essentially leaves you to have to fill all the gaps in before you can fully understand what is going on.
Bro they teach us this in 3 days then test on day 4
@@Zapgod At university? Not really I think :-) At university you learn for 3 months only what is happening at the P-N junction when transistors are not even mentioned. And when you start learning the transistors then you learn these configurations *in details* - certainly not in just a few lessons.
@@ChupoCro in the navy, this is how they train
Ever time I try and teach this part of BJT applications, I end up showing this video. Students really get it.
That's so nice to hear - I'm very glad to know that my work is helping people!
You are a natural teacher. You have the unique ability to transfer all of the key information in a manner easy to understand and to the point. Excellent!
Seriously, this is the BEST transistor explanation on the web. EXCELLENT work!! Thanks.
It's the best I've seen as well. It's crazy how many persons make it more difficult than what it is.
Alan, 9y later I keep rewatching your videos. The best, most concise explanation. You are possibly on the best teachers I ever had.
Thank you, Sir
Excellent presentation. I learned all of this over 30 years ago it is good to see someone teaching this as a needed refresher for this old man.
I realize this was done several years ago, but is by far the MOST LUCID explanation on the three common configurations. Thank you so much!
I just do not have a words to express how I love your videos. Thank you Sir.
Excellent instruction. I'm studying for the Advanced Amateur Licence (Australia) right now and videos like this one are a great help. Thank you very much.
Simple, elegant and efficient. That’s about as good as an explanation can get. Well done!
Even 11 years later, this video is still a great resource. There's one issue I'm having, though: Everytime your phone dinged in the video I looked for my phone thinking I had a notification. The ding sound of your phone sounds nothing like mine- so I have no idea why I even think it's my cell phone. I guess I'm Pavlov's dog.
This video explains the concepts so clearly and concisely. Perfect really.
Now this is teaching! Thank you for uploading! :-)
A very good video, even down to the camera tracking your pen as you moved from circuit to circuit… very impressed! God bless, Bill.
Many years ago I ran across a circuit in a magazine (remember those? :-) that I just had to try out. It was a single transistor in a common-base configuration that allowed me to use a small 8 ohm speaker as a microphone. Worked well, that did! So that's not just "mostly RF"...
I appreciate your clear and uncluttered presentation. As a software engineer getting back into electronics (after a 35 year hiatus...), it's videos like this that help bring back the tinkering skills I've forgotten. Thank you.
This was a great tutorial for transistor amplifier connections. I never expect it open my mind to deeply understand the connection and the effect of changing the value of resistor as you did in common emitter. Your 11:08 is very valuable for me.Thank you very much
Another great explanation! I had never thought about cascode amps like that, but it makes a lot of sense. Have you ever worked as a teacher/tutor professionally? You'd be the best!
Coming from Applied Science that's the best recognition one can have 🙂 Thanks for your great channel you're making the world a better place👍
Wow, yet another superb video..simply the best set of electronics tutorials on UA-cam. Hats off to you sir!
VERY VERY well explained, it's like magic. This directly relates to schematics I've seen for RF circuits and it makes it easier to understand WHY the different setups. Keep them coming Alan!!!
You are awesome, clear and precise, You didn't stumble once or pause and mutter Ah-Ah.Now I understand the miller effect. You explain this better than a college professor.Good presentation, thanks
The content u give is so thorough and wholesome. solid lesson, thanks so much!
Just a quick thanks for your really helpful explanations and demonstrations. I understand more in a 10 minute video from you than hours of formula obsessed textbooks. :)
Succinct and well paced. Nice to have the book and lab in combo...separate classes often have a different feel and temperaments especially when lab partners have not done any preparation.
Clear, concise and well structured explanation. I am impressed, thank you for making these!
You got the best tutorial basics of transistors! No one else seems to show the real thing. You got both! Great video! It helped a ton.
You are an uncommon teacher.
Thanks, love your videos. By far some of the best electronics explanations/tutorials on youtube.
I should comment on your videos more often, as you are awesome. You really fill a niche nobody else covers as well and concise as you do
I was wondering where the term "common" originates for these setups and also so I am never confused again, what are all the other names given to these circuit that mean the same, such as emitter follower. Thanks again.
Great video! A common base amplifier is also great as a preamp for a low impedance microphone. Low noise, high gain.
A good refresher course,amazing what I forget over a weekend.
Thanks very much for this video, it was really insightful and helped my understanding of these circuits a great deal.
I think it would be great if you were to scan in the pages of tutorials like this, and post them online, so that the viewer is able to "play along at home" and have them for further reference. I for one would really appreciate it!
Thanks for the great videos, you're an excellent teacher and have made so many concepts make more sense to me!
peace
chris
way to break it down in a clear, easy-to-understand manner. cheers!
Awesome video -- as a beginner, this sort of explanation is priceless. Many thanks.
Perfect video! THanks you a lot. It is very clear and I like how you showed the example on the oscilloscope right away.
I never get tired of watching.
thank you so much for this video i love the way you explain how CB,CE,CC works.
nice job BRAVO
I know that this video has been around for some time but it has been really really helpful.
Great video! I just learned this in class it it was awesome to have you wrap it up.
Ideal.Best way to learn by practical approach, lesson to future. Thank you SIR.
Excellent exposition. Good effort expended in your videos . Well done. Thank you.
Really you are awesome teacher ever ..... because you are teach with practical....so I humbly request to you jast same type video upload all time... please please please...
I've never heard of a common base amplifier before. Common collector and common emitter I already know, but not common base so I learned something today.
I got terrble grade on my electronic course 20 yrs ago. I wish you were my teacher back then. I would have love electronic.
For an emitter follower, it helps to stabilize the collector current with two additional transistors. That way the B-E voltage is constant, the gain is closer to 1, and the already low distortion is even lower.
awesome demo, especially for the common base. Thanks fot the great content sharing!👍👍
The common base is the hardest for me to employ.
Excellent explanation and tutorial!
Ooh...I could have used some of this for my Electronics exam this morning. I love your videos!
Great explanation, very nice balance of basic things with some more advanced info.
Great video. Very nicely explained.
Thanks for the tutorial! This is going to help me a lot designing my amplifier.
WOW WOW WOW a BIG thank you. I really appreciate all your videos but the BASIC one are out of this world. My hat off ! :-)
I second this! I'd love to have an in depth explanation of input and output impedance.
keep up the great work!
peace
Very nice. This 11 minute video probably took you 11 hours to prepare. Impressive. Thanks. I like "rules of thumb" for using one configuration versus another. Please consider comparing BJTs to FETs (to Op Amps?) in the future.
Finally a clearcut explanation about the common and different aspects between the three BJT configurations. Might I suggest to maybe give a short explanation about the use of coils (and capacitors), say, in a common emitter configuration, inspired on the same philosophy of this specific video?
Thank you! Very clearly explained and shown experimentally.
I am much obliged for your kindness in preparing the videos and sharing your knowledge. I've been putting together the circuits you present and have been having pretty good luck with them, though I'm getting clipped low end sine waves above 1K htz. Is it impedance problems, is it a voltage attenuation? What to do?
It is surprising how a small change in the value of a component often makes a circuit unstable or worse
whiskey two alpha echo whiskey,if you are not an electronics professor you sure could have been. as always a perfect tutorial right on the money!!!! thanks
I am not an electronics professor - I just play one on UA-cam! Ha!
***** I am very grateful that you do, you have taught me so much already. I really like you tutorials, I learn more from them. thanks
I wish I had him Navy Electronics Technician School years ago.
Thanks for the good vid man!!! Im in 4th grade and working with transistors for the first time! Helps me alot!!!
I am so grateful for people like you who spend time instructing others. Please excuse my ignorance, but what are you referring to when you talk about common?
Many thanks.
+John Wilde When you say Common-emitter, Common-base or Common-collector - you are referring to the terminal that is NOT carrying the input or output signal (it is the common reference point). Thus, for a Common-emitter amplifier, the input is the base and the output is the collector, etc.
+w2aew Many thanks! I am getting there, albeit slowly. You are a great patient teacher.
Best video I have ever seen on transistors 👍👏👏
Another outstanding video. Useful information for all. Thanks.
I appreciate and enjoy this tutorial very much, Thank You!
Beleive me, you have a gift to explain electronics.
Dear Sir you give us a lot information in your tutorial i like it very much thanks
An Excellent Tutorial. Thank you very much. Keep the good work on and if you have some time for different types of multivibrators , it would be really good. Thanks in Advance.
I don't understand this Common Collector amp, when i measure the output using Oscilloscope there is no voltage gain, but when i measure the output using multimeter there is significant gain from 1V to 9V!
Its confuse me 😕
Can someone please explain to me what's going on?
A common collector amplifier does not have any voltage gain, but it does have current gain. It is most commonly used as a buffer amplifier - to take a signal that can't drive a low impedance load and buffer it so that it can drive a low impedance load.
Excellent explanation, thanks, perfect primer before starting on EMRFD.
love your videos, always learned a lot in a short period of time, winner tutorials !!
Thank you so much for making my concepts more clear...
Yet another great review. Thanks, Alan.
Excellent video! Now I know what to do with all those hunks of silicon with the wires hanging out of them I have behind my stacks of tubes in my basement! You've managed to "wake up" things I learned years ago! RW
Thanks a lot, greetings from Argentina!
Best explanation , i think yes, thanks for making this video
Thank you for a very well made tutorial :) Are those glossary notes you are using accessible somewhere?
Excellent intro tutorial on the amplifiers, Alan! I got a question on that: On the cascode amplifier, the signal passes through the common emitter amplifier first and then passes through the common base...so it seems that the bandwidth reduction effect is still there on the first stage. Is this effect reduced just because the voltage gain (Av) for the common emitter is minus one on the cascode configuration, or something on the common base prevents the inverted signal from being coupled back by the capacitor effect and reduce bandwidth?
mauro sobreira It is because the voltage gain is reduced to -1 on the common emitter stage. This minimizes the Miller Effect. The Miller Effect is the multiplication of the C-B capacitance by the voltage gain. Since the magnitude of the gain is unity, the C-B capacitance doesn't get multiplied like it would in a single common emitter gain stage (without the cascode).
***** Crispy clear, Thanks!
WHERE TO FIND THE DETAILS....??
You explain the best way.
Very nice videos with full of information - thanks!
good job! I obtained the reverse. For common emitter the phases of in and out are the same. For common colecter they are shifted by 180 degrees and the same intensity.
What is the transistor number 2n3904 ?
Any common NPN transistor like the 2n3904, 2n2222, etc. can be used in these examples.
Thanks for even including the drawings!
This was my first video from your channel and man, from here I can only imagine how much wisdom and knowledge you would have ...
So that's why I wanted some guidance -
Can you please share some good sources ( books, vids, anything...) for getting the vast knowledge of electronics ? I know experience is a very important part of learning in this field, but here is the thing, how can you get experience if you don't know anything !? I mean How to start ? How you started ?
Plz Help this generation of new Electronics Enthisiasts.
Pardon my awkward English.
Thank you.
Learning is a lifelong process, and it is a different process for everyone since everyone learns things differently. Some people learn best by reading, others by seeing, others by doing. For me, it has been a lot of reading and a lot of doing! When I was a teenager, I poured through the Engineering Notebook series by Forrest Mimms, striving to understand the circuits in them. I worked in a TV repair shop while in high school and learned a lot there. I experimented a lot with electronics, and still do. I also loved reading analog Application Notes from the old National Instruments, Analog Devices, Linear Technologies, Texas Instruments, etc. linear IC manufacturers. Still love books like The Art of Electronics, as well as old books like the Op Amp Cookbook, etc. I studied and received a BSEE degree and have spent the last 35 years in the electronics industry as a design engineer, test engineer, product engineer, validation engineer, application engineer, etc. So, for me there was no single, simple path - it has been (and continues to be) a lifetime of learning - through reading and experience. I can't over-emphasize the power of experience. Start experimenting, keep experimenting - you will fail and fail often, but you LEARN much more from your failures than you do from your successes - so don't let failure discourage you.
@@w2aew Thank you very much for your kind words and your time. Very motivating.
Great video very helpful, more like this would be grate.
Awesome tutorial. thank you so much
Hi, can you make a tutorial on how you can tie up multiple CC, CE and CB to make a decent small signal amplifier?
This brings back a lot of knowledge that I'd forgotten about since I dropped out of EE school... Especially the common-base circuit.
Aren't common-base circuits usually drawn with the base facing down, and aren't common-base circuits also common (pun not intended) in power supplies? I seem to remember seeing and using circuit diagrams that extend the maximum current of a 7805 by letting the 7805 control a 2N3055 power transistor in common-base configuration.
amazing explanation ! thank you
The best ever explained..!
Thanks sir
-->Thank you very much for very very nice interesting and educational videos.
'This' video in special, contributed a great deal for a big level-shift for undersigned.
Previously only used and known about the ordinary common-'emitter' configuration.
...Now the common-collector(/emitter-follower) config I would guess have a beautiful potensial in own designs.
Looks like OpAmps and com.coll.'s(perhaps driven via a driver first?, if current-sensible), seem to have very nice potensials in elelctronics.
Again, thank you Alan.
br, from Rolf
scandinavia, norway.
La3epa -thoughNotSoMuchActiveOnHf..for the moment.
(Hope one day perhaps try make a hf-contact with you, when practical-conditions for it allows from here later in the future.)
Very good ... please post for FET & MOSFET also
please do!
Brilliant! Thank you so much.
In Common Emitter amplifier configuration it can be seen on scope that when bypassing the Emitter resistor along with huge gain increase there is also more signal distortion, as it should be. Thanks.
I'm confused about the cascode configuration. How does it negate the bandwidth limit of the common emitter? The miller effect is still there right? Doesn't it need to run through the Common emitter first? I initially thought was that you said something wrong and that a common collector feeding a common base would make more sense. Great Video as always.
lovely, things become more clear now. 😊
With class C RF amp, can you explain how it can be used/ modified to an AM or FM transmitter, BTW your tutorials are very clear and easy to grasp.
Best explanation I have seen! 73's
Great video. Minor error you might want to fix with a caption - at 5:51, you said common emitter instead of common collector. Thanks for the great series.
Thank you! Excellent teaching indeed
Thank you! This helped me so much.