Time Stamps for the Different Topics covered in the Video: 0:42 What is Oscillator? 1:04 How OScillator Works? 4:03 Barkhausen Criteria for Oscillations and mathematical derivation 8:12 Different Types of Oscillators
If you spoke your own language, I would understand the lesson better. Instead I am left to figure out what you are trying to say which makes me lose track of the lesson.
you are better than my professor. we don't need to go college or university anymore . since we haves good teacher on UA-cam. thx I understood basic concept of oscillator.
Great explanation. I was actually stuck on the question "how does an oscillator generate sine signal without a sine input?". I thought alot of stuff, considering DC biasing, poles, transients etc, but didnt think of thermal noise. Thank you for this video
Really firstly when I listened this I didn't understood anything..... But, when I red comments I'll just thought .... Is this really understandable🤔... But, when I listened this..... Really it was osmmm....... 😇 I think this comments motivated me alot😄🤞... And Now:Really superb explaination sir😃
Sir your most of vedios are good and informative too I also wanted you to pls pls make a vedio damping types like under, over , critical etc as soon as possible. Thanks for providing these lectures
If AB ->1 the equation Vout = A/(1-AB) goes to infinity based on the math. How is that explained. What controls the change of AB when AB > 0 during startup and AB=1 at steady state. I like the way you analyze circuits.
In the oscillator, there is no input. So, Vin =0. And still, we are getting finite output. And that is only possible in the system when AB= 1. In the video, like I said, the noise will act as input to the oscillator. So actually there is a very small input (in microvolts or even smaller). And as close loop system point of view, it can be said that this very small input will see a very high gain (ideally infinite), which will build up the oscillations. Initially, the gain provided by the amplifier will be such that AB >1, (And actually it can be set by setting the gain of the op-amp). And when the signal reaches some finite voltage then gain provided by the amplifier will change (Due to non-linearity of the amplifier). e.g, if the transistor is used as an amplifier then for the small input it provides very high gain, but as soon as input signal builds up, transistor goes towards saturation, and in saturation, the gain of the transistor will be different. So, this non-linear behavior of the amplifier maintains the loop gain to unity. I hope it will clear your doubt.
If the oscillator can allow only DC signals,then how can we give a sinosoidal signal as input.As u have explained it in this video by using a sine function as input.but how???
Hi , I have a question . Previously we explained like oscillators are not taking any input and works with thermal noise available in the amplifier circuit. I believe , thermal noise used to have multiple frequency wave from. But here my question is :First block diagram tells that , Oscillators are going to take DC input signal ( How thermal noise is related with DC input signal ) .. Don't able to understand.
It will be superimposed in the DC signal as well. The thing is it is very small in amplitude. But due to positive feedback it will get amplified and eventually a particular frequency component will get amplified. I hope it will clear your doubt.
i have one question...15 v input to a 10v zener diode with 1 k resistance in series and also 1k load parallel to zener... then wat is the total current,zener current and load current?
Respected Sir, how is the output Sinusoidal? That is why I came. Do we have proof that the internal noise is "sinusoidal"? So then its amplification by A is also sinusoidal and Beta=1/A in feedback once again puts it back equal in magnitude and phase. OR is it so that both the amplifying blocks are frequency selective? Afterall any signal can be reproduced by addition of n different sine waves. So from the chaotic non sinusoidal internal thermal noise, only a particular frequency is favored by A block. Sorry for making it longer. 5:23 I would like to differ. I think it is the A amplifier block which 'must' be frequency selective as the output of A amplifier is the output of circuit itself.
You make great videos. Thanks! If AB is to be equal to 1, then you need to take the limit as AB goes to 1 in order to not divide by 0 in Vo/Vin = A/1 - AB. Frank Frank Reiser Video/Audio Service
Thank you for knowing your audience and assuming that we know what phase shift is. Just a nitpick, but when you say the feedback has 0 phase shift, is it technically 360 degrees of phase shift, if you know what I mean? The feedback is so far out of phase, it lined back up again?
I had searched many channel on utube . All are idiots time wasters.. Now I find this channel.. is good.. Thanks.. I hate the people who dislike this video.
This disregarded the impulse created by power up conditions for initiating oscillation. This circumstance far outweighs any thermal noise. It also disregards different output waveforms that can be achieved by what the video shows as sinusoidal circuits. Waveform conditioning can also be accomplished by circuits following the oscillator.
Yes, true. We do not apply any ac input to the oscillator. But just to explain the concept of loop gain it has been assumed that some signal is applied to the oscillator.
A lot of radios are run off of 12V DC to be step down from city power. Usually they run off of 4-50W of RF power. It allows for less heat and small components to be used in mobile and portable radios.
Thank you...Sry to ask I have a doubt normally we apply low amount of sinusoidal supply after we remove it and the amplifier amplify the thermal noise and oscillations are produced in desired frequency
Mounika Bandaru DC voltage is easier to control in circuits because it follows a linear constant path, less likely to cause interference with AM and SSB, compatible with diodes and electrolytical capacitors, etc.
can you explain why do we have oscillations in a simulator though the software is noise free, still we see oscillations in softwares like cadence and multisim.
The H115 Oscillator is one of my favorite LMGs in call of duty zombies, so this is a very interesting video to learn the meaning of its name. I am entertained thank you.
In oscillator, with out any external input we are getting output. If vin = 0, then Vout should be zero. But still we are getting output. Actually small noise gets amplified by the oscillator at particular frequency. That means Vin is very very small. And when AB =1, the oscillator provides ideally infinite gain to that small signal. But practically, AB will get limited by the saturation of the amplifier. Initially AB >1, but as signal gets amplified then AB reduces slightly. In short, in the closed loop system the AB is maintained such that we are getting sustained oscillations. I hope it will clear your doubt.
@@ALLABOUTELECTRONICS So the oscillator principle causes thermal noise? And no voltage and current (Vin) need to flow to the amplifier. We need just power the amplifier. Right?
If the oscillator circuit is providing oscillatory output then AB is close to 1. If AB is more than 1, then amplitude would increase gradually and the output will get saturated. If AB is less than 1 then gradually oscillatory output will die out. But since we are getting constant oscillatory output, it means that AB in the circuit is 1. I hope it will clear your doubt.
If you ever need audio mixing or correction for your video let me know. I can even declip an audio signal to a reasonable degree. It would be nice to hear your video, but not clipping and smooth sounding.
Time Stamps for the Different Topics covered in the Video:
0:42 What is Oscillator?
1:04 How OScillator Works?
4:03 Barkhausen Criteria for Oscillations and mathematical derivation
8:12 Different Types of Oscillators
If you spoke your own language, I would understand the lesson better. Instead I am left to figure out what you are trying to say which makes me lose track of the lesson.
Thank you very much
man this guy is amazing ... i thought the Barkhausen criteria was some complicated stuff..he made it so simple in his explanations ....amazing
you are better than my professor. we don't need to go college or university anymore . since we haves good teacher on UA-cam. thx I understood basic concept of oscillator.
I do not know if you are tolling, but I tried real heard to understand but his accent is to deeeep.
Agreed. He is very good and talented teacher
This video is the clearest beginner-friendly explanation of oscillators. Thank you!
9 minute me to pura funda clear kardiya bhai. that's great job 👌👌👌👌
This channel does an amazing job of explaining stuff, I actually get to see how all my classes are combined and applied with these videos!
Great explanation. I was actually stuck on the question "how does an oscillator generate sine signal without a sine input?". I thought alot of stuff, considering DC biasing, poles, transients etc, but didnt think of thermal noise. Thank you for this video
I owe my linear electronics marks to this channel.... Love it man. Keep making videos
I had been wondering from where did the oscillations come from, without any input. Thanks for explaining it here
My 1hr online class = 10 min of ur video....Thank you so much
best vdo regarding introduction to oscillator i have ever seen...more basic knowledge in less time.tnku sir
Bro as clear as water. Really amazing
Your videos helps and and make the concept crystal clear! Thank you!
Excellent sir! Keep making videos coz your videos are very helpful for engineering, especially for ECE students.
Thanks, you are a Collage Diploma saver, great explination. Keep up the good work!
I missed this topic in the class and your explanation was really good and neat.
Thank you
Same here
he is always that good
I miss basically every lectures ever and he saves me
Really firstly when I listened this I didn't understood anything.....
But, when I red comments I'll just thought .... Is this really understandable🤔...
But, when I listened this..... Really it was osmmm....... 😇
I think this comments motivated me alot😄🤞...
And Now:Really superb explaination sir😃
I forgot to add, Congratulation on reaching 50,000 subs ! Your the best.
Sir your most of vedios are good and informative too
I also wanted you to pls pls make a vedio damping types like under, over , critical etc as soon as possible.
Thanks for providing these lectures
Crystal clear explanation 👍
Amazing channel for electronics. .
Thanks 😊 to admin ...
Wow sir you are awesome...you videos are really informative and useful...
I'm learning this from school! I understand how the basic principle of oscillators work! Thank you
What is the concept of ramp up in an oscillator? Also can you make a separate video on amplitude compensation of oscillators?
Thank god for subtitles
what a nice explanation.
Sir,
It's so nice ...
Please make a video about LC oscillations in oscillator....
How they produced( u said normally thermal noise) ..
IN DETAIL
Please give a video on Multivibrator
This video really helped me! Very systematically explained..great job! Thank you!!
Thanku sir for this amazing video..I learn so many things from this.
Great Work Man..! The video was very helpful. Keep making such videos... Good Luck!
thanks alot.u are lighting a light in dark region.
Your way of explanation was good👍
sir you are provided very good information very very thanks
Great video sir
If AB ->1 the equation Vout = A/(1-AB) goes to infinity based on the math. How is that explained. What controls the change of AB when AB > 0 during startup and AB=1 at steady state. I like the way you analyze circuits.
In the oscillator, there is no input. So, Vin =0. And still, we are getting finite output. And that is only possible in the system when AB= 1. In the video, like I said, the noise will act as input to the oscillator. So actually there is a very small input (in microvolts or even smaller). And as close loop system point of view, it can be said that this very small input will see a very high gain (ideally infinite), which will build up the oscillations. Initially, the gain provided by the amplifier will be such that AB >1, (And actually it can be set by setting the gain of the op-amp). And when the signal reaches some finite voltage then gain provided by the amplifier will change (Due to non-linearity of the amplifier). e.g, if the transistor is used as an amplifier then for the small input it provides very high gain, but as soon as input signal builds up, transistor goes towards saturation, and in saturation, the gain of the transistor will be different. So, this non-linear behavior of the amplifier maintains the loop gain to unity.
I hope it will clear your doubt.
Thank you for taking the time for detailed answer. That clears it up for me. Best.
It was like reading from a text book. Please have consideration for beginners to understand.
Hello! If you already had a sinusoidal wave available to give as the input, why did you need an oscillator circuit to generate a sinusoidal wave?
amazing video...Sir can u take class on digital electronics
Soon, I will start the series on digital electronics.
If the oscillator can allow only DC signals,then how can we give a sinosoidal signal as input.As u have explained it in this video by using a sine function as input.but how???
Well, it was shown just to explain the working of the oscillator.
Hi , I have a question . Previously we explained like oscillators are not taking any input and works with thermal noise available in the amplifier circuit. I believe , thermal noise used to have multiple frequency wave from.
But here my question is :First block diagram tells that , Oscillators are going to take DC input signal ( How thermal noise is related with DC input signal ) .. Don't able to understand.
It will be superimposed in the DC signal as well. The thing is it is very small in amplitude. But due to positive feedback it will get amplified and eventually a particular frequency component will get amplified.
I hope it will clear your doubt.
Sir...
Make a video on feedback amplifiers.
Thanks a lot. Great work
I got ful clearance in this topic..you r the best. thanku
super bro well explained the topic ( commited )
i have one question...15 v input to a 10v zener diode with 1 k resistance in series and also 1k load parallel to zener...
then wat is the total current,zener current and load current?
Total current= 7.5 ma
Load current= 7.5 ma
Zener current= 0
All this only when we consider the zener knee current is 0
Thanks for the explanation.
Sorry please I don't understand the latter part of your proving for the thermal noise where you have Bout/Vin = A/1- AB
Better than corona classes
sir can you make videos on feedback amplifiers .In need of them.
Great explanation! Thank you
Make video about transistors...please
As many of you have already asked for it, I will start videos on it soon.
sir,if AB=1,Then how we will get oscillations?
You make great videos
good explanation
Respected Sir, how is the output Sinusoidal? That is why I came.
Do we have proof that the internal noise is "sinusoidal"? So then its amplification by A is also sinusoidal and Beta=1/A in feedback once again puts it back equal in magnitude and phase.
OR is it so that both the amplifying blocks are frequency selective? Afterall any signal can be reproduced by addition of n different sine waves. So from the chaotic non sinusoidal internal thermal noise, only a particular frequency is favored by A block.
Sorry for making it longer. 5:23 I would like to differ. I think it is the A amplifier block which 'must' be frequency selective as the output of A amplifier is the output of circuit itself.
its nice but it explain little with practical or example form may be understandable but not a big deal thanks for making video
You make great videos. Thanks! If AB is to be equal to 1, then you need to take the limit as AB goes to 1 in order to not divide by 0 in Vo/Vin = A/1 - AB.
Frank
Frank Reiser Video/Audio Service
Please make a special videos on problem solving.
The output from the SR flip flop (Q) should be connected to pin 3? Isn't it? Rather it is to the Q complement.
Thank you for knowing your audience and assuming that we know what phase shift is. Just a nitpick, but when you say the feedback has 0 phase shift, is it technically 360 degrees of phase shift, if you know what I mean? The feedback is so far out of phase, it lined back up again?
Great information I like it was so nice.... 🙏🙏🙏🙏🙏
Please add analog communication and digital communications
Thank you for explaining.
Very nicely explained! Tysm sir
eddigudhoda super, i love it
Hai sir ur videos r awesome and which book u refer to prepare?
5:13 , bro thermal noise means
A reverse saturation current in amplifier
Thanks bro....I have been looking for that explanation
I had searched many channel on utube . All are idiots time wasters.. Now I find this channel.. is good.. Thanks.. I hate the people who dislike this video.
You design an amplifier and leave out debugging and you have an oscillator.
Thank you so mucho for this wonderful tutorial.
One thing is still not clear to me, how the |AB| varies from "greater than one" to "equal to one" initial conditions?
amazing video..sir canu take class on digi
Hi man , Thank you so much what an interesting video is this
Sir kindly and heartfully Thank You for the explanation sir 😇
are you from learning lad and neso academy??
plz answer.
This disregarded the impulse created by power up conditions for initiating oscillation. This circumstance far outweighs any thermal noise. It also disregards different output waveforms that can be achieved by what the video shows as sinusoidal circuits. Waveform conditioning can also be accomplished by circuits following the oscillator.
If you go through the playlist on Oscillator, I have already discussed the different ways of the generation.
Thank you 💜
Why isn't tank circuit explained?
sir why we are giving ac input to the amplifier as we know that oscillator coverts DC to AC without any input
Yes, true. We do not apply any ac input to the oscillator. But just to explain the concept of loop gain it has been assumed that some signal is applied to the oscillator.
how can we draw circuits like shown in video as am teaching this subject in online mode ......pls help
Its a request to make video on boolean algebra..
What is use of DC supply in oscillator
A lot of radios are run off of 12V DC to be step down from city power. Usually they run off of 4-50W of RF power. It allows for less heat and small components to be used in mobile and portable radios.
Thank you...Sry to ask I have a doubt normally we apply low amount of sinusoidal supply after we remove it and the amplifier amplify the thermal noise and oscillations are produced in desired frequency
And why we use DC supply
Mounika Bandaru Yeah, we usually use transistors or capacitors/inductors to create different types of sine waves I believe.
Mounika Bandaru DC voltage is easier to control in circuits because it follows a linear constant path, less likely to cause interference with AM and SSB, compatible with diodes and electrolytical capacitors, etc.
can you explain why do we have oscillations in a simulator though the software is noise free, still we see oscillations in softwares like cadence and multisim.
they try to replicate the real elements. Check the settings
How to make an oscillator of required output power, like for 7W.?
The H115 Oscillator is one of my favorite LMGs in call of duty zombies, so this is a very interesting video to learn the meaning of its name. I am entertained thank you.
Sir we oscillate the thermal noise so we get the frequency of thermal noise. How we get the power to the circuit from that frequency
Through DC supply, the oscillator gets the required energy.
@@ALLABOUTELECTRONICS Tq
@@ALLABOUTELECTRONICS sir how the RF oscillator produce more frequency than AF oscillator in both we use same components.
Thank you 😄thank you 😀thank you😍...these videos are so great i really needed them...god bless you🙈😉
How did you just assume AB=1 at 7:45
In oscillator, with out any external input we are getting output. If vin = 0, then Vout should be zero. But still we are getting output. Actually small noise gets amplified by the oscillator at particular frequency. That means Vin is very very small. And when AB =1, the oscillator provides ideally infinite gain to that small signal. But practically, AB will get limited by the saturation of the amplifier. Initially AB >1, but as signal gets amplified then AB reduces slightly. In short, in the closed loop system the AB is maintained such that we are getting sustained oscillations.
I hope it will clear your doubt.
@@ALLABOUTELECTRONICS So the oscillator principle causes thermal noise? And no voltage and current (Vin) need to flow to the amplifier. We need just power the amplifier. Right?
Thank you. That was ... a? very helpful video.
sir, which whiteboard do you used to write and draw the diagrams?
Please do all videos
My mam thought us about , Af=A/(1+Abeta). Taking non inverting amplifier and subtracting , Vin and Vf.🤔
That's a negative feeback circuit. This one's a positive feedback one.
And also Detailed about ADC., Types of ADC....
Sure.
good explanation though
Thanks
NICE SIR
at 7:37 how A*bita is equal to 1, please clear my doubt.
If the oscillator circuit is providing oscillatory output then AB is close to 1. If AB is more than 1, then amplitude would increase gradually and the output will get saturated. If AB is less than 1 then gradually oscillatory output will die out. But since we are getting constant oscillatory output, it means that AB in the circuit is 1. I hope it will clear your doubt.
If you ever need audio mixing or correction for your video let me know. I can even declip an audio signal to a reasonable degree. It would be nice to hear your video, but not clipping and smooth sounding.
VERY NICE