Timestamps for the different topics covered in the video: 0:00 Introduction 1:56 Small Signal Analysis of CS Amplifier (without Source Resistance) 9:00 Small Signal Analysis of CS Amplifier (with Source Resistance) 15:50 Solved Example
@kwekker
3 жыл бұрын
my man I think you just saved my grade. thank u so much
@Tristan-mc4wm
3 жыл бұрын
haha lekker jochem
@SilentHacks-ii4qc
2 жыл бұрын
BEST VIDEO , HONESLTY TOP NOTCH. CLEAR VOICE AND EASY TO UNDERSTAND . Good Job.
@Skylife333
4 ай бұрын
amazing, way better than my coures professor
@mayurshah9131
3 жыл бұрын
EXCELLENT 👍 HEARTLY CONGRATULATIONS AND ALL THE BEST FOR 300K
@薇季芬
Жыл бұрын
0:43 - 0:51 so ,in this configuration ,the small input signal is applied between the gate and the source terminal.在common source組態裡,輸入的小訊號會從 gate terminal到source terminal 0:51 - 0:55 while the output is measured between the drain and the source terminal. 0:55 - 1:02 that means as far as the AC signal is concerned ,then the source terminal is common between the input and the output side. 就ac訊號而言,在輸入端和輸出端都會用到 source terminal 2:51-3:11 That means to perform the AC analysis of any 1.consider all the dc sources in the circuit as zero 2:58-3:02 2.replace all the coupling and bypass capacitors by short circuit 3:02-3:07 3.replace the mosfet by the small signal model 3:07-3:11 4:39 - 4:50 we can say that this input impedance is equal to Vin/Iin=(R1 || R2) 5:04 - 5:10 so,to achieve the high input impedance ,the value of this R1 and R2 should be very high. 6:21-6:25 the ouput is measured between the drain and the source terminal. 6:26 - 6:36 and since this drain current ID is flowing in this anti-clockwise direction ,so we can say that this Vo is equal to -ID*RD. 6:36-6:42 Vo is equal to -ID*RD=-gm*VGS*RD
@よんくみに-h7q
Ай бұрын
9:56 Could u possibly answer my question? Here, I understand output coupling capacitor or input coupling capacitor can be short circuited. But how about capacitor placed between output(drain) to GND? Could u tell me if Such capacitor can also be shorted? I usually see such kind of problems on my old textbook. I might just don’t understand how capacitor should be treated in small signal circuit on a more general circuit. Eg) two resistor R and R’ are connected btw Vdd and drain and the output sensed at drain terminal and there is a capacitor placed btwGND and the point between R and R’.
@dr.vandanakhanna8813
2 жыл бұрын
Very nicely explained. Great job!
@TechnicallyExplained
3 жыл бұрын
Congratulations on 300k subscribers...may you have 400k subscribers within weeks..
@aamir99204
2 жыл бұрын
sir can u please explain why current ID cannot be 5.62 ma
@easywaysgyaan1376
Жыл бұрын
Got it so correctly only because of you ..... Thank you sir ♥️
@shashikantsheoran7312
2 жыл бұрын
At the end of numerical, while calculating voltage gain Av should we consider the value of source resistance i.e. Av=-gm.Rd/(1+gm.Rs)?
@ALLABOUTELECTRONICS
2 жыл бұрын
When the source resistor is not bypassed then only you should consider that equation for voltage gain. If there is a bypass capacitor across the source resistor then it will not appear in the AC analysis. I hope, it will clear your doubt.
@leppuofficial3675
3 жыл бұрын
on 18:39 why 5.62mA not operation in saturation region.. how to recognize it? thank you
@ALLABOUTELECTRONICS
3 жыл бұрын
In that case, if you calculate the Vgs then it is 6V - (1.2) (5.62) = -0.7V. Since Vgs is negative, the N-type MOSFET will operate in the cut-off region. Because for MOSFET to turn on, Vgs should be greater than Vt. I hope it will clear your doubt.
@leppuofficial3675
3 жыл бұрын
@@ALLABOUTELECTRONICS thank you.. all clear sir
@rutwikmore7462
2 жыл бұрын
Explained in very easy way😊. Thank you!!!!
@gss8594
3 жыл бұрын
thank you for clear explaination
@bruhbruh4137
Жыл бұрын
last question why didnt you consider the resistance in source while calculating vout??
@GrindOne69
10 ай бұрын
Dear Sir, @19:19 duration, can't we use formula gm=Id/Vgs?
@ALLABOUTELECTRONICS
10 ай бұрын
You can use that formula, if you know small signal drain current Id (NOT DC drain current) and small signal voltage across gate and source. (Vgs). Practically, if you want to find the transconductance of the MOSFET, then by measuring id and Vgs, you can find that. Here while solving example, since do not know, these values, so we have used other equations of the transconductance.
@murraychen9436
10 ай бұрын
Just want to know the analysis for the same circuit but having signal resource resistance Rsig, rd (or ro) parallel to gm Vgs, and unpassed RS.
@noorsohail1403
3 жыл бұрын
U are the bestttt dudeeeee....❤🌺
@nidhiashok9940
5 ай бұрын
Why did u take gm=2k(Vgs-Vth)?, shouldn't it be k(Vgs-Vth)?
@ALLABOUTELECTRONICS
5 ай бұрын
The drain current Id = 1/2 (μnCox) (W/L) (Vgs - Vt)^2 Or Id = 1/2 (kn) (Vgs - Vt)^2 Where Kn = (μnCox) (W/L) So, after differentiating the above expression, we are getting gm = kn (Vgs - Vt). But here in the question we have been given constant K (not Kn) Where K is the device constant. And it is equal to 1/2 (μnCox) (W/L). So, based on that, here we are getting gm = 2K (Vgs - Vt) I hope, it will clear your doubt.
@dorukilhan4329
8 ай бұрын
so everything is same with bjt's besides K formula ?
@bruhbruh4137
Жыл бұрын
WHY DIDNT YOU CONSIDER R1 AND R2 while calculating vin?? plsssssssssssssssssssss tell i am confusedddddddd
@aravindh06
10 ай бұрын
lot of thanks , i have one doubt why we take 1.11mA not 5.62mA
@ALLABOUTELECTRONICS
10 ай бұрын
If you use Id = 5.62 mA, then VGS will become negative. (Because here VGS = 6 - IDRs). If VGS is negative, then MOSFET is in cut-off region. And hence, the circuit will not operate. And That's why second value of Id (1.11 mA) is chosen. I hope, it will clear your doubt.
@bruhbruh4137
Жыл бұрын
@7:09 isn't Vgs=(R1||R2)Vin
@zackarywang1152
3 жыл бұрын
Thanks. What type of MOSFET we are analyzing in the last example? is it a n-channel depletion type MOSFET? should the Vt be negative or positive?
@ALLABOUTELECTRONICS
3 жыл бұрын
It is n-channel MOSFET. And threshold voltage is positive of n-channel MOSFET.
@zackarywang1152
3 жыл бұрын
@@ALLABOUTELECTRONICS Thanks Boss. Another dump question, is this a depletion type n-channel MOSFET working in the enhancement region?
@haoyuan92
2 жыл бұрын
@@zackarywang1152 Doesn't matter because depletion and enhancement mode only determine whether it is normally on (depletion) or normally off (enhancement).
@arnab94mallick
3 жыл бұрын
Could you please make some good videos on EM theory specially concentrated on Antenna Theory..
@arnab94mallick
3 жыл бұрын
It will be of immense help for us.
@ALLABOUTELECTRONICS
3 жыл бұрын
Yes, once I finish the series on MOSFET, I will definitely consider it.
@mdalmamun6562
3 жыл бұрын
It’s awesome. Thank you 😊
@bagavat21520
Жыл бұрын
How to find the value of c1 and c2 and c3 here
@sachinkumarraghuvanshi5069
Жыл бұрын
what about 30v terminal voltage ,you have considered it no where?
@ALLABOUTELECTRONICS
Жыл бұрын
Would you please mention the timestamp, where you are referring to ??
@pakeru1768
Жыл бұрын
I have question. Why we don't use the Id1 value?
@ALLABOUTELECTRONICS
Жыл бұрын
Would you please mention the time where you are referring in the video ? It would be easy for me to answer your question.
@GrindOne69
11 ай бұрын
Sir, what is Ro?
@ALLABOUTELECTRONICS
11 ай бұрын
It is the output impedance.
@GrindOne69
11 ай бұрын
@@ALLABOUTELECTRONICS output impedance as in external output impedance or the drain resistance?
@ALLABOUTELECTRONICS
11 ай бұрын
@@GrindOne69 It is the output impedance of the MOSFET. (Because of the channel length modulation).
@tompang5296
2 жыл бұрын
19:20 Why is there a 2 in front of the k? The other times I’ve encountered this formula there’s no 2 there…
@ALLABOUTELECTRONICS
2 жыл бұрын
The MOSFET transconductance gm = un Cox (w/L) ( Vgs - Vt) Where, K = 1/2 un Cox ( w/L) That is why there is 2. I hope, it will clear your doubt. For more information, please check the video on MOSFET transconductance. Here is the link : kzitem.info/news/bejne/1qp4uIuBbXmeoHo
@lordgamingyt9405
Жыл бұрын
Sir please upload concepts of vlsi
@ECEVINCENTKUMARL
3 жыл бұрын
Super
@MaheshKumar-sx7oj
Жыл бұрын
Sir if u can provide notes of what ever you have written it will be more useful for us sir
@ALLABOUTELECTRONICS
Жыл бұрын
The notes have been uploaded on the website. Here is the link for some of the MOSFET related notes. www.allaboutelectronics.org/mosfet-tutorials/
@lehieu665
Жыл бұрын
i have a question at 7:44. Are there any other solutions to increase voltage gain but not limit the output swing ?
@maituyetlan614
3 жыл бұрын
Hey teacher, do you have video about AC analysis Mosfet ?
@ALLABOUTELECTRONICS
3 жыл бұрын
Yes, please check this video: kzitem.info/news/bejne/1qp4uIuBbXmeoHo For more info, please check the JFET and MOSFET playlist on the channel.
@pramya7535
2 жыл бұрын
Voltage gain when rs is not bypassed is -1. 690
@kashishkarera7762
3 ай бұрын
Why was Id1 ignored??
@ALLABOUTELECTRONICS
2 ай бұрын
Would you please mention the timestamp where you are referring to in the video?
@studyelectronics3995
3 жыл бұрын
Fabulous👏🏻
@gulamashrafshaikh445
2 жыл бұрын
18:45 why I1 is not the value?
@ALLABOUTELECTRONICS
2 жыл бұрын
With that value, the Vgs will be negative. And in that case, the MOSFET will not conduct. You can put that value in Vgs equation and check. I hope, it will clear your doubt.
@gulamashrafshaikh445
2 жыл бұрын
@@ALLABOUTELECTRONICS yes, thankyou basically Vgs must be greater than Vth for on MOSFET.
@Vishal_Gwall
3 жыл бұрын
I'm second Because Everyone is first 🙃
@Ritik-ww7ro
3 жыл бұрын
For BCEIAN go from 12:00
@sivaprasadnakka6010
Жыл бұрын
Previous video link send me
@ALLABOUTELECTRONICS
Жыл бұрын
It is already given in the description of the video. ( Small signal model) But anyways, here is the link : kzitem.info/news/bejne/1qp4uIuBbXmeoHo
@SuperPaul5000
3 жыл бұрын
How can i calculate r0?
@ALLABOUTELECTRONICS
3 жыл бұрын
From the channel length modulation parameter (lamda) or Early Voltage Va, the Ro can be calculated. If you go through the video on channel length modulation in MOSFET, I have explained there. Moreover, you can also refer the JFET and MOSFET playlist for more solved examples. In some examples, the output resistance is calculated using early voltage or lamda.
@sourcecreator2222
3 жыл бұрын
please no more with this music...
@Avinashkumar-op4ex
3 жыл бұрын
what indicate gm sir?
@ALLABOUTELECTRONICS
3 жыл бұрын
It is the transconductance of the MOSFET. I have made a separate video on it and have explained it in detail. Here is the link: kzitem.info/news/bejne/1qp4uIuBbXmeoHo
@ajayajju5802
3 жыл бұрын
First view
@vlog85773
3 жыл бұрын
Hello sir please Hindi language
@asthagupta6433
10 ай бұрын
bhai kuch smajh nai aata hai presentation ki tarah bna ke khatam kr dete ho yr or wo same pitch pe pura video chlta rehta hai
@zoro.mf69
6 ай бұрын
Very well explained
@प्रणव_गुप्ता
Жыл бұрын
Sir please explain at 18:26 how will solve that quadratic equation in exam it's coefficients values is very large?
@ALLABOUTELECTRONICS
Жыл бұрын
You can use scientific calculator for solving the quadratic equations.
@soumyakkarmakar4783
2 күн бұрын
2500 ta asche kotha diyeeee?????
@besmartknowledgeable
3 жыл бұрын
Hi there
@Harshavardhan-zr2ip
3 жыл бұрын
Sir please complete all biasing of JFET and MOSFET
@NickysonBlah
6 күн бұрын
how tf do u even get 2500Id
@sarangkumarsingh7901
15 күн бұрын
Awesome lecture.....
@vedant6029
3 жыл бұрын
isn't the formula of gm=k*(Vgs-Vt)....where k=unCox*(w/l)?...why have you taken an extra factor of 2 @ 19:42 ?
@ALLABOUTELECTRONICS
3 жыл бұрын
Id = 1/2 (un Cox) (W/L) (Vgs - Vt^2. Or K = 1/2 (unCox)(W/L) Therefore, Id = K (Vgs - Vt)^2 That means gm = ∂Id / ∂Vgs = 2 *K * (Vgs - Vt) I hope it will clear your doubt.
@rajeshwar2109
2 жыл бұрын
@@ALLABOUTELECTRONICS thank you very much
@kgy8088
2 жыл бұрын
perfect
@blake632
8 ай бұрын
If there is ro resistance and Rs resistance, I cannot find how to find Zo. You have not added ro at all.
@bruhbruh4137
Жыл бұрын
@19:00 I HAVE A DOUBT AS TO VERIFY THE VALUE OF ID ?? HOW?? WH DIDNT WE TAKE 5.11 ??? HOW TO CHECK WHETHER THE VALUE OF ID is not valid for given case???
@ALLABOUTELECTRONICS
Жыл бұрын
Vgs= 6V -Id *Rs, where Rs = 1.2 K. If we select the value of Id as 5.62 mA, then Vgs will be negative. It means with that value of Id, MOSFET is off, which is not possible. That is why that cannot be the value of ID. I hope, it will clear your doubt.
@kyriakoskane233
Жыл бұрын
Great job thank you
@aashman_40k
3 жыл бұрын
Where did Rs go in the Small signal model of the solved example? Will it's inclusion change the values of Zin and Zout?
@ALLABOUTELECTRONICS
3 жыл бұрын
Becuase of the bypass capacitor, it will get short circuited in the small-signal analysis. Before the example, I have already shown the expression of input and output impedance with Rs. Please go through the chapters (timestamps) given in the video. You will get it.
@abubakarsiddiq7271
2 жыл бұрын
is it p-channel or n-channel mosfet? if n-channel , what about p-channel. And if finite output impedance (r0) then calculation what?(unbypass Rs)
@ALLABOUTELECTRONICS
2 жыл бұрын
On the channel, if you see MOSFET playlist, you will also find p- channel MOSFET example. Please check that playlist. Most of your doubts will get clear. If you still have any doubts, then let me know here.
@abubakarsiddiq7271
2 жыл бұрын
@@ALLABOUTELECTRONICS I Want to learn p channel MOSFET gain(Av) and Output impedance(Z0) derivation, with internal resistance (small rd),,but here I could not find this.
@sunitsawant885
10 ай бұрын
16:15 i have been given rd =40K ohm how will it affect the Ac analysis diagram and values?
@ALLABOUTELECTRONICS
10 ай бұрын
How about the source resistor? Is it the same or different? First using DC analysis, you need to find the value of gm (transconductance). And then using the formula, or using AC analysis, you can find input, output impedance and gain.
@sunitsawant885
10 ай бұрын
@@ALLABOUTELECTRONICS I found my answer and thank you soo much for the much needed explanation... Truly good.
@dylanzheng2551
2 жыл бұрын
I think at 17:32 in the saturation Id=1/2 * k (V_G- V_T)^2 is this right?
@ALLABOUTELECTRONICS
2 жыл бұрын
Yes, in saturation, Id = 1/2 µn Cox (W/L) (Vgs - Vt)^2 Here, 1/2 µn Cox (W/L) is considered as constant. And that is why the equation is written as K (Vgs - Vt)^2
@dylanzheng2551
2 жыл бұрын
@@ALLABOUTELECTRONICS Thank you so much!! That is really helpful!!
@kwekker
3 жыл бұрын
the quality of this video is super high too, wow
@nthumara6288
Жыл бұрын
what is gm
@ALLABOUTELECTRONICS
Жыл бұрын
It is a Transconductance of the MOSFET. I have already made a seperate video on that. Please check this link : kzitem.info/news/bejne/1qp4uIuBbXmeoHo
@wongyithong9838
3 жыл бұрын
All prayers for the India family.
@pierpa_76pierpaolo
10 ай бұрын
How many times is it able to amplify a sound, noise or music ? How many times? I need an 'audio amplifier with an output of No. 1000 times. I have seen simple dividers with mosfets but they only multiply by 12 times. How to proceed? I am waiting in anticipation. Thank you very much.
@mainakseal5027
Жыл бұрын
lovely explanation...loved it
@sahilthakur279
3 жыл бұрын
Can we use gm=id/vgs for calculating gm because then the value of vgs is totally different
Пікірлер: 110