I was thinking about making a video about the CMRR After watching this video, I decided to pick a different direction for when I make a video for the first time This video was so professional, it made me change my mind! Thankful that you are spending effort on these, its not always that someone who knows these topics and can view them in this particular way, is able and successful in making them into videos
Very nice video on common mode and differential mode. If you’ve not already done so, I would enjoy a video on voltage mode sensors versus current mode sensors and the advantages/disadvantages of each. Thank you!
Thanks a lot! nice. Unfortunately I didn't understand your explanation about the application. I use the Common Mode Rejection (CMR) in signal sensing, to reduce the error (higher SNR).
Common-mode rejection doesn't strictly-speaking improve your SNR. Any *differential* noise at the input is still amplified just like your signal. It is only if your noise is *common* to both inputs and the signal you are trying to record is differential that a high common-mode rejection can help alleviate noise. This is often the case with things like 60Hz noise. If both your "signal" and "noise" are common-mode signals, however, then CMRR also doesn't help.
So in make use of symmetry in circuit analysis, you mean that every symmetric signal (both signal are same) we can get rid off or don't have to account these anymore?
Hello Mr. Edmunds, could you add video about solving complex MOS circuit which may includes current mirrors, current source, cascode stages, differential pairs.. Such as solving width over length each MOS.
How does this differ from the common mode voltage reported on the data sheets? My understanding is that input/output common mode voltage refers to the range of voltages that the input or output can support with respect to the supply voltage, lest the device stop working properly. What your describing seems to be completely different from this op amp characteristic
Interesting ! thanks for the explanation. So how is V1 and V2 measured on an actual circuit ? is it by probing +IN and VCC to get V1 and probing (-)IN and V(-) to get V2.
Hi, I looked up for the differential mode voltage, and it seems that the equation is: Vdm=V1-V2 (not divided by 2). Is this equation applying to different situation than showed in the video? Thank you.
Hey, I have the same question. My prof in my Semiconductor Class also did not devide the Vdm by two. Have you come upon an answer since you asked the question or are you also still wondering?
I am a chemistry graduate student recently trying to build or optimizing an electrical machine and I am figuring out something related with noise issue. I am studying potential or current signaling stuff now.
we would expect VCM to be 1V! lol i love it. Why would you "expect" VCM to be one volt. This is the problem with youtube. assumptions and more assumptions. You do not explain in the slightest why you would "expect" VCM to be 1 V
A better choice of words might be "suppose it's 1V". Integrated circuits almost always operate off voltages between 1V and ~20V, so 1V is an at-least-not-implausible guess. It also just makes it easy to talk about, it's the simplest number.
"in engineering we almost always drop the axis" I dont know what crazy ass engineering you practice but in REAL engineering we never drop the axis or the units. You are just off in lala land man
Ah, sure, clarification: When explaining things qualitatively we often drop the labels on the axis, as they aren't relevant to the general point being made (i.e. it doesn't matter if a sinewave is at 1kHz or 10GHz, the graph will look exactly the same when scaled and the conclusions are the same).
I was thinking about making a video about the CMRR
After watching this video, I decided to pick a different direction for when I make a video for the first time
This video was so professional, it made me change my mind!
Thankful that you are spending effort on these, its not always that someone who knows these topics and can view them in this particular way, is able and successful in making them into videos
You're awesome! I feel like I can just become an engineer by watching all your videos.
Very nice video on common mode and differential mode. If you’ve not already done so, I would enjoy a video on voltage mode sensors versus current mode sensors and the advantages/disadvantages of each. Thank you!
Excellent. Very basic thing but much needed concept for circuit designers.
Thanks a lot! nice.
Unfortunately I didn't understand your explanation about the application.
I use the Common Mode Rejection (CMR) in signal sensing, to reduce the error (higher SNR).
Common-mode rejection doesn't strictly-speaking improve your SNR. Any *differential* noise at the input is still amplified just like your signal. It is only if your noise is *common* to both inputs and the signal you are trying to record is differential that a high common-mode rejection can help alleviate noise. This is often the case with things like 60Hz noise. If both your "signal" and "noise" are common-mode signals, however, then CMRR also doesn't help.
So in make use of symmetry in circuit analysis, you mean that every symmetric signal (both signal are same) we can get rid off or don't have to account these anymore?
Instructive video. Thank you for posting !
Hello Mr. Edmunds, could you add video about solving complex MOS circuit which may includes current mirrors, current source, cascode stages, differential pairs.. Such as solving width over length each MOS.
@JordanEdmunds
yes we really appreciate it...
Really enjoyed... thank you for sharing the video
Excellent! Can you tell why V1 biased at 1V with amplitude of 0.4v in the plot but your equation is V1= 1V + 0.5V sin wt? Thank you.
Excellent catch, thanks! It should be 0.5V on the graph as well.
Good Job, Go to front of the class.
Sloppy
Can you please tell any example of practical situation, or practical circuit using diff amp pair.
Very good explanation! Which drawing program did you use for the presentation?
How does this differ from the common mode voltage reported on the data sheets? My understanding is that input/output common mode voltage refers to the range of voltages that the input or output can support with respect to the supply voltage, lest the device stop working properly. What your describing seems to be completely different from this op amp characteristic
All info seems to be very new to me.
hello Jordan can you please make a video about the small signal analysis of the Differential mode please
Interesting ! thanks for the explanation. So how is V1 and V2 measured on an actual circuit ? is it by probing +IN and VCC to get V1 and probing (-)IN and V(-) to get V2.
Hi, I looked up for the differential mode voltage, and it seems that the equation is: Vdm=V1-V2 (not divided by 2). Is this equation applying to different situation than showed in the video? Thank you.
Hey, I have the same question. My prof in my Semiconductor Class also did not devide the Vdm by two. Have you come upon an answer since you asked the question or are you also still wondering?
@@AndersAlsDieAnderen9 I think that differential mode is difference between two signals, so the equality should be V1-V2.
can you explain maximum and minimum Vcm? i can't wrap my head around that
I am a chemistry graduate student recently trying to build or optimizing an electrical machine and I am figuring out something related with noise issue. I am studying potential or current signaling stuff now.
Cool! Welcome to EE :)
Hi.I like your video very much. It's really great. I'll keep an eye on your channel. I am your fan and I will support you.
Can you add video about CMRR and PSRR for diff amp with explaination?
This really helps thanks
Good explanation....
Thank u Sir
So we’ll explained
God Bless
Are we biasing the circuit with vcm pls explain the difference in ac current and dc in this circuit
I do not really get what is the need to divide by 2 in the differential mode
great video
Hello sir i am using stm32 f401 black pill but ADC value of microcontroller fluctuate a lot even on dc input, how to improve it thanks
Hello Sir, what is a differential probe in Oscilloscopes?
Sir what book are you refered in this topic
Thank you sir,giod explanation
Internal circuit working of 741 ic
Polarity and phase are two different things!
what is negative feedback in bjt op amp ?
Great explanation!
Thanks!
awsome...
So nice
thanks
But why use current source at bottom
Misuse of symbols, looks like its supposed to represent the output
this could use a demo
we would expect VCM to be 1V! lol i love it. Why would you "expect" VCM to be one volt. This is the problem with youtube. assumptions and more assumptions. You do not explain in the slightest why you would "expect" VCM to be 1 V
A better choice of words might be "suppose it's 1V". Integrated circuits almost always operate off voltages between 1V and ~20V, so 1V is an at-least-not-implausible guess. It also just makes it easy to talk about, it's the simplest number.
"in engineering we almost always drop the axis" I dont know what crazy ass engineering you practice but in REAL engineering we never drop the axis or the units. You are just off in lala land man
Ah, sure, clarification: When explaining things qualitatively we often drop the labels on the axis, as they aren't relevant to the general point being made (i.e. it doesn't matter if a sinewave is at 1kHz or 10GHz, the graph will look exactly the same when scaled and the conclusions are the same).
Poor explanation