Differential and Common Mode Signals

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  • เผยแพร่เมื่อ 21 พ.ย. 2024

ความคิดเห็น • 57

  • @ohayuhanna
    @ohayuhanna 4 ปีที่แล้ว +4

    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

  • @kevinchau5336
    @kevinchau5336 4 ปีที่แล้ว +10

    You're awesome! I feel like I can just become an engineer by watching all your videos.

  • @hubercats
    @hubercats 4 ปีที่แล้ว +3

    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!

  • @SouravChandaElectronics23
    @SouravChandaElectronics23 4 ปีที่แล้ว

    Excellent. Very basic thing but much needed concept for circuit designers.

  • @kayliman
    @kayliman 6 ปีที่แล้ว +2

    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).

    • @JordanEdmundsEECS
      @JordanEdmundsEECS  6 ปีที่แล้ว

      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.

    • @kayliman
      @kayliman 6 ปีที่แล้ว

      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?

  • @agstechnicalsupport
    @agstechnicalsupport 2 ปีที่แล้ว

    Instructive video. Thank you for posting !

  • @yusufklc1184
    @yusufklc1184 5 ปีที่แล้ว +15

    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.

    • @iteshbharti8560
      @iteshbharti8560 5 ปีที่แล้ว

      @JordanEdmunds
      yes we really appreciate it...

  • @vikasgupta-hl9sq
    @vikasgupta-hl9sq ปีที่แล้ว

    Really enjoyed... thank you for sharing the video

  • @steveisthegod7684
    @steveisthegod7684 6 ปีที่แล้ว +9

    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.

    • @JordanEdmundsEECS
      @JordanEdmundsEECS  6 ปีที่แล้ว +8

      Excellent catch, thanks! It should be 0.5V on the graph as well.

    • @BADALICE
      @BADALICE 4 ปีที่แล้ว +5

      Good Job, Go to front of the class.

    • @maggotbrain7499
      @maggotbrain7499 2 ปีที่แล้ว +1

      Sloppy

  • @prashantupadhyay5110
    @prashantupadhyay5110 4 ปีที่แล้ว +1

    Can you please tell any example of practical situation, or practical circuit using diff amp pair.

  • @ne555at
    @ne555at 2 ปีที่แล้ว

    Very good explanation! Which drawing program did you use for the presentation?

  • @JohnnyJohnson869
    @JohnnyJohnson869 2 ปีที่แล้ว +1

    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

  • @X_is_learning
    @X_is_learning 4 ปีที่แล้ว

    All info seems to be very new to me.

  • @sayajinppl417
    @sayajinppl417 2 ปีที่แล้ว

    hello Jordan can you please make a video about the small signal analysis of the Differential mode please

  • @gtag174
    @gtag174 4 ปีที่แล้ว +3

    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.

  • @noa_ht
    @noa_ht 2 ปีที่แล้ว +4

    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.

    • @AndersAlsDieAnderen9
      @AndersAlsDieAnderen9 2 ปีที่แล้ว +2

      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?

    • @yunusemreozdemir1342
      @yunusemreozdemir1342 2 ปีที่แล้ว +2

      @@AndersAlsDieAnderen9 I think that differential mode is difference between two signals, so the equality should be V1-V2.

  • @fazlerabbi2666
    @fazlerabbi2666 5 ปีที่แล้ว +1

    can you explain maximum and minimum Vcm? i can't wrap my head around that

  • @X_is_learning
    @X_is_learning 4 ปีที่แล้ว

    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.

  • @pronounceword
    @pronounceword 4 ปีที่แล้ว

    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.

  • @srinivasan7790
    @srinivasan7790 5 ปีที่แล้ว +3

    Can you add video about CMRR and PSRR for diff amp with explaination?

  • @selimyuksektepe1165
    @selimyuksektepe1165 3 ปีที่แล้ว

    This really helps thanks

  • @rmohand.v3601
    @rmohand.v3601 3 ปีที่แล้ว

    Good explanation....

  • @andrewpervez3009
    @andrewpervez3009 ปีที่แล้ว

    Thank u Sir
    So we’ll explained
    God Bless

  • @rohankademani6406
    @rohankademani6406 4 ปีที่แล้ว

    Are we biasing the circuit with vcm pls explain the difference in ac current and dc in this circuit

  • @MarioVladutTino
    @MarioVladutTino 17 วันที่ผ่านมา

    I do not really get what is the need to divide by 2 in the differential mode

  • @mr.hibster9603
    @mr.hibster9603 ปีที่แล้ว

    great video

  • @ilovekheti2812
    @ilovekheti2812 2 ปีที่แล้ว

    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

  • @nihiljoshi3537
    @nihiljoshi3537 5 ปีที่แล้ว

    Hello Sir, what is a differential probe in Oscilloscopes?

  • @dhanushdb6241
    @dhanushdb6241 3 ปีที่แล้ว

    Sir what book are you refered in this topic

  • @sandunisulochana2304
    @sandunisulochana2304 4 ปีที่แล้ว

    Thank you sir,giod explanation

  • @miqbal7032
    @miqbal7032 3 ปีที่แล้ว

    Internal circuit working of 741 ic

  • @ydonl
    @ydonl 5 ปีที่แล้ว

    Polarity and phase are two different things!

  • @rvnreddy3929
    @rvnreddy3929 5 ปีที่แล้ว

    what is negative feedback in bjt op amp ?

  • @nicktyler1836
    @nicktyler1836 6 ปีที่แล้ว +1

    Great explanation!

  • @sam-pd6zi
    @sam-pd6zi 9 หลายเดือนก่อน

    awsome...

  • @kabandajamir9844
    @kabandajamir9844 2 ปีที่แล้ว

    So nice

  • @ianlouzada
    @ianlouzada 4 ปีที่แล้ว

    thanks

  • @rohankademani6406
    @rohankademani6406 4 ปีที่แล้ว

    But why use current source at bottom

    • @rokiedecentra9656
      @rokiedecentra9656 2 ปีที่แล้ว

      Misuse of symbols, looks like its supposed to represent the output

  • @xandersafrunek2151
    @xandersafrunek2151 3 ปีที่แล้ว

    this could use a demo

  • @JohnSmith-ed1sr
    @JohnSmith-ed1sr 3 ปีที่แล้ว

    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

    • @JordanEdmundsEECS
      @JordanEdmundsEECS  2 ปีที่แล้ว

      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.

  • @JohnSmith-ed1sr
    @JohnSmith-ed1sr 3 ปีที่แล้ว

    "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

    • @JordanEdmundsEECS
      @JordanEdmundsEECS  2 ปีที่แล้ว

      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).

  • @anushakambampati936
    @anushakambampati936 4 ปีที่แล้ว

    Poor explanation