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Recent content by TicTek

  1. T

    sample and hold spectral response?

    Hi guys, Can anyone help me how the author used convolution to get from equation 2.8 to equation 2.9?
  2. T

    Matlab files for Data Converters by Franco Maloberti

    i have them all. I just need to find the link for you EDIT : I found it. here it is : Maloberti: http://ims.unipv.it/Microelettronica/Dataconverters1.html
  3. T

    is the total noise floor that is made by KTB and Man made noise and phase margin substracte the phase margin?

    Thank you. I am doing a course on coursera from TU DEFT and the teacher put a minus and I could not get my head around it
  4. T

    is the total noise floor that is made by KTB and Man made noise and phase margin substracte the phase margin?

    Hello guys, The total Noise floor that is given by the course I am enrolled now is : Noise Floor = Man_made:noise+KTB-Noise_Margin-----(1) here I think it is a mistake because for me the noise margin is a margin to have a security margin in case our signal drops below and should be written as...
  5. T

    Phase aliasing ambguity and simulation in MatLab?

    Thank you both. Those two arrows are explained as that whenever we have a frequency d which is between certain value, with the violation of Nyquist criteria, we get a phase aliasing. my objective was to simulate that in Matlab for better understanding
  6. T

    Phase aliasing ambguity and simulation in MatLab?

    I understood that. What I am trying to see is how the last 2 case introduce phase aliasing by itself. You did write the -PI/4 in the code, is t phase aliasing happening automatically in case 4 and f? 1659525126 Thank you for your feedback. what I am trying to see by simulating is the phase...
  7. T

    Phase aliasing ambguity and simulation in MatLab?

    Thank you. But the theory here says if I change the sampling frequency without changing f(must be set to 4 as constant) we should observe a phase conjugate due to low sampling rate
  8. T

    Phase aliasing ambguity and simulation in MatLab?

    Hello Guys, So after reading this article Sampling and Aliasing at page 30; I could not reproduce the where the phase has a conjugate value of the origial phase at Fs/2<f<Fs which result in : fa = Fs − f, fa is the aliased frequency Za = Z so my code is here: Fs1=30; % original sampling...
  9. T

    negative feedback loop at -180 and A*B less than 1 stability?

    sorry for my late answer. Was very busy. in the second case, you mentioned that : Corollary, G < 1 then each time thru loop less and less is added to Vs coming out of the summer, and ultimately the loop simple settles to Vs flowing around loop, eg. stable. I do not understand this correctly...
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    negative feedback loop at -180 and A*B less than 1 stability?

    Thanks for your answer, Dana. I am still confused about it. First, if Vs=0 then Vo =Vs*A/(1-AB) which means A/(1-AB) must be different from 0,which means that AB #1!! so where I am getting wrong? second, quote " If you satisfied the angle criteria, 0, or N x 360 degrees (N is integer), but had a...
  11. T

    negative feedback loop at -180 and A*B less than 1 stability?

    Yes, this is what they say but why I cannot prove it by
  12. T

    negative feedback loop at -180 and A*B less than 1 stability?

    Hello everyone, SO I am reading this article on negative feedback and the criteria to be stable. I have not fully understood why if the loop gain at -180degree if the loop gain is less than 1 can be stable. why? because for me when the feedback has a shift phase of -180 and even the loop gain is...

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