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Recent content by serimc

  1. S

    Differences Between Magnetic Field and Magnetic Wave?

    Hi I have some confusions about Electric and Magnetic fields and waves basics. First of all, Is that diagram fully correct? Are electric field and electric wave the same thing? And are magnetic wave and magnetic field the same thing? I mean every magnetic field is a part of a wave? If not...
  2. S

    Differences between reference signal and VCO signal (PLL)

    Thank you FoxyRick Are these 2 oscillators (VCO and reference signal oscillator) different? In fact I was trying to ask why is there a such complex structure(2 oscillator+divider+phase comp...) is using to generate a signal? If you want to increase the signal frequency, you already have a...
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    Differences between reference signal and VCO signal (PLL)

    **broken link removed** PLL Documentations say that if pll is used as a frequency synthesizer, VCO is used with frequency divider. Why? Why do we need a pll for this purpose? (I mean a VCO) A reference oscillator signal is there already. We can add a divider so it becomes another...
  4. S

    Are 2 same signals can be orthogonal?

    For example Are sin(2Πfct) and sin(2Πfct) orthogonal for one period? Is this possible? Does that have mathematical expression?
  5. S

    EM Effect in universe

    Hard question? or Coldn't i explain what i mean? For example there is a comet that will crush to earth. Can we stop it with exploiting a nuclear bomb in space? Do we need atmosphere or any environment? What formula show us Eloctromagnetic waves effect.Is it depend on environment?
  6. S

    EM Effect in universe

    Hi I want to ask you about EM effect in space. For example we exploit a nuclear bomb both in space and in world(atmospheric environment). Which one is spread more effect than other. I mean does EM radiation dependt on environment? Which formula shows us this dependency? Thanks.
  7. S

    what is the meaning of taylor series

    thanks mahematician you said: "taylor series is a fundamental concept in analysis and the beauty of it is with the help of it we can represent any trigonometric function in terms of algebraic expansions( that is in terms of polynomial expansions or series)" Actually i don't understand this...
  8. S

    what is the meaning of taylor series

    meaning of taylor function Hi we know the sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse. But in taylor series there is a differnet explanation ( https://mathworld.wolfram.com/TaylorSeries.html ).I can't relate between trigonometric meaning and...
  9. S

    what is the maning of e^jw in fourier transform?

    ok thanks for all answers They are very helpful. I have one more and last question. why 2.71828^iQ id equal to cosQ+ isinQ.I mean why 2.71828.why not 10 or 53 but 2.71828. There is no relationship between 2.71828 and cos-sin.But they are two part of an equation and 2.71828^iQ is equal to cosQ+...
  10. S

    what is the maning of e^jw in fourier transform?

    thanks this analogy , i need such expression. So can we say that this multiplying operation is not numeric multiplying.(Like 3*4=12) This must be different because this multiplication and then integration returns me a vector not a numeric value.Is this true?I wonder the magic behind this...
  11. S

    what is the maning of e^jw in fourier transform?

    Ok thanks mayyan. So what is the meaning of multiplying a func. with 2.71^iQ=CosQ+iSinQ?( I know we use it for frequency represantation of a signal.But i don't know its meaning.What is the magic behind this calculation) Thanks again
  12. S

    what is the maning of e^jw in fourier transform?

    thanks for your warn me2please It must be e^iQ = cosQ+ isinQ=2.71828^iQ.Is this true?In fourier transform e is really 2.71828 or before i said only a represantation of a complex number or something else? Can you please give answer to my questions(or correct my explanantions).I need some...
  13. S

    what is the maning of e^jw in fourier transform?

    Sorry amiralib , i can't find my questions' answers in taylor series formula. I want to add one more question to my last post, an explanantion: "For example think a cup , it is shapeless.How can we calculate its volume?We can't use scale but we can use water.Here water represent 3D but scalet...
  14. S

    what is the maning of e^jw in fourier transform?

    thanks friend I passed signals and systems lesson last year but i memorized everything.I know that i still don't understand the meaning of multiplying a signal with e^jw and then taking its integral.( or i can't imagine it.) Ok. e is 2.71828 and also e is cosQ+ isinQ. But one of them is...
  15. S

    what is the maning of e^jw in fourier transform?

    Hi In fourier transform i don't understand the meaning of e number? We know e number is =2.71828 But in fourier e^iQ = cosQ+ isinQ , (I understan that it means a complex number if wrong please correct it) Is this e 2.71828 or is it only a sembol.Is it not "e" number? I can not solve what the...
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