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Recent content by wangsx

  1. W

    Formula for calculating nyqist frequency

    nyqist frequency ? we can not determine the nyqist frequency of a singal if we only know the signal freq itself instead of the sample freq. or we can say the nyqist frequency is the signal freq itself(fi) so we can use the sampls signal freq greater than 2*fi to get a reconstuctable sample.
  2. W

    Question about the waves sinusoidalis

    waves sinusoidalis think of Euler's complex number formula: eiθ=cosθ+i sinθ
  3. W

    What does RMS voltage signify?

    what is RMS voltage? Hi here is the relation between RMS and The Standard deviation Q as below: RMS=sqrt(sum(V(n)^2))/N), n=1~N Q=sqrt(sum((V(n)-u)^2/N), n=1~N when u=0, RMS=Q.
  4. W

    Which books are about the basics of mosfet ?

    Mosfet basic There is a free mosfet chapter on the Sedra website for download.
  5. W

    What is the concept of phase margin ?

    Re: phase margin zero meas no output even if you have input there: pole means there still has output even if the input is zero.
  6. W

    Looking for books and websites about RF IC test

    RF ic test Hi Can some one tell me some books( or website) about RF ic test?
  7. W

    roadmap form electronics newbie to expert

    It is no so easy to get this bible books in my country at all. Any way, I will try to seek them in future.
  8. W

    Introduce some electronics web site or forum

    Hi Could you please also give your answer in summary on why you take it?
  9. W

    roadmap form electronics newbie to expert

    Hi Many thanks. I will dip my life into this area. As the quick improvement of IC technology. Do you think it is still necessary to learn more about discreted circuit?
  10. W

    roadmap form electronics newbie to expert

    Hi Could any one of you showing your opinion on the roadmap from electronics newbie to expert
  11. W

    Introduce some electronics web site or forum

    Hi, Could some one of you introduce some famousc eletronics web site or forum for me, I am hopping your help?
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