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Crosstalk, EMI AND EMC

Discussion in 'Electronic Design' started by john, Jan 10, 2007.

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  1. john

    john Guest

    Hi,
    I have follwing questions

    1. What are the best ways to minimize crosstalk, EMI and EMC in
    digital and analog circuits from printed circuit board's view point?

    I read that the trace height above the ground planes paly very
    important role in minimizing
    crosstalk. The formula, crosstalk = k / (1+ (d/h)^2 ),
    where d is the distance between the conductors and h is the height
    above the ground plane. K is coefficient of coupling . What can I do to
    keep it thin? Any comments!


    3. What is the allowable or okay value of cross talk, EMI and EMC in
    circuits?

    4. How can I measure crosstalk , EMI and EMC ?

    5. I have a diffeerential amplifier with a CMRR of 90db, I need to
    increase the CMRR upto 120db. What would be the better solution?

    6. What is the method to calculate the rise time of the signal before
    designing the printed circuit board?

    7. How can I keep the inductance and impedance of solid plane ( power
    or ground) as minimum as possible? what specifications or data the
    manufacturer needs, if I want to design the planes with control
    impedance and inductance?

    Please advice!

    Thanks
    John
     
  2. Eeyore

    Eeyore Guest

    Where would you like to begin ?

    This isn't a quick answers question by a long long way.

    Graham
     
  3. john

    john Guest

    Please begin.
    John
     
  4. PeteS

    PeteS Guest

    To say nothing of the fact that engineers don't always agree on a lot
    of the 'answers' ;)

    Cheers

    PeteS
     
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