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EMI/EMC

KARPCB
Dear Friends what are the main reason to occur EMI/EMC problems in pcb layout? how to identifiy that problems(EMI) i have been using allegro 16.3? how to reduce emi in pcb layout?
  • KoolKat

    Here is something for you to reference.

    http://www.cvel.clemson.edu/emc/FAQ/question-pcbdes01.html

    And, of course, if you do an internet search on "emi and emc in printed circuit boards" you will get many good references.

  • Mike Veal

    EMI and SI go hand in hand. High speed nets will radiate when the return current in the power plane and the signal current in the net form a loop. The greater the di/dt, the smaller the loop needs to be to stop radiation. Rapid changes in impedance such as 90 degree corners in high speed nets can also bleed radiation.

    I thoroughly recommend attending Howard Johnson's course, Signal Integrity, Black magic. No connection other than a happy attendee.

  • KARPCB
    thanks for your information i dont know about howard johnsons course, please guide me.
  • Mike Veal

     This fella :

    http://www.signalintegrity.com/

    The seminar I was referring to was high speed digital design - an intro to black magic. The book is good as a reference manual, but  a little dry to read on its own.

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