RE-decoupling capcitors

  1. Anand Ranjith Mark
    Anand Ranjith Mark
    Hi all,
    In high speed PCB design how to choose decoupling capacitor value? is any formula is there for calculate it?
    how they choose Low value capacitors are used for high frequency and high value capacitors are used for low frequency ..?
    mostly all are using for decoupling capacitor values like 0.1uF and 0.01uF.how they select ??
    and the number of capacitors will depends on which one?
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