what if one filter is not enough for a circuit?

Discussion in 'General Electronics Chat' started by Mohit Singhal, Aug 12, 2016.

  1. Mohit Singhal

    Thread Starter New Member

    Aug 12, 2016
    3
    0
    what is required to fulfill the needs if one filter is not enough for the emissions for high range?
     
  2. AlbertHall

    Well-Known Member

    Jun 4, 2014
    1,956
    387
    Multiple filters, multiple pole filter(s).
    For instance, a power supply rail may have a large(ish) electrolytic capacitor to smooth out slow changes in the supply voltage. The performance of electrolytic capacitors degrades quite quickly as the frequency increases so then there is a lower value (perhaps) ceramic capacitor to filter the higher frequencies.
     
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