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
    what is required to fulfill the needs if one filter is not enough for the emissions for high range?
  2. AlbertHall

    Distinguished Member

    Jun 4, 2014
    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.