[SI-LIST] Power supply filtering

  • From: Bob Patel <whizplayer@xxxxxxxxx>
  • To: si_list <si-list@xxxxxxxxxxxxx>
  • Date: Thu, 1 Aug 2002 14:24:57 -0700 (PDT)

Hi! 
I had a question for filtering power to an analog
section from Digital VCC by using ferrite bead
approach.
The analog power is for a the circuit whose max.
switching freq. might not exceed 20MHz (E1
application). Also this ferrite bead has curent limit
to 300ma, now if the circuit draws more than 300ma ,
then the voltage will start dropping at the input of
the circuit. Hence cannot use ferrite beads. 
So, how do I filter the analog supply from the digital
supply?
Thanks
Bob

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