vcc filtering

from The Free On-line Dictionary of Computing (8 July 2008)
VCC filtering

   <electronics> A technique for reducing the amount of {Radio
   Frequency Interference} spread via power supply connections.
   {VCC} is a common name for the non-{ground} power supply line
   in circuits based on {bipolar transistors}.

   When part of a circuit generates lots of radio-frequency
   noise, that portion of the {power plane} can be isolated from
   the rest of the circuit and power delivered to it via a {low
   pass filter}, usually a {PI filter}, as shown in the diagram
   below.

         source   ________inductor_________   load
   		  |                |
   	      capacitor        capacitor
   		  |                |
   	       ground           ground

   This helps to shield the rest of the circuit from the noise
   generated by the load.

   (1998-01-26)