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.

Last updated: 1998-01-26

Nearby terms:

vbell ♦ VBScript ♦ vbx ♦ vc ♦ VCC filtering ♦ VCD ♦ VCID ♦ VCL ♦ VCODE ♦ VCPI

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