CEN/CENELEC: The Comite pour Europeende
Normalisation Electronic (European Committee
for Electrotechnical Standardization) is a technical
committee that recommends standards to
be adopted by the European Community (EC).
Standards cover EMI/RFI interference, intrinsic
product safety, immunity, etc.
Common: A conductive path used as a return for
two or more circuits. When connected to earth, a
common is the same as ground. See Ground.
Common Mode Filter: An input line filter that
include a differential wound transformer often used
within power supplies (see Figure 6). Sometimes
called Balun filters, they show a high impedance
to common mode signals and a low impedance to
differential mode signals.