
Principles of Analog Electronics
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7.3.3 LC Filter
The LC circuit, made of the series of an inductor and a capacitor, is an ideal
network, because it does not consider the unavoidable energy dissipation due to
resistance. The resistors are usually present in any network, because their func-
tion is to limit or control the amount of owing current. Even when no resistor is
utilized, the resistance of the network is provided in any event by the resistance of
wires and by the physical soldering between components (both usually ignored),
even possible corrosion around terminal points, or faulty insulations, etc. In any
case, just for didactic pur ...