Inside Collection (Course): Fundamentals of Electrical Engineering I
Summary: This module describes how to find the Thevenin and Norton equivalent circuits of an RLC circuit and sources.
When we have circuits with capacitors and/or inductors as well
as resistors and sources, Thévenin and MayerNorton
equivalent circuits can still be defined by using impedances and
complex amplitudes for voltage and currents. For any circuit
containing sources, resistors, capacitors, and inductors, the
inputoutput relation for the complex amplitudes of
the terminal voltage and current is
Equivalent Circuits  


Simple RC Circuit 

Let's find the Thévenin and MayerNorton equivalent circuits
for Figure 2. The opencircuit voltage and
shortcircuit current techniques still work, except we use
impedances and complex amplitudes. The opencircuit voltage
corresponds to the transfer function we have already
found. When we short the terminals, the capacitor no longer
has any effect on the circuit, and the shortcircuit current
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