15
4.5
Thevenin’s Theorem (1)
It states that a linear
two-terminal circuit (Fig. a) can be replaced by an equivalent circuit (Fig. b)
consisting of
a
voltage source VTH in series with a resistor RTH,
where
•VTH is the
open-circuit voltage at the terminals.
•RTH is the input or
equivalent resistance at the terminals when the independent sources are turned off.