Transcript Source Transformation

Source Transformation
Convert a Voltage Source
in Series with a Resistance into
A Current Source
in Parallel with the SAME Resistance
And vice-versa
ECE 201 Circuit Theory I
1
Source transformation
• Convert the voltage
source in series with
R into an equivalent
current source in
parallel with the
SAME R!
• And vice-versa.
ECE 201 Circuit Theory I
2
How to make them equivalent
• Attach a load resistor (the same one) to
each circuit, and ensure that each circuit
delivers the same voltage and current to
the load.
ECE 201 Circuit Theory I
3
vs
i =
L R +R
load
R
i =
is
L R +R
load
ECE 201 Circuit Theory I
4
Equating the two currents
vs
R
i =
=
is
L R +R
R +R
load
load
vs
is =
R
v s = isR
ECE 201 Circuit Theory I
5