Hi

1. INTRODUCTION
A large
complex circuits
Simplify
circuit analysis
Circuit Theorems
‧Thevenin’s theorem ‧ Norton theorem
‧Circuit linearity ‧ Superposition
‧source transformation ‧ max. power transfer

2. Source Transformation
 A source transformation is the process of
replacing a voltage source vs in series with a
resistor R by a current source is in parallel
with a resistor R, or vice versa

3. Source Transformation
R
v
i
R
i
v s
s
s
s 
 or

4. Source Transformation
s
s
s I
R
V 
s
s
s
R
V
I 

5. Source Transformation
 Equivalent sources can be used to simplify
the analysis of some circuits.
 A voltage source in series with a resistor is
transformed into a current source in parallel
with a resistor.
 A current source in parallel with a resistor is
transformed into a voltage source in series
with a resistor.

6. Example
 Use source transformation to find vo in the
circuit.

7. Example

8. Example
we use current division to get
and
A
4
.
0
)
2
(
8
2
2



i
V
2
.
3
)
4
.
0
(
8
8 

 i
vo