circuits

1. ELECTRONICS I
spring 2020
Lec. 6
Dr. Mona M.Soliman
IT Dept.

2. 2
MESH ANALYSIS
(“Mesh-Current Method”)
1) Select M (independent) mesh currents such that at least
one mesh current passes through each branch
M = #branches - #nodes + 1
2) Apply KVL to each mesh,
expressing voltages in terms of
mesh currents
=> M equations for
M unknown mesh currents
3) Solve for mesh currents
=> determine node voltages
Formal Circuit Analysis Methods

3. 3
Mesh Analysis
 M independent
currents
 KVL

4. 4
Mesh Analysis
 M independent currents
 KVL

5. 5

6. 6

7. 7
Mesh Analysis
And Dependent Sources
 M independent currents
 KVL

8. 8

9. 9
Mesh Analysis
Special Cases
 M independent currents
 KVL

10. 10

11. 11
Mesh Analysis
And Dependent Sources
 M independent currents
 KVL
1 1 3
2 1
3 2 4 3 3 1
4
1:6 8( ) 50 0
2: 3
3:2( ) 4( ) 8( ) 0
4: 5
mesh I I I
mesh I i
mesh I I I I I I
mesh I A
   
 
     
 

12. 12

13. 13
Mesh Analysis
Special Cases
 M independent currents
 KVL

14. 14
First Solution :
Use source transformation to
avoid common current source

15. 15
Second Solution :
Use supermesh
1 1 3
2 3 1
2 3
4 5( ) 75 0
6 13 5( ) 0
13
I I I
I I I
I I
   
   
 