Magnitude Comparator and types of MC

Magnitude Comparator ppt..
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2. Combinational Logic Circuits
•Magnitude Comparator

3. Digital Comparator
Digital or Binary Comparators :
•
•
•

4. •
•
•
Magnitude Comparator
•
•
•

5. •
•
•For A<B A’B
•A>BAB’
•A=B A’B’+AB

6. Logic Circuit

7. 



8. 2-Bit Magnitude Comparator
•

9. A>B: A
1
B
1
’ + A
0
B
1
’B
0
’ + A
1
A
0
B
0
’ A=B: (A
0
Ex-Nor B
0
) (A
1
Ex-Nor B
1
)
A<B: A
1
’B
1
+ A
0
’B
1
B
0
+ A
1
’A
0
’B
0

10. Logic Circuit
Similarly try for 3 bit Magnitude Comparator..

11. 4-Bit Magnitude Comparator
•
•
3 2 1 0
32 10
3 3
3 3 2 2
3 3
3 3 2 2
3 3 2 2 1 1
3 3 2 2 1 1 0 0
•
33 3 322 3 3 2 2
11 3 3 2 2 1 100

12. •
3 2 1 0
32 10
3 3 2 2 1 1 0 0
•
3 3
3 3 20 2
3 3
3 3 20 2
3 32 2 1 1
3 32 21 1 0 0
•
33 3 322 3 3 2
11 3 3 2 2 1 100

13. (A
3
’B
3
+A
3
B
3
’)’ = A
3
’B
3
’+A
3
B
3
A
3
’B
3
A
3
B
3’
Logic Circuit

14. In Next Class
•Magnitude Comparators Eg.

15. •A

16. Magnitude Comparator