1. Exclusive OR Gate

2. Logically, the exclusive OR (XOR) operation can be seen as either of the following operations:exclusive OR (XOR) 1. A AND NOT B OR B AND NOT A 2. A OR B AND NOT A AND B which can be implemented by the gate arrangements shown. They can also be implemented using NAND gates only.NAND

3. Exclusive OR Gate

4. Exclusive OR using NAND

5. IC 7486 Exclusive-OR IC 7486

6. Exclusive OR Timing Diagram

7. Exclusive NOR http://www.wisc- online.com/objects/index_tj.asp?objid=DI G502

8. THE EXCLUSIVE NOR GATE Symbol & Truth Table

9. Exclusive NOR

10. Examples 4-16 Two numbers each of two bits; i.e. x,x, and y, y. Design a logic to give High output whenever both two-bit numbers are equal.

11. Example 4-17 Simplify the circuit suing Ex-OR & Ex-NOR

12. Parity Generator 4 Inputs & 5 Outputs

13. Even Parity Checker 5 Inputs & One Output

14. Enable & Disable Enable Logic A 1 A 1 A 0 A 0

15. Enable & Disable Disable Logic A 0 A 0 A 1 A 1

16. Example 4-21 Design a logic circuit that will allow a signal to pass an output only when control inputs B and C both are high.