2. Basic logic gates  AND gate:The truth table is given by A.BBA 000 010 001 111

3. Logic circuit

5. OR Gate logic circuit

6. Truth table of OR Gate OutputBA 000 110 101 111

7. NOT Gate(Invertor)

8. NAND Gate

9. The Truth table of NAND Gate OutputBA 100 110 101 011

10. NOR Gate Logic circuit

11. The truth table of NOR_gate (A+B)’BA 100 010 001 011

12. XOR Gate (Exclusive-OR)

13. The truth table of Exclusive- XOR Gate OutputBA 000 110 101 011

14. XNOR Gate logic circuit

15. The truth table of XNOR Gate OautputBA 100 010 001 111

17. Basic combinational logic circuits  The SOP expressions are implemented with AND gate for each product term.  The OR Gate for summing all the product  terms.  The SOP is called AND_OR logic

18. The AND-OR Logic (SOP)

19. Exlusive OR Gate logic circuit

20. NAND gate as universal logic gate

21. The truth table for 4-input AND-OR circuit OutputCDABDCBA 0000000 0001000 0000100 1101100 0000010 0001010 0000110 1101110 0000001 0001001 0000101 1101101 1010011

22. NOR Gate as universal logic element