LOGIC Circuits

Logic Circuits

Basic gates – IEEE standards

Derived gates: XOR, NAND, NOR, NXOR

Example 1

Example 2

Example 3. NAND is a universal gate -it can be used to produce all the other gates

Combinational circuits

Examples of useful combinational circuits

Example 4

Example 5. Full Adder

Example 5. Full Adder (contd.)

Example 5. Full Adder (contd.)

Example 6. n - bit parallel adder

Example 6. n - bit parallel adder (contd.)

Example 7. Full Subtractor

Example 7. Full Subtractor (contd.)

Example 7. Full Subtractor (contd.)

Example 8. n - bit parallel subtractor

Example 8. n - bit parallel subtractor (contd.)

Example 9. Encoder

Example 9. Encoder (contd.)

Example 10. Decoder

Example 10. Decoder (contd.)

Example 11. 7 segments Circuit

Example 11. 7 segments Circuit

Example 11. 7 segments Circuit (contd.)

Binary codes

Binary codes (contd.)

Example 12.