Slide 1: Introduction to Logic Gates AND Gate It is an electronic circuit, which generates an output signal of 1 if and only if all input signals are also 1 An AND gate is the physical realization of the logical multiplication ( AND operation ) A B Input i 0 / 1 0 1 Suppose Input is 1 OUTPUT Suppose Input is 0
Slide 2: B A Block Diagram of AND Gate Output 1 . 1 = 1 d A B i 0 / 1 OUTPUT INPUT OUTPUT 1 1 1 1 0 0 0 1 0 0 0 0 1
Slide 3: B A Block Diagram of AND Gate Output 1 . 0 = 0 0 A B i 0 / 1 OUTPUT INPUT OUTPUT 1 1 1 1 0 0 0 1 0 0 0 0
Slide 4: B A Block Diagram of AND Gate Output 0 . 1 = 0 0 A B i 0 / 1 OUTPUT INPUT OUTPUT 1 1 1 1 0 0 0 1 0 0 0 0
Slide 5: B A Block Diagram of AND Gate Output 0 . 0 = 0 0 A B i 0 / 1 OUTPUT INPUT OUTPUT 1 1 1 1 0 0 0 1 0 0 0 0
Slide 6: 1 A i B OUTPUT OR Gate It is an electronic circuit, which generates an output signal of 1, if any of the output signals is 1 It is the physical realization of logical OR 0 / 1 1 1
Slide 7: Block Diagram of OR Gate gg A i B OUTPUT 0 / 1 A B 1 + 1 = 1 INPUT OUTPUT 1 1 1 1 0 1 0 1 1 0 0 0 1
Slide 8: Block Diagram of OR Gate gg A i B OUTPUT 0 / 1 A B 1 + 0 = 1 INPUT OUTPUT 1 1 1 1 0 1 0 1 1 0 0 0 1
Slide 9: Block Diagram of OR Gate gg A i B OUTPUT 0 / 1 A B 0 + 1 = 1 INPUT OUTPUT 1 1 1 1 0 1 0 1 1 0 0 0 1
Slide 10: Block Diagram of OR Gate gg A i B OUTPUT 0 / 1 A B 0 + 0 = 0 INPUT OUTPUT 1 1 1 1 0 1 0 1 1 0 0 0 1
Slide 11: NOT Gate It is an electronic circuit- that generates an output signal, which is reverse of input signal It is the physical realization of complementation operation Not Gate is also called inverter because it inverts the input. Output 1 0 A INPUT OUTPUT 0 1 1 0
Slide 12: NOT Gate 0 1 A INPUT OUTPUT 0 1 1 0 Ā
Slide 13: NAND Gate N ot AND Gate - NOT + AND gate It is a combination of NOT and AND gates It is Complemented AND Gate A B A.B Output INPUT OUTPUT 1 1 0 1 0 1 0 1 1 0 0 1 Symbol of NAND gate Truth Table + = = A ↑ B Equation of NAND Gate
Slide 14: NAND Gate N ot AND Gate - NOT + AND gate It is a combination of NOT and AND gates It is Complemented AND Gate A B A.B Output INPUT OUTPUT 1 1 0 1 0 1 0 1 1 0 0 1 Symbol of NAND gate Truth Table + = = A ↑ B Equation of NAND Gate
Slide 15: NAND Gate N ot AND Gate - NOT + AND gate It is a combination of NOT and AND gates It is Complemented AND Gate A B A.B Output INPUT OUTPUT 1 1 0 1 0 1 0 1 1 0 0 1 Symbol of NAND gate Truth Table + = = A ↑ B Equation of NAND Gate
Slide 16: NAND Gate N ot AND Gate - NOT + AND gate It is a combination of NOT and AND gates It is Complemented AND Gate A B A.B Output INPUT OUTPUT 1 1 0 1 0 1 0 1 1 0 0 1 Symbol of NAND gate Truth Table + = = A ↑ B Equation of NAND Gate
Slide 17: NOR Gate NOT – OR Gate NOT Gate + OR Gate It is complement OR gate Symbol of NOR Gate A B INPUT OUTPUT 1 1 0 1 0 0 0 1 0 0 0 1 Truth Table . = = A ↑ B Equation of NOR Gate A B A + B 1 + 1 = 0 Output Output
Slide 18: NOR Gate NOT – OR Gate NOT Gate + OR Gate It is complement OR gate Symbol of NOR Gate A B INPUT OUTPUT 1 1 0 1 0 0 0 1 0 0 0 1 Truth Table . = = A ↑ B Equation of NOR Gate A B A + B 1 + 0 = 0 Output Output
Slide 19: NOR Gate NOT – OR Gate NOT Gate + OR Gate It is complement OR gate Symbol of NOR Gate A B INPUT OUTPUT 1 1 0 1 0 0 0 1 0 0 0 1 Truth Table . = = A ↑ B Equation of NOR Gate A B A + B 0 + 1 = 0 Output Output
Slide 20: NOR Gate NOT – OR Gate NOT Gate + OR Gate It is complement OR gate Symbol of NOR Gate A B INPUT OUTPUT 1 1 0 1 0 0 0 1 0 0 0 1 Truth Table . = = A ↑ B Equation of NOR Gate A B A + B 0 + 0 = 1 Output Output