Download presentation
Presentation is loading. Please wait.
1
Combinational Logic Circuits Chapter 2 Mano and Kime
2
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
3
Digital Logic Gates *
4
Gates with More than Two Inputs
5
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
6
Basic Identities of Boolean Algebra
7
Implementation of Boolean Function with Gates
8
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
9
Minterms for Three Variables
10
Sum of Products Design X Y minterms 0 0 m0 = !X & !Y 0 1 m1 = !X & Y 1 0 m2 = X & !Y 1 1 m3 = X & Y
11
Sum of Products Design X Y Z 0 0 0 0 1 1 1 0 1 1 1 0 Design an XOR gate m1 = !X & Y m2 = X & !Y Z = m1 # m2 = (!X & Y) # (X & !Y)
12
Sum of Products: Exclusive-OR !X & Y X & !Y Z = (!X & Y) # (X & !Y)
13
Maxterms for Three Variables
14
Product of Sums Design Maxterms: A maxterm is NOT a minterm maxterm M0 = NOT minterm m0 M0 = !m0 = !(!X & !Y) = !!(!!X # !!Y) = X # Y
15
Product of Sums Design X Y minterms maxterms 0 0 m0 = !X & !Y M0 = !m0 = X # Y 0 1 m1 = !X & Y M1 = !m1 = X # !Y 1 0 m2 = X & !Y M2 = !m2 = !X # Y 1 1 m3 = X & Y M3 = !m3 = !X # !Y
16
Product of Sums Design X Y Z 0 0 0 0 1 1 1 0 1 1 1 0 Design an XOR gate Z is NOT minterm m0 AND it is NOT minterm m3
17
Product of Sums Design X Y Z 0 0 0 0 1 1 1 0 1 1 1 0 Design an XOR gate M0 = X # Y M3 = !X # !Y Z = M0 & M3 = (X # Y) & (!X # !Y)
18
Product of Sums: Exclusive-OR
19
Three- Level and Two- Level Implementation
20
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
21
Two-Variable Map
22
Three-Variable Map
23
Three- Variable Map: Flat and on a Cylinder to Show Adjacent Squares
24
Three-variable K-Maps X YZ 00011110 0 1 11 11 F = !X & !Y # X & Z
25
Three-variable K-Maps X YZ 00011110 0 1 11 11 F = !X & !Y & !Z # !X & !Y & Z # X & !Y & Z # X & Y & Z F = !X & !Y & (!Z # Z) # X & Z & (!Y # Y) = !X & !Y # X & Z
26
Three-variable K-Maps X YZ 00011110 0 1 1 1 11 F = Y & !Z # X 1
27
Three-variable K-Maps X YZ 00011110 0 1 11 111 1 F = !X & !Y # X & y # Z
28
Three-variable K-Maps X YZ 00011110 0 1 11 11 F = X & Z # !X & !Z
29
Three-variable K-Maps X YZ 00011110 0 1 11 11 1 1 F = Y # !Z
30
Three-variable K-Maps X YZ 00011110 0 1 0123 4567 11 11 F = m0 # m2 # m5 # m7 = (0,2,5,7)
31
Four-Variable Map
32
Four-Variable Map: Flat and on a Torus to Show Adjacencies
33
Four-variable K-Maps WX YZ 00011110 00 01 11 10
34
Four-variable K-Maps WX YZ 00011110 00 01 11 10 0123 4567 89 11 12131415 F(W,X,Y,Z) = (2,4,5,6,7,9,13,14,15)
35
Four-variable K-Maps 111 1 1 WX YZ 00011110 00 01 11 10 111 1 F = !W & X # X & Y # !W & Y & !Z # W & !Y & Z
36
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
37
Prime Implicants F = X & !Y & Z # !X & !Z # !X & Y Each product term is an implicant A product term that cannot have any of its variables removed and still imply the logic function is called a prime implicant.
38
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
39
Digital Logic Gates >
40
>
41
Logical Operations with NAND Gates
42
Alternative Graphics Symbols for NAND and NOT Gates
43
Logical Operations with NOR Gates
44
Two Graphic Symbols for NOR Gate
45
Demonstration of Positive and Negative Logic
46
Generalized De Morgan’s Theorem NOT all variables Change & to # and # to & NOT the result -------------------------------------------- F = X & Y # X & Z # Y & Z F = !((!X # !Y) & (!X # !Z) & (!Y # !Z)) F = !(!(X & Y) & !(X & Z) & !(Y & Z))
48
NAND Gate
49
X Y X Z Y Z F F = X & Y # X & Z # Y & Z
50
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
51
Exclusive-OR Gate XOR X Y Z Z = X $ Y X Y Z 0 0 0 0 1 1 1 0 1 1 1 0 X $ 0 = X X $ 1 = !X X $ X = 0 X $ !X = 1 X $ !Y = !(X $ Y) !X $ Y = !(X $ Y) A $ B = B $ A (A $ B) $ C = A $ (B $ C) = A $ B $ C
52
Exclusive-OR Constructed with NAND gates X & (!X # !Y) # Y & (!X # !Y) = X & !X # X & !Y # Y & !X # Y & !Y = X & !Y # Y & !X = X & !Y # !X & Y = X $ Y
53
Odd Function X $ Y $ Z = (X & !Y # !X & Y) & !Z # (X & Y # !X & !Y) & Z = X & !Y & !Z # !X & Y & !Z # !X & !Y & Z # X & Y & Z
54
Odd Function
55
Parity Generation and Checking
56
Combinational Logic Circuits Binary Logic and Gates Boolean Algebra Standard Forms Map Simplification Map Manipulation NAND and NOR Gates Exclusive-OR Gates Integrated Circuits
57
Fully Complementary CMOS Gate Structure and Examples
58
F = A + B*C
59
Transmission Gate (TG)
60
Selector and Exclusive- OR Constructed with Transmission Gates
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.