330 likes | 534 Views
Lecture No. 14. Combinational Functional Devices. Digital Logic &Design Vishal Jethva Lecture 14 svbitec.wordpress.com. Recap. Odd-Prime Number Detector Circuit Using Quine-McCluskey Method Combinational Logic Implemented in SOP and POS form Design and Implementation Steps
E N D
Lecture No. 14 Combinational Functional Devices svbitec.wordpress.com
Digital Logic &Design Vishal Jethva Lecture 14 svbitec.wordpress.com svbitec.wordpress.com
Recap • Odd-Prime Number Detector Circuit • Using Quine-McCluskey Method • Combinational Logic • Implemented in SOP and POS form • Design and Implementation Steps • Timing Diagram • Active High/Low inputs/outputs svbitec.wordpress.com
Odd-Parity Function svbitec.wordpress.com
SOP Expression SImplification svbitec.wordpress.com
Simplifying Expression svbitec.wordpress.com
Odd-Parity Generator Circuit svbitec.wordpress.com
Operation of Odd-Parity circuit svbitec.wordpress.com
XOR & XNOR Gates • XOR function • XNOR function svbitec.wordpress.com
XOR Gate svbitec.wordpress.com
XNOR Gate svbitec.wordpress.com
Combinational Functional Devices • Comparators • BCD to 7-Segment • Parity Generator Circuit svbitec.wordpress.com
Half & Full Adders • Half Adder • Full Adder svbitec.wordpress.com
Half & Full Adders svbitec.wordpress.com
Half-Adder • Function Table • Expression • Logic Circuit svbitec.wordpress.com
Half-Adder Function Table svbitec.wordpress.com
Half-Adder Circuit svbitec.wordpress.com
Full-Adder • Function Table • Expression • Logic Circuit svbitec.wordpress.com
Full-Adder Function Table svbitec.wordpress.com
Sum Expression svbitec.wordpress.com
Carry Out Expression svbitec.wordpress.com
Full-Adder Circuit svbitec.wordpress.com
Full-Adder • Full-Adder = Half-Adder + Half-Adder svbitec.wordpress.com
Full-Adder based on Two Half-Adders svbitec.wordpress.com
Parallel Binary Adder • Multiple Single bit Full-Adder connected in Parallel svbitec.wordpress.com
4-bit Parallel Adder svbitec.wordpress.com
Carry Propagation • Carry Ripple • Look-Ahead Carry Circuits svbitec.wordpress.com
Look-Ahead Carry Circuit svbitec.wordpress.com
Sum & Carry Expressions svbitec.wordpress.com
Carry Expressions svbitec.wordpress.com
Look-Ahead Carry Generator svbitec.wordpress.com
MSI-Adders • 74LS83A • 74LS283 • 16-pin ICs • 4-bit A input • 4-bit B input • 4-bit Sum output • 1-bit Carry in • 1-bit Carry Out svbitec.wordpress.com
12-bit Parallel Adder svbitec.wordpress.com