1. Adder, Subtructer, Encoder, Decoder, Multiplexer, Demultiplexer
Al-MamoonUniversity College Computer Science Department Second Year
Architecture and Logic Gates
Logic Gates
Adder, Subtructer, Encoder, Decoder, Multiplexer, Demultiplexer
By Dr.Mazin Alzewary

2. Basic Logic Gates 1

6. Binary Decoder
Binary decoder is combinational logic circuit that use to decode the information from coded form into original form (example convert binary information into decimal form)

7. Binary Encoder
Binary encoder is combinational logic circuit that use to encode the information into coded form (example convert decimal information into binary form)
BCD to Binary Encoder

9. Questions
Q1) A 4 X1 multiplexer can be created by using a 2X4 decoder and minimum of five tri-state gates
Q2) Both encoder and multiplexer have 2 input lines and n output lines (for any n) Q3)

10. Q5) Using a 3-to-8 decoder, design a logic circuit to realize the following
Boolean function F(A,B,C) = Σm(2, 3, 5, 6, 7)
Q6) Using two 2-to-4 decoders, design a logic circuit to realize the following Boolean function F(A,B,C) = Σm(0, 1, 4, 6, 7)
Q7) Design a 16-to-1 multiplexer using 4-to-1 multiplexers only.

11. Q8)