Synchronous Counter

4 to 1 line Multiplexer

D FLIP FLOP

4 bit shifter

Full Adder

Asynchronous Counter

2:4 DECODER CIRCUIT

AND

OR

X-NOR USING NAND

NOT

NOR

OR USING NAND

NOT USING NOR

OR USING NOR

AND USING NAND

NOR USING NAND

NAND USING NOR

X-NOR USING NOR

or with nand

NAND

XNOR

half adder

F(x,y,z) = ∑ (3,4,6,7)

COMPARATOR

XOR

SR flip-flop

XOR USING NAND

COMPARATOR

NOT USING NAND

2-4 Line Decoder

Full Adder.

XOR USING NOR

F(w,x,y,z) = ∑(0,1,2,4,5,6,8,9,12,13,14)

Counter

Half subtractor

2-4 Line Decoder.

Full subtractor