the nand gate as a universal gate logic function nand gate only aa a b a.ba.b a b a+b a b a b a b a...
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The NAND gate as a universal gate
Logic function NAND gate only
A A
AB A.B
AB
A+B
A
BA+B
AB
A + B
A + BAB
A A
AB A.B
B A+BA
A
BA+B
A
BA + B
A
B
A + B
Gates with more than two inputs
AB A.B.C=Y C
A
BYC
ABCD
YAB YCD
AB
A+B+C+D=YCD
AB
YCD
AB
YC
CBA
A+B+C=Y
EXAMPLE
Topdown design1 Block diagram2 Truth table3 Boolean function4 Simplify5 Schematic6 Test I/O Seq
EXCLUSIVE-OR & EXCLUSIVE-NOR CIRCIUTS
Design a logic circuit, using x1,x0,y1,y0 inputs, whose output will be HIGH only when the two binary numbers x1x0 and y1y0 are equal.
PARITY GENRATOR AND CHECKER
EX-OR gates used to implement parity generator and parity checker for even parity system.
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