1

EEE 441 LOGICAL DESIGN IILABORATORY

EXPERIMENT#3

COMBINATIONAL CIRCUIT DESIGN I

PRELIMINARY WORK

Mehmet BAYRAM 9610433

2

I. Object

In this experiment yo will design, cpnsturact and test various combinational circuits.

II. Preliminary Work

1. a) b)

Y X

' 'Y A B C D= + + + ' 'X AB C D=

A B C D X Y 0 0 0 0 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 1 1 0 1 0 1 0 0 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 1 1 0 1 1 0 0 0 0 1 1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 1 0 1 1 1 0 0 0 1 1 1 0 1 0 1 1 1 1 0 0 1 1 1 1 1 0 1

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

1

3

c)

d)

2.

X AB AC AD BCD= + + +

%45 %30 %15 %10 A B C D X 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0 0 1 1 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 1 1 1 0 1 0 1 1 0 1 1 1 1 1 0 0 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1

1 1 1 1 1 1 1 1

4

With NAND Gates

With NOR Gates

3.

' ' 'X A B C= +

A B C D X 0 0 0 0 1 0 0 0 1 1 0 0 1 0 1 0 0 1 1 1 0 1 0 0 1 0 1 0 1 1 0 1 1 0 1 0 1 1 1 1 1 0 0 0 1 1 0 0 1 0 1 0 1 0 0 1 0 1 1 0 1 1 0 0 0 1 1 0 1 0 1 1 1 0 0 1 1 1 1 0

1 1 1 1 1 1 1 1 1 1