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x D<br />

= ( x<br />

x + x = x x + x<br />

14<br />

x15<br />

+ x14x16<br />

+ x15x16)<br />

x E<br />

= x<br />

+<br />

17<br />

24<br />

18x19<br />

x20<br />

+ x25<br />

= x30<br />

x20<br />

x25<br />

x F<br />

= x<br />

+<br />

21x22<br />

x23<br />

+ x24<br />

+ x25<br />

= x31<br />

x23<br />

+ x24<br />

x25<br />

x<br />

26<br />

= x1x2<br />

+ x1x3<br />

+ x2x<br />

x<br />

27<br />

= x5<br />

+ x6<br />

+ x7<br />

x8<br />

x<br />

28<br />

= x10<br />

x11<br />

+ x10<br />

x12<br />

+ x11x12<br />

where<br />

3<br />

29<br />

17<br />

24<br />

Because of<br />

df ( X )<br />

= ( x<br />

dx<br />

28<br />

x = + +<br />

29<br />

x14<br />

x15<br />

x14<br />

x16<br />

x15x16<br />

x<br />

30<br />

= x18x19<br />

x<br />

31<br />

= x21x22<br />

28<br />

x<br />

13<br />

+ x<br />

24<br />

) ⊕ ( x<br />

28<br />

x<br />

13<br />

+ x<br />

24<br />

) = x<br />

13<br />

x<br />

24<br />

Fig.1<br />

Main logic diagram of combination logic unit<br />

Fig.2 Basic logic unit in fig.1<br />

118

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