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Digital Electronics

Q1:
The circuit in the given figure is
The min terms are ABC + ABC + AB C + ABC + ABC.The min terms are ABC + ABC + AB C + ABC + ABC.

A positive logic XOR gate

B negative logic OR gate

C negative logic AND gate

D positive logic AND gate

ANS:C - negative logic AND gate

Since V(I) is lower state than V(0) it is a negative logic circuit. Since diodes are in reversed parallel, it is an AND gate. Note: In Boolean algebra it is recognized that a positive logic OR is a negative logic AND. Similarly a positive logic AND is a negative logic OR.



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