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U17

Project 7: De Morgan’s Law

Negation of Conjunction

This circuit demonstrates De Morgan’s Law of

Negation of Conjunction which states that the

negation of a conjunction is equivalent to

disjunction of the negations. Turn the slide switch

(S1) on. The green wire on the left connects the A

inputs of the top U15 module and the U16 module

(representing the A input in the diagrams below)

while the green wire on the right connects the B

inputs of the second U15 module and the U16

module (representing the B input in the diagrams

below). Connect the loose ends of the red wire and

the black wire to either high voltage (1) or low

voltage (0). No matter what combination you

connect, the green LED and red LED will always

either both be on or both be off, demonstrating that

any combination of inputs to the two diagrams

always provides the same outputs.

Negation of Conjunction = Disjunction of Negations.

Same

U15

U16

U15

Negation

Conjunction

Disjunction

Negations

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Elenco Understanding Logic Gates and Circuits Manuale Utente Pagina 14