Digital Electronics - Boolean Algebra and Logic Simplification - Discussion
Discussion Forum : Boolean Algebra and Logic Simplification - General Questions (Q.No. 11)
11.
An AND gate with schematic "bubbles" on its inputs performs the same function as a(n)________ gate.
Discussion:
12 comments Page 2 of 2.
Neethu said:
1 decade ago
Bubbled input makes A = A' and B = B'.
Normally output of AND gate is A.B.
In bubbled input case (A'.B')' = (A+B)'.
i.e NOR GATE.
Normally output of AND gate is A.B.
In bubbled input case (A'.B')' = (A+B)'.
i.e NOR GATE.
Jigar said:
1 decade ago
Bubble performs the inversion function so consider
A=1,B=0 ->A*B=0
NOW LOGI OUTPUT WITH BUBBL:
A=0,B=1-> A*B=0.............................(1)
CONSIDER SAME VALUES FOR NOR GATE:
FIRST ORED OUT PUT:
A+B=0+1=1
NOW NORED OUTPUT:
NOR OF A+B=0.................................(2)
FROM (1) AND (2) AN GATE WITH BUBBLE INPUT =NOR GATE.
A=1,B=0 ->A*B=0
NOW LOGI OUTPUT WITH BUBBL:
A=0,B=1-> A*B=0.............................(1)
CONSIDER SAME VALUES FOR NOR GATE:
FIRST ORED OUT PUT:
A+B=0+1=1
NOW NORED OUTPUT:
NOR OF A+B=0.................................(2)
FROM (1) AND (2) AN GATE WITH BUBBLE INPUT =NOR GATE.
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