MESSAGE
| DATE | 2014-12-13 |
| FROM | Ruben Safir
|
| SUBJECT | Subject: [LIU Comp Sci] old homework question
|
From owner-learn-outgoing-at-mrbrklyn.com Sat Dec 13 17:19:36 2014
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From: Ruben Safir
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Subject: [LIU Comp Sci] old homework question
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You had this question that I had to research:
Logic Gates
We wish to synthesize a 2 to 4 decoder with active outputs low.
What is active inputs low?
Decoder Theory compliments of
http://coep.vlab.co.in/?sub=28&brch=81&sim=609&cnt=1
Ready now to answer:
1. Establishing the truth table of the circuit.
A
B
Q0
Q1
Q2
0
0
0
0
0
0
1
0
0
1
1
0
0
1
0
1
1
1
0
0
***** 2. Determine output functions Y= f(A,B) A and B are the i
I really do not understand this question but I think the answer is:
f(Ai ,Bi) = (A*B)'
Generalized
f(A,B) = (A'*B')' Union (A'*B)' Union (A*B')' Union (A*B)'
where A=B (A=i) (B=i)
f(A,B) = A'*A'
f(A,B) = A
??
*************
I need to talk about this and find further research.
See that last line was that I don't understand the last part of this
question and I STILL don't understand it and it is related to the second
review question.
I don't GET ... what the hell is it talking about.
Determine output functions Y= f(A,B) A and B are the i
what is an output function?
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