# logic design

Discussion in 'Homework Help' started by cidmemike, Aug 17, 2010.

1. ### cidmemike Thread Starter New Member

Aug 17, 2010
3
0
good day guys,
I have a home work to submit tommorow but do not know how tto go about it. a help will be highly appreciated. here are the problems

1. A1 and A0 are rpresents a two input binary number P, another two input binary number Q is represented by B1 and B0. design a loogic comparator using A1,A0 and B1,B0 as inputs whose output will be high only when the two numbers P and Q are equal. simplify and draw th elogic gate.

2. simplify the boolean expression F='x'y +'X'Z +YZ +XZ and drwa the logic gate. thanks for your anticipated help

2. ### cidmemike Thread Starter New Member

Aug 17, 2010
3
0
pls I would appreciate an durgent reply to the title "logic design" thanks

Apr 5, 2008
18,899
3,718
Hello,

So what have you done upto now?

Here are some pages of the EDUCYPEDIA on digital subjects:

General overview digital logic
Arithmetic circuits D/A-A/D converters Number systems Codes and decoders Flip flops Technology Counters and registers General overview Technology-CMOS Digital logic Memories Technology-TTL Timers and oscillators
Bertus

4. ### cidmemike Thread Starter New Member

Aug 17, 2010
3
0
well, the question is to "design a logic comparative" i have tried using 2 NOT gates, 2 AND gates and an 1 OR gates but the problem is that I do not know if it is the RIGHT comparator to use.
On the second Question, I have tried factoring as in F='X('Y +'Z) + Z(y+x) but how the logic gate wil look like is the problem. thanks

5. ### sify87 New Member

Jun 23, 2010
9
0
Ok!See the attachment. Here I can use two EX-NOR gate & one AND gate.If the nos P and Q are same then their bits(A0 & B0, A1 & B1) should also be same.So,the o/p of EX-NOR gate will be 1 only when they are equal.If both the EX-NOR o/p is 1 then the o/p of AND gate is 1 .Thanks!!

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