# Digital Electronics - Combinational Logic Circuits - Discussion

### Discussion :: Combinational Logic Circuits - General Questions (Q.No.26)

26.

The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?

 [A]. A > B = 1, A < B = 0, A < B = 1 [B]. A > B = 0, A < B = 1, A = B = 0 [C]. A > B = 1, A < B = 0, A = B = 0 [D]. A > B = 0, A < B = 1, A = B = 1

Explanation:

No answer description available for this question.

 Xyz said: (May 3, 2011) Please someone explain this logic.

 Selva said: (Dec 3, 2011) I can't understand the logic in a given options. Please any one explain me the logic.

 Adarsha.Barkua said: (Feb 18, 2012) A=1100 AND B=1001 SO both having equal number of one's and zero's but the value is differs. A is greater compare to B but it's having equal no of one's (A>B=1) same holes good for next statement but considering zero's A value is smaller compare to B but its having equal number of zero's (A

 Sudeep said: (May 21, 2012) As far I am thinking its a comparator which compares two numbers. A is 1100 (12) , B is 1001 (9). A>B (TRUE so 1) , A

 Chandan said: (Aug 31, 2012) Yes, sudeep give correct explanation.

 Sanjiya said: (Apr 1, 2013) A = 1100,(12). B = 1001,(9). 1 is represent true. 0 is represent false. So, A>B=1, A

 Judepraveen said: (Dec 16, 2014) What is the correct answer?

 Manowar said: (Aug 7, 2016) You are right @Sudeep.

 Divya Chaudhary said: (Nov 4, 2016) The logic behind the ansswer is: There can be three cases : number A is greater than number B,or less than B or equal to B. i.e. case1:AB case3:A=B Now,in question A=1100 whose decimal equivalent is 12 and B=1001 whose binary equivalent is 9. So case1 is true, and we are using 1 for true and 0 for false.so combining three cases to giveanswer we get, A > B = 1,A < B = 0, A = B = 0.

 Vanitha said: (May 27, 2017) Thanks for your explanation @Sanjiya.

 Sachin said: (Aug 17, 2017) You give a simple explanation easy to understand. Thanks @Sudeep.

 Shaik said: (Sep 21, 2017) You are right, thanks for the explanation @Sudeep.

 Manogna said: (Feb 20, 2018) I am not getting the solution. Anyone help me to get it.

 Vishaka said: (Feb 21, 2018) It's a bitwise comparison so A=B=1 , A>B=1,AB, 3rd-row A=B, 4th-row A=B. E is equal, G is greater.

 Kanmani said: (May 2, 2019) Thanks @Sudeep.