Digital Electronics - Combinational Logic Circuits - Discussion
Discussion Forum : Combinational Logic Circuits - General Questions (Q.No. 19)
19.
Which gate is best used as a basic comparator?
Discussion:
7 comments Page 1 of 1.
Sjerve said:
2 years ago
The logical operator results truly when either of the operands is true (one is true and the other one is false) but both are not true and both are not false.
KIRAN V said:
5 years ago
XNOR gate.
Comparators are used in central processing unit s (CPU's) and micro-controllers (MCUs). Examples of digital comparator include the CMOS 4063 and 4585 and the TTL 7485 and 74682.
Note: An XNOR gate is a basic comparator because its output is "1" only if its two input bits are equal.
Comparators are used in central processing unit s (CPU's) and micro-controllers (MCUs). Examples of digital comparator include the CMOS 4063 and 4585 and the TTL 7485 and 74682.
Note: An XNOR gate is a basic comparator because its output is "1" only if its two input bits are equal.
Purushotham said:
9 years ago
According to truth table from equal condition if both the inputs are equal than it can produce logic 1 output, so the EX-NOR gate is best for the comparator.
Neeraj pal said:
9 years ago
comparator means simple as difference. We take an example when both no. Are same (a=10, b=10) then compare both no. Then (10-10) = 0. So if both no. Are same then give it 0. So from the table of ex-or, it is clear.
Sanjeev papnoi said:
1 decade ago
According to the equation and truth table it is clear that if there is same input then output is low. When it is different then then output is high (1). So here 1st input is to be compared with 2nd one. And then the final result we got.
Sachin tyagi said:
1 decade ago
Truth table
A B y
0 0 0
0 1 1
1 0 1
1 1 0
When both the input are same then the output is low & when the two inputs are differ then the output is high that mens the Ex-or gate compair both the inputs & then gives the output.
A B y
0 0 0
0 1 1
1 0 1
1 1 0
When both the input are same then the output is low & when the two inputs are differ then the output is high that mens the Ex-or gate compair both the inputs & then gives the output.
Princy said:
1 decade ago
If both the inputs are same it'll fetch 1 otherwise 0.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers