A three input majority gate is Defined by the logic function among ABC...
Understanding the Three Input Majority Gate
The three input majority gate is a digital logic gate that outputs true (1) if the majority of its inputs are true. The function defined by A, B, and C can be expressed as:
- F(A, B, C) = AB + BC + CA
This means the output is true when at least two of the inputs are true.
Majority Function Explained
The majority function M(A, B) represents the logical operation of two inputs A and B. When we consider the majority function with two inputs, we are essentially looking at the conditions under which the output will be true.
Relation to Majority Gate
For M(A, B), the output will be determined by the values of A and B alone, without considering a third variable C. Therefore, it can be expressed as:
- M(A, B) = A AND B
This means that the output of M(A, B) will only be true when both A and B are true.
Implications of M(A, B)
- If A = 0 and B = 0, then M(A, B) = 0
- If A = 0 and B = 1, then M(A, B) = 0
- If A = 1 and B = 0, then M(A, B) = 0
- If A = 1 and B = 1, then M(A, B) = 1
Conclusion
In conclusion, while the three input majority gate considers three inputs to determine its output, M(A, B) simplifies the logic to just the relationship between A and B, resulting in an 'AND' relationship for two inputs. This highlights the foundational role that basic logical operations play in constructing more complex logic functions.
To make sure you are not studying endlessly, EduRev has designed UPSC study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in UPSC.