7485 magnitude comparator outputs for A = 1001 and B = 1010 For a 7485-style 4-bit magnitude comparator, determine the outputs A<B, A=B, and A>B when inputs are A = 1001 (decimal 9) and B = 1010 (decimal 10).

Introduction / Context:
Magnitude comparators output three mutually exclusive flags indicating less-than, equal, or greater-than relationships between binary words. Practicing with specific inputs develops fluency useful for timing and control logic.

Given Data / Assumptions:

• A = 1001 (binary) = 9 (decimal).
• B = 1010 (binary) = 10 (decimal).
• No cascading inputs are asserted; we consider only local comparison.

Concept / Approach:
Compare bit by bit from MSB to LSB. The first position where A and B differ determines the outcome. Alternatively convert to decimal and compare numerically.

Step-by-Step Solution:

Verification / Alternative check:
Decimal comparison: 9 < 10, so A

Why Other Options Are Wrong:

• Equal or A>B asserted: These contradict the bitwise or decimal comparison.
• Multiple flags true: In a proper comparator only one of AB can be 1 at a time.

Common Pitfalls:

• Comparing from LSB upward; significant bits must be examined first because they carry higher weight.

Final Answer:
A < B is 1, A = B is 0, A > B is 0.