Question 9864 – Digital-Logic-Design

Design a logic circuit to convert a single digit BCD number to the number modulo six as follows (Do not detect illegal input):
(a) Write the truth table for all bits. Label the input bits I₁, I₂, …. With I₁ as the least significant bit. Label the output bits R₁, R₂, …. With R₁ as the least significant bit. Use 1 to signify truth.
(b) Draw one circuit for each output bit using, altogether, two two-input AND gates, one two-input gate and two NOT gates.

Correct Answer: A