Question: Assume that the inputs to the circuit in given problem are BCD values. That is, only patterns corresponding to 0 through 9 are valid. Design the circuit.
Problem: Assume that a combinational circuit has four inputs and one output. The output is the ODD parity bit for the 4-bit data on the input. That is, the output is 1 if the number of nonzero bits in the input is even; otherwise, it is 0. Draw the truth table and implement a minimum circuit.