Design a four-input priority encoder with inputs as in given Table, but with input𝐷0 having the highest priority and input 𝐷3 the lowest priority?

A priority encoder is a type of encoder that includes the priority function. The priority function allows for the input with the highest priority to take precedence when two or more inputs are simultaneously active. In this case, we are designing a four-input priority encoder with D0 having the highest priority and D3 the lowest.

Here are the steps to design a four-input priority encoder:

1. Identify the inputs and outputs: The inputs are D0, D1, D2, and D3. The outputs are two bits that represent the highest priority active input.

2. Create the truth table: The truth table for a four-input priority encoder with D0 as the highest priority and D3 as the lowest priority is as follows:

Note: X means "don't care", which means that the input can be either 0 or 1.

3. Derive the Boolean expressions for the outputs: From the truth table, we can derive the Boolean expressions for the outputs. Let's denote the outputs as Y1 and Y0.

Y1 = D2 + D1*D0' Y0 = D1 + D0

4. Implement the circuit: The final step is to implement the circuit using logic gates. The circuit will have four inputs (D0, D1, D2, D3) and two outputs (Y1, Y0). The logic gates are arranged according to the Boolean expressions derived in the previous step.

Please note that this is a simplified explanation and actual implementation may require additional considerations such as handling of invalid input combinations.