BCD to Excess-3 Converter

Question

Problem: BCD to Excess-3 Converter. Solve this hands-on electronics task on EWskills.

Accepted Answer

Output Select Analysis: By treating the invalid decimal combinations (1010 through 1111) as don't-care states, Karnaugh maps simplify the logic equations to add three to the incoming data efficiently. The lowest bit E0 simply requires inverting the lowest input bit.
Hardware Optimization: The circuit splits the BCD inputs into inverted and non-inverted signal paths using NOT gates. These lines feed into separate AND-OR networks for E3, E2, and E1, minimizing the transistor footprint while ensuring precise code translation.

Boolean Equations:

45. BCD to Excess-3 Converter