Design of Combinational Logic Circuits 1. Design of Logical Units Let A-a3a2a1ao and Bb3b2b1bo be 4-bit binary patterns. Shown below is the structure of a logical unit (LU), consisting of four identical sub- circuits M b2 a3 b3 a1 b1 a0 bo k1 kO k1 k0 k1 kO k1 kO p2 po As specified in the table below, the LU will compute a logical function, depending on the values of control signals k1 and ko