Open ended task: Construct the logic for 4-bit binary adder-subtractor using 4-bit parallel adder and XOR gates, draw the logic diagram, construct the circuit on hardware and complete the truth table. For Adder Logic: INPUT OUTPUT A4 A3 A2 A1 Decimal B4 B3 B2 B1 Decimal E(CoutS4S3S2S1) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 Hint: For adder logic, Co = 0

Using full adders in block diagram, other needed logic gates. Show the design of a circuit that performs A – B based on using 2's complement arithmetic where A and B are two unsigned 4-bit numbers. State the condition for error in your design.

A three-phase, three wire, ABC system with an a line voltage of 100 Volt, has three impedances of 4 - j 4 in Delta connection. Determine the line current, phase current, phase and line voltage and draw the voltage-current phasor diagram.

Can the expert draw a full adder gate?