Design the internal logic and also analog circuits for a FOUR-BIT successive approximation Analog-to-Digital Converter(A/D). Recognizing that such a system incorporates a Digital-to-Analog Converter(D/A), make sure to design the details of the D/A using a Weighted Resistor( NOT R-2R) technique, as well as the logic details of the sequencer/decision maker/state machine which sequences the A/D through its conversion steps to convert an analog input into a 4-bit binary number.