An adder device adds the signals of the scaled input and digital arrays at {HEAD ~ corresponding array positions} to form {TAIL ~ the output analog array} 
to form
An adder device adds the signals of the scaled input and digital arrays at { HEAD ~ corresponding array positions } to form { TAIL ~ the output analog array }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL