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