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