However, persons skilled in the art can alter an input signal of {HEAD ~ an input end} of the DDA 316 according to {TAIL ~ the above disclosure} 
However , persons skilled in the art can alter an input signal of { HEAD ~ an input end } of the DDA 316 according to { TAIL ~ the above disclosure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL