{HEAD ~ The DA} converted circuit unit is arranged between {TAIL ~ the comparator circuit unit} and the arithmetic operation amplifying circuit unit 
{ HEAD ~ The DA } converted circuit unit is arranged between { TAIL ~ the comparator circuit unit } and the arithmetic operation amplifying circuit unit
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH