{HEAD ~ The process} is repeated for conversion of {TAIL ~ each bit} of the corresponding digital output word 
{ HEAD ~ The process } is repeated for conversion of { TAIL ~ each bit } of the corresponding digital output word
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH