{TAIL ~ The predetermined digital control word} is selected as {HEAD ~ a function} of the bit being converted and the preceding bits 
{ TAIL ~ The predetermined digital control word } is selected as { HEAD ~ a function } of the bit being converted and the preceding bits
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH