During conversion, the analog input voltage is applied to a first device and a selected one of the predetermined digital control words is applied to {HEAD ~ a second device} which is coupled to the first device through {TAIL ~ an amplifying feedback network} 
is coupled through
During conversion , the analog input voltage is applied to a first device and a selected one of the predetermined digital control words is applied to { HEAD ~ a second device } which is coupled to the first device through { TAIL ~ an amplifying feedback network }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL