at least one additional transistor having {HEAD ~ two output terminals} coupling between an additional input node and {TAIL ~ the intermediate node} 
coupling between
at least one additional transistor having { HEAD ~ two output terminals } coupling between an additional input node and { TAIL ~ the intermediate node }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL