so that the input to said feedback element is either the data input signal or a combination thereof with the output of {HEAD ~ the feedback element}, as determined by {TAIL ~ said control signal} 
as determined by
so that the input to said feedback element is either the data input signal or a combination thereof with the output of { HEAD ~ the feedback element } , as determined by { TAIL ~ said control signal }
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL