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