The first feedback mode is not {HEAD ~ a self correcting mode} since errors in the output bit state from {TAIL ~ the sampling stage} or from the feedback stage are not corrected 
The first feedback mode is not { HEAD ~ a self correcting mode } since errors in the output bit state from { TAIL ~ the sampling stage } or from the feedback stage are not corrected
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH