With continuing reference to FIG 3 in combination with FIG 4, {TAIL ~ operation} of control path 18 and {HEAD ~ control signal} 47 is described 
With continuing reference to FIG 3 in combination with FIG 4 , { TAIL ~ operation } of control path 18 and { HEAD ~ control signal } 47 is described
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH