Control signal 47 may be supplied by control path 18, a schematic diagram of which is shown in FIG 4 in {HEAD ~ accordance} with {TAIL ~ an embodiment} of the present invention 
with
Control signal 47 may be supplied by control path 18 , a schematic diagram of which is shown in FIG 4 in { HEAD ~ accordance } with { TAIL ~ an embodiment } of the present invention
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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH