In {HEAD ~ other instances}, well known structures and devices are shown in {TAIL ~ block diagram form} in order to avoid unnecessarily obscuring the present invention 
In { HEAD ~ other instances } , well known structures and devices are shown in { TAIL ~ block diagram form } in order to avoid unnecessarily obscuring the present invention
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH