Sample/hold circuit 171 captures {TAIL ~ the analog data} for processing by {HEAD ~ filter} 50 
Sample / hold circuit 171 captures { TAIL ~ the analog data } for processing by { HEAD ~ filter } 50
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH