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