{HEAD ~ The output} of the comparator 113 is provided to {TAIL ~ digital processing circuitry} 121 
is provided to
{ HEAD ~ The output } of the comparator 113 is provided to { TAIL ~ digital processing circuitry } 121
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH