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