When FET 108 conducts, {HEAD ~ line} 114 which connects to the gate input of {TAIL ~ FET} 116 connects to ground 112 
When FET 108 conducts , { HEAD ~ line } 114 which connects to the gate input of { TAIL ~ FET } 116 connects to ground 112
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH