The operational amplifier having the lowest input signal will draw {HEAD ~ sufficient current} from {TAIL ~ V+} to bring the value of line 15 to that potential 
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The operational amplifier having the lowest input signal will draw { HEAD ~ sufficient current } from { TAIL ~ V+ } to bring the value of line 15 to that potential
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH