The operational amplifier will continue to attempt to equalize its inputs until {HEAD ~ the voltage} appearing at its output is approximately equal to {TAIL ~ the output} of voltage source V+  
is approximately equal to
The operational amplifier will continue to attempt to equalize its inputs until { HEAD ~ the voltage } appearing at its output is approximately equal to { TAIL ~ the output } of voltage source V+
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH