At the non inverting input of operational amplifier Ao, {HEAD ~ Voffset} indicates {TAIL ~ an inevitable small but nonzero offset voltage} 
indicates
At the non inverting input of operational amplifier Ao , { HEAD ~ Voffset } indicates { TAIL ~ an inevitable small but nonzero offset voltage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL