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