In low supply voltage applications, voltage drop due to transistors of amplifier circuitry can be significant and can affect {HEAD ~ possible range} of {TAIL ~ output voltage swing} 
In low supply voltage applications , voltage drop due to transistors of amplifier circuitry can be significant and can affect { HEAD ~ possible range } of { TAIL ~ output voltage swing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL