Further referring to FIG 1, the prior art amplifier 2 operates as follows: When there is a difference in the voltages of the inputs 10, 12, {HEAD ~ a current imbalance} is created in {TAIL ~ the output stage} to either the source or sinking transistors so that more current is being sourced or sinked, depending on the polarity of the imbalance 
Further referring to FIG 1 , the prior art amplifier 2 operates as follows : When there is a difference in the voltages of the inputs 10 , 12 , { HEAD ~ a current imbalance } is created in { TAIL ~ the output stage } to either the source or sinking transistors so that more current is being sourced or sinked , depending on the polarity of the imbalance
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH