A first transistor, in responsive to the output of the amplifier, biases the input of {HEAD ~ the amplifier} to assure substantially no static current flows through the amplifier when {TAIL ~ a logic low} is present on the amplifier output 
A first transistor , in responsive to the output of the amplifier , biases the input of { HEAD ~ the amplifier } to assure substantially no static current flows through the amplifier when { TAIL ~ a logic low } is present on the amplifier output
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH