{HEAD ~ A second transistor} couples {TAIL ~ at least one logic input} of the logic circuit to the input of the amplifier 
couples
{ HEAD ~ A second transistor } couples { TAIL ~ at least one logic input } of the logic circuit to the input of the amplifier
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH