The temperature independent voltage across {TAIL ~ the common resistor} and the base emitter junction of the second transistor is buffered by {HEAD ~ a unity gain amplifier} 
The temperature independent voltage across { TAIL ~ the common resistor } and the base emitter junction of the second transistor is buffered by { HEAD ~ a unity gain amplifier }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD