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