A current mirror 110 comprising {HEAD ~ current sources} 112 and 114 furnishes a current I112 to NPN transistor 106 and {TAIL ~ a current I114} to transistor 108, and maintains currents I112 and I114 equal 
A current mirror 110 comprising { HEAD ~ current sources } 112 and 114 furnishes a current I112 to NPN transistor 106 and { TAIL ~ a current I114 } to transistor 108 , and maintains currents I112 and I114 equal
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH