For example, if the two inputs 10, 12 have identical voltages, the differential pair is split evenly and {HEAD ~ the circuitry} creates {TAIL ~ a current sink} that has the same current as the current source 
creates
For example , if the two inputs 10 , 12 have identical voltages , the differential pair is split evenly and { HEAD ~ the circuitry } creates { TAIL ~ a current sink } that has the same current as the current source
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH