an output driver, with {HEAD ~ a differential output} connected to {TAIL ~ an external precision resistor}, that receives the driving current and generates a differential signal at the differential output utilizing the driving current according to a data signal 
an output driver , with { HEAD ~ a differential output } connected to { TAIL ~ an external precision resistor } , that receives the driving current and generates a differential signal at the differential output utilizing the driving current according to a data signal
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH