The DUT consists of {HEAD ~ one branch} of {TAIL ~ parallel transistors} in series with a resistor 
The DUT consists of { HEAD ~ one branch } of { TAIL ~ parallel transistors } in series with a resistor
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH