a second element processed to generate {HEAD ~ a functional computer executable representation} of {TAIL ~ a reference precision resistor} 
a second element processed to generate { HEAD ~ a functional computer executable representation } of { TAIL ~ a reference precision resistor }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL