A ratio generator is preferably provided as the logic element to develop a logic signal that is {HEAD ~ a function} of {TAIL ~ the ratio} of the partial currents 
of
A ratio generator is preferably provided as the logic element to develop a logic signal that is { HEAD ~ a function } of { TAIL ~ the ratio } of the partial currents
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 OTH OTH OTH OTH