An electrical connection is provided to opposite ends of {HEAD ~ the cathode} through {TAIL ~ two or more low resistance resistors} with high temperature coefficients of resistance 
An electrical connection is provided to opposite ends of { HEAD ~ the cathode } through { TAIL ~ two or more low resistance resistors } with high temperature coefficients of resistance
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH