The upper curve of FIG 3 illustrates {TAIL ~ current voltage characteristics} of {HEAD ~ a typical positive temperature coefficient thermistor} 
The upper curve of FIG 3 illustrates { TAIL ~ current voltage characteristics } of { HEAD ~ a typical positive temperature coefficient thermistor }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD