A voltage stimulus applied to the drain forces {HEAD ~ current} to flow through {TAIL ~ the channel} coupling the drain to the source 
to flow through
A voltage stimulus applied to the drain forces { HEAD ~ current } to flow through { TAIL ~ the channel } coupling the drain to the source
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH