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