A source electrode s of the transistor 12 is connected to a grounded terminal 19 having {HEAD ~ a ground potential} equal to {TAIL ~ OV} 
equal to
A source electrode s of the transistor 12 is connected to a grounded terminal 19 having { HEAD ~ a ground potential } equal to { TAIL ~ OV }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL