The capacitor voltage is applied to the source of the first field effect transistor, the source of the second field effect transistor, and to a bottom of {HEAD ~ the reference precision resistor} acting as {TAIL ~ a virtual ground} 
acting as
The capacitor voltage is applied to the source of the first field effect transistor , the source of the second field effect transistor , and to a bottom of { HEAD ~ the reference precision resistor } acting as { TAIL ~ a virtual ground }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL