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