A third semiconductor region of the first conductivity type is disposed on the second semiconductor well and in {TAIL ~ electrical communication} with {HEAD ~ the circuit electrode} 
A third semiconductor region of the first conductivity type is disposed on the second semiconductor well and in { TAIL ~ electrical communication } with { HEAD ~ the circuit electrode }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD