The center region 34 is {HEAD ~ the shared diffusion region} of {TAIL ~ the cascode connected transistors} of the present invention 
of
The center region 34 is { HEAD ~ the shared diffusion region } of { TAIL ~ the cascode connected transistors } of the present invention
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH