In another embodiment, internal regulation signals are shared with {HEAD ~ other devices} via {TAIL ~ TSVs} 
In another embodiment , internal regulation signals are shared with { HEAD ~ other devices } via { TAIL ~ TSVs }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL