Finally, circuits are described which show {HEAD ~ embodiments} of {TAIL ~ the invention} according to the two methods 
Finally , circuits are described which show { HEAD ~ embodiments } of { TAIL ~ the invention } according to the two methods
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH