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