The present invention relates to programmable logic devices, such as field programmable gate arrays , and, in particular, to the logic circuits and {HEAD ~ logic gates} in {TAIL ~ such devices} 
The present invention relates to programmable logic devices , such as field programmable gate arrays , and , in particular , to the logic circuits and { HEAD ~ logic gates } in { TAIL ~ such devices }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL