A carry logic circuit for a field programmable gate array (FPGA) which allows a carry input signal to be propagated through the carry logic circuit without passing through a multiplexer of another series connected circuit element. The carry logic circuit uses a function generator of the FPGA to provide...http://www.google.com.au/patents/US5629886?utm_source=gb-gplus-sharePatent US5629886 - Method and structure for providing fast propagation of a carry signal in a field programmable gate array
