I have a simple binary FSK demodulator circuit based on the old 74HC297 DPLL, a divide-by-4 counter, and a flip flop. I'm interested in seeing how many such circuits I could pack into a cheap FPGA like one of these:
but I'm not sure where to start. I'm just trying to figure out a ballpark number, i.e. "one copy will just barely fit" or "seems like you should be able to get five copies in there with room to spare".
Is this a common kind of problem - translating old-school discrete chip designs into FPGA? I did a lot of googling for resources along this vein but didn't come up with much.
At the low price of the fpga4fun board, it's almost an impulse buy, but I wanted to ask the newsgroup first and mull it over.
Rob