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Mulitlevel Logic and Divisor Extraction—Multiple Cube Case

Course video 24 of 30

You now know that to factor a multi-level network to reduce its complexity, you must look at the kernels and co-kernels. You know how to "get" these for any node. But -- what do you do with a big network to actually FIND the right common divisors? This is called EXTRACTION. We then look at a new opportunity to optimize multi-level logic: Don't Cares. In simple designs, we usually regard Don't Cares as "impossible inputs" -- things that just do not happen, so we can choose the value the hardware creates to minimize the logic.

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