Singed M_by_M multiplication

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Are you asking about how this type of multiplier works at silicon level (its architecture) or are you asking how to multiply in fpga?

I personally don't know about various architectures of multiplier technology, I just multiply and get the output and leave that to the tool.

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thanks for replying Kaz, i meant the architecture, i want to implement my own, i did the unsigned on but not familiar with the signed one(s)...