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I have designed a simple 4 bit adder for adding two 4-bit unsigned integers A and B.

The adder consists of a chain of 4 Full-Adders (Ripple-Carry adder).

I am wondering if I need to change the circuit when A and B are in 2s complement.

I don't think so. Isn't the advantage of 2s complement that the circuit does not change?

Thanks

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# Ripple-Carry Adder for 2s complement

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