4 digit sign/magnitude to two's complement
4 digit sign/magnitude to two's complementIf most sig. digit is 1 then we add -1(or 1111 in 4 digits) and then invert the other three digits.
If most sig. digit is 0 then we don't add anything(or add 0000) and don't invert any digits.
Used adders, 3 NOT gates and 3 demultiplexers.
