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My question is: how to make truth table for inputs on E3? There is only space for 2 bits, and E3 is written on 4 bits as I saw. Should I add more inputs for this situation or do this in different way?

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Your question isn't clear but if you have 4 output states, you only need 2 bit input because 2^2 = 4, so that's enough. Hope that answers enter image description here

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  • \$\begingroup\$ Thank you! But I have a problem with putting EXCESS-3 code on 2 inputs? How it will look like? \$\endgroup\$ – JimPanse Mar 21 '18 at 10:15
  • \$\begingroup\$ i have edited the answer \$\endgroup\$ – Luís Filipe Mar 21 '18 at 10:29

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