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Combinational Logic Design (Logisim)

Discussion in 'Homework Help' started by crimsondoll, Feb 14, 2012.

  1. crimsondoll

    Thread Starter New Member

    Feb 14, 2012
    Hi, I'm not new to combinational logic but I don't understand how to get from truth tables or expressions to actual circuits. I'm using a program called Logisim to display everything.

    I need to show a signed 4 bit binary number using a 5 bit binary number as the input and display the output using 2 hex digit displays, one for the sign and one for the actual value. The circuit also has to use 2's complement to show negative numbers and can only use AND/OR/NOT gates.

    Like I said before, I'm really interested in the process of how you get from a truth table or expression or however you start, to an actual circuit so step-by-step processes would be much appreciated. :)