Combinational Logic Design (Logisim)

Thread Starter


Joined 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. :)