PHYS345 Electricity and Electronics

Hint for 13-35

The desired truth table for the adder module is:
  Ci     A     B     Co     S  
0 0 0 0 0
0 0 1 0 1
0 1 0 0 1
0 1 1 1 0
1 0 0 0 1
1 0 1 1 0
1 1 0 1 0
1 1 1 1 1

Construct two Karnaugh maps, one for each output. Notice the checkerboard pattern in the one, which should remind you of one of the lab exercises involving XOR gates.


"http://www.physics.udel.edu/~watson/phys345/protected/exercises/hints/13-35b.html"
Last updated Nov. 8, 1999.
Copyright George Watson, Univ. of Delaware, 1999.