1. Simplify f(A,B,C,D) = ∑(0,1,2,8,9,12,13), d(A,B,C,D) = ∑(10,11,14,15)
2. Design a 2 bit countdown circuit with T FFs. Counts: 3 2 1 0 3 2 1 0 . . .
3. Design the circuit for the state diagram of Figure 1. x and y are two inputs. Use S-R flip-flops.
4. pg 160 #39 - also create the state diagram (Moore).
5. pg 160 #40 - also create the state diagram. Note: x,y, and z are inputs, s is an output.
6. pg 160 #41 - also create the state diagram.

Figure 1