# Really confused on this Question

Discussion in 'Homework Help' started by Shamieh, Apr 17, 2014.

1. ### Shamieh Thread Starter Member

Oct 24, 2013
36
1
Derive a sequential circuit with two inputs (S1 and S2) and one output (z) using D flip flops that will output z=1 if a S1=S2=0 is input, then a S1=S2=1 is input, then a S1=S2=0 is input. Any other sequences of these inputs should output a z = 0. Overlapping sequences should also be detected (ie 00->11->00->11->00 should output 0 0 0 1 0 1). Use a Moore model, and show all of your work including the state machine, state table, state assignment, state assignment table, and the final circuit.

2. ### WBahn Moderator

Mar 31, 2012
23,730
7,294
So.... what's your question?

What are you confused about?

What efforts have you made so far?

3. ### crutschow Expert

Mar 14, 2008
21,125
6,011
There problem seems rather straight-forward, so the confusion seems to be in your understanding of the problem. So what do you understand and what don't you understand?

4. ### tshuck Well-Known Member

Oct 18, 2012
3,527
679
We aren't going to simply hand over the answer, but we will help you through the problem. In order to do this, however, we need to know what you do and do not understand about the problem. Please post your work and approach so we can know where you need help.

You may want to look at the eBook article on Finite State Machines (FSMs). The methods presented are of the Moore type.