Are these tables the same?

Thread Starter

Superboy23

Joined Jun 17, 2019
10
Hi!
Is it possible from the table in the figure to go back to the circuit? (without know the circuit) sorry for my bad english


I tried to do that but the logical expression are different in mine. Mine are: Y1=(y1'y2x')+(y1+y2'x)+(y1y2x')+(y1y2x)
There instead: Y1= xy1+x'y2
Can you help me? Please



[1]: https://i.stack.imgur.com/6w5pz.png
[2]:
 

MrChips

Joined Oct 2, 2009
30,824
If you have feedback in the circuit, it is no longer a straight combinational circuit.
It now becomes a sequential circuit.
 

Thread Starter

Superboy23

Joined Jun 17, 2019
10
If you have feedback in the circuit, it is no longer a straight combinational circuit.
It now becomes a sequential circuit.
Yes i know its an asynchronous circuit
So I can't go back to the combinational circuit from the state table?
My question is, how can i go back to the circuit knowing only the status table (in the first picture)
 

Thread Starter

Superboy23

Joined Jun 17, 2019
10
The table of the first and second images are the same, however, written differently. I wanted to know if it was possible to go back to the circuit without knowing it directly (only with the table in image 1)
 

MrChips

Joined Oct 2, 2009
30,824
There are many ways to implement this sequential function.
I don't see how you can arrive back at the original table.

Have you tried drawing a Mealy state diagram?
 
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