Let's first see about getting your image to a reasonable size and orientation:It's given time course of the inputs. I need to circle is Q 1,0 or not known (unbekannt). Can someone help me with this example?
I think I misread your intent. I thought you were refusing to answer the question, when in fact I think you WERE answering the question.No :/
What is step 2?I think I misread your intent. I thought you were refusing to answer the question, when in fact I think you WERE answering the question.
That is correct, you do not know what the initial state of the flip flop is.
That's fine -- that's one of the three options available to you. So now go on to step #2.
How I know that in period 5 J and K=1
The clock signal has it's first rising edge (a transition from LOW to HIGH), at the beginning of period #5
- When the clock signal (CLK) is HIGH, the output Q cannot change.
- When the clock signal (CLK) is LOW, the output Q cannot change.
- When the clock signal (CLK) has a falling edge (a transition from HIGH to LOW), the output Q cannot change.
Therefore Q must be unknown in periods #1, #2, #3, and #4 because it was unknown in time period #1, and it has not changed.
Just before the rising edge at the beginning of time period #5, J=K=1 which means that when the rising clock edge arrives the flip-flop will do what?
Choose one of the following:
If your answer is 1 or 2 then you know the value of Q. If your answer is 3 or 4, then you still don't know and you must proceed to the next step. which time period has the next rising edge of the clock (CLK)?
- Clear to 0
- Set to 1
- Do nothing
You look at the diagram.How I know that in period 5 J and K=1
Same, but i just started learning flip flops so it's still unclear to me. So J is 1 until period 6 or?You look at the diagram.
To me the diagram is showing quite clearly the values 0 and 1, true and false, high and low. What did you think the diagram was showing?
- In time period #5, J is clearly higher than it is in time period #6
- In time period #5, K is clearly higher than it is in time period #3
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by Steve Arar
by Steve Arar