Help w/ sequential circuit, completing a timing diagram

Thread Starter


Joined Oct 22, 2014
I am having an issue completing a timing diagram for a jk flip flop. When the inputs are already laid out there are no issues but when I am given just the circuit diagram I cant complete it. I would appreciate some help sending me in the right direction.



Joined Mar 31, 2012
First, note that your circuit has both a JKFF and a TFF.

What do you mean by "when the inputs are already laid out"? You have three inputs, Clock, Clr, and X. Are those not already laid out for you in that diagram?

Start from the beginning of your diagram and determine the outputs of both FF for the initial value of the inputs. Since the Clr is asserted, you don't have to worry about what state they were in before the start of the diagram because the Clr forces them into a known state.