@outcastoredwall Some JKFFs change on the rising edge, some change on the falling edge. It depends on their internal circuitry. When looking at the schematic symbol, a falling edge triggered FF is usually indicated by a bubble/circle drawn right at the clock input.
@Nshuti57109: Clear and Preset are asynchronous inputs (meaning they cause a change in the output immediately instead of waiting until the clock edge) and override the state of the J and K inputs. Clear and Preset ARE NOT supposed to both be active at the same time...it's like saying I want the output to Cleared to '0' and Set to '1' simultaneously (might work on a quantum computer?? ;-). However, it could happen, so if Clear and Preset are both active, Q and Q-bar will both be set to '1'.
Humm.. I am curious! we have seen that It's all about Clear and Preset! so whenever any of these occurs (goes LOW)! we ignore all the clock or any state of the current J or K and do whatever Preset os Clear is at that point right?
What about when both Clear and Preset goes Low at the same time?
( I was trying to draw my own timing Diagram and i noticed that i somehow drew both Clear and Preset Low at a particular point what is Q going to be there?)
That's right. When you write out "Not Q", you often write it as Q with a line or bar over top, so it's common to say "Q-bar" instead of "Not-Q" or "Q-Not"
lmao, delirious indeed
that was funny
ChristianKrause89 13 hours ago
Also, aren't most J-K flip flops usually master slave? So they change when the clock is low?
outcastoredwall 1 week ago
How do we "know" that the J-K flip flop only changes on the rising edge, if we don't have the timing diagram?
outcastoredwall 1 week ago
@outcastoredwall Some JKFFs change on the rising edge, some change on the falling edge. It depends on their internal circuitry. When looking at the schematic symbol, a falling edge triggered FF is usually indicated by a bubble/circle drawn right at the clock input.
tarbidian 1 week ago
dude.. i <3 u. You saved my assignment.
Thanks. Subscribed.
yeezul 3 weeks ago
What does toggle mean????
hello838 2 months ago
@hello838 it means to either change from a '0' to a '1' or from a '1' to a '0'
tarbidian 2 months ago
Is Red Stone based on this?
bassie52 2 months ago
@bassie52 yes, redstone can be used to build digital circuits (like the JK and T flip flops) in Minecraft
tarbidian 2 months ago
@tarbidian It looks very diffirent in real life. Also, how is this style of cirquitery called?
bassie52 2 months ago
@bassie52 it's called digital circuitry
tarbidian 2 months ago
Amazing!
CrashPlague 2 months ago
you're my new digital electronics lecturer!!
thanx for the upload!
anglsmrt 3 months ago
Dude !! Amazing video man.. Helped a lot. Thanks !!
fireblade9593 4 months ago
@Nshuti57109: Clear and Preset are asynchronous inputs (meaning they cause a change in the output immediately instead of waiting until the clock edge) and override the state of the J and K inputs. Clear and Preset ARE NOT supposed to both be active at the same time...it's like saying I want the output to Cleared to '0' and Set to '1' simultaneously (might work on a quantum computer?? ;-). However, it could happen, so if Clear and Preset are both active, Q and Q-bar will both be set to '1'.
tarbidian 6 months ago
@tarbidian
Excellence Explanation.
Thank you again :))
Nshuti57109 6 months ago
Humm.. I am curious! we have seen that It's all about Clear and Preset! so whenever any of these occurs (goes LOW)! we ignore all the clock or any state of the current J or K and do whatever Preset os Clear is at that point right?
What about when both Clear and Preset goes Low at the same time?
( I was trying to draw my own timing Diagram and i noticed that i somehow drew both Clear and Preset Low at a particular point what is Q going to be there?)
Thank you.
Nshuti57109 6 months ago
All your logic videos are so clear and great at explaining their content! These have def. helped me study, thanks.
1anonymousmouse 10 months ago
@tarbidian Cool, thx.
Joncomm 1 year ago
That's right. When you write out "Not Q", you often write it as Q with a line or bar over top, so it's common to say "Q-bar" instead of "Not-Q" or "Q-Not"
tarbidian 1 year ago
"Q-bar" is the same thing as "Q-not", right?
Joncomm 1 year ago