:Timing Diagram for JK Flip Flop

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Discussion Overview

The discussion revolves around the requirements for drawing a timing diagram for a JK flip-flop, specifically whether it is necessary to include the output of Q bar (NOT Q) alongside the output Q and the inputs J and K. The scope includes conceptual clarification and technical explanation related to digital logic design.

Discussion Character

  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant asks if it is necessary to state the output of Q bar when drawing the timing diagram, suggesting a need for clarification on this point.
  • Another participant responds that the necessity depends on the assignment requirements, indicating variability in expectations.
  • A further contribution clarifies that Q bar can be referred to as just Q bar, emphasizing that it represents NOT Q, and points out a potential misunderstanding regarding the term "knot."
  • Another participant suggests that Q bar is generally only shown if it will be used later in the logic, noting that unused outputs typically do not need to be displayed, while all inputs must be shown to ensure they are driven correctly.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of including Q bar in the timing diagram, indicating that there is no consensus on this matter. The discussion remains unresolved regarding the specific requirements for different assignments.

Contextual Notes

Limitations include the dependence on specific assignment requirements and the potential for varying interpretations of what constitutes necessary information in timing diagrams.

teng125
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for j k flip flop,there is a inverse clock,Q(output) , Q bar(knot) output ,J and K
when drawing the timing diagram,is it necessary to state the output of the Q bar (knot) or only the Q (output) is enough??


pls help
 
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teng125 said:
when drawing the timing diagram,is it necessary to state the output of the Q bar (knot) or only the Q (output) is enough??

that depends on your assignment requirement.
 
teng125 said:
for j k flip flop,there is a inverse clock,Q(output) , Q bar(knot) output ,J and K
when drawing the timing diagram,is it necessary to state the output of the Q bar (knot) or only the Q (output) is enough??
just a clarification.. You may state the negation of Q as just Q bar .. We understand it to mean NOT Q .. Your spelling knot is a homonym. It sounds like NOT but has a different meaning.
 
You would generally only show Q- in your timing diagram if you were going to use it for something later in the logic. You wouldn't usually show outputs that are unused. You do need to show all inputs, however, since you need to be sure to drive them with something.
 

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