Trigger Circuit of Devices

Published:2011/7/16 0:41:00 Author:Felicity | Keyword: Trigger | From:SeekIC

We have three ways to describe the logical function of trigger. First is characteristic equation. Second is characteristic table and the third one is state transition diagram. (showed in picture 1,2,3,4) Picture 1 shows the state transition diagram of RS Trigger. Picture2 shows the state transition diagram ofJK Trigger. Picture3 shows the state transition diagram and logical symbol ofJK Trigger. Picture4 shows the state transition diagram ofD Trigger. 　Characteristics table is actually a special kind of truth table and it has a very specific description of trigger.The input variables (independent variables)of truth table are not only data entry but also initial states of flip-flop. And the output variable (dependent variable) is the next state flip-flop. Characteristic equation is out from the feature table summarizes so it's more concise. State transition diagramwhich describes the methodsis very intuitive.



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