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觸發器

JK觸發器邏輯狀態表、邏輯符號、應用舉例

發布日期：2022-05-18 點擊率：1005

　　1、邏輯狀態表

　　2、邏輯符號

　　注意：電路符號中脈沖CP處的“三角符號＋ο”表示下降沿觸發或后沿觸發；只有“三角符號”表示上升沿觸發或前沿觸發。
該觸發器為下降沿觸發。
　　3、舉例
　　例： 下降沿觸發的J－K觸發器的CP和J、K波形如圖所示，畫出觸發器輸出端Q的波形。設觸發器的初始狀態為0。
　　分析：觸發器為下降沿觸發，首先在脈沖CP波形上找出下降沿，然后根據此時J、K的取值，對照邏輯狀態表得出輸出Q的狀態，其它時刻輸出均保持原態。

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