空翻現象,又稱為競態現象,是數字電路中的一個術語,指在同一個時鐘脈衝信號作用區間內,由於時鐘脈衝的寬度過大,觸發器出現在「0」「1」兩邏輯信號中多次翻轉的現象。它限制了同步RS觸發器在實際工作中的正常應用。

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