FOXBORO P0901VK

TW-65801-L037B

FOXBORO P0901VK

Fu Zhou ZhuoKai  Electric Co., Ltd.

1.邏輯常量與變量：邏輯常量只有兩個，即0和1，用來表示兩個對立的邏輯狀態。邏輯變量與普通代數一樣，也可以用字母、符號、數字及其組合來表示，但它們之間有著本質區別，因為邏輯變量的取值只有兩個，即0和1，而沒有中間值。

　　2.邏輯運算：在邏輯代數中，有與、或、非三種基本邏輯運算。表示邏輯運算的方法有多種，如語句描述、邏輯代數式、真值表、卡諾圖等。

　　3.邏輯函數：邏輯函數是由邏輯變量、常量通過運算符連接起來的代數式。同樣，邏輯函數也可以用表格和圖形的形式表示。

　　4.邏輯代數：邏輯代數是研究邏輯函數運算和化簡的一種數學系統。邏輯函數的運算和化簡是數字電路課程的基礎，也是數字電路分析和設計的關鍵。

式中小圓點“·”表示A、B 的與運算，又稱邏輯乘。在不致引起混淆的前提下，乘號“·”被省略。某些文獻中，也有用符號 ∧、∩表示與運算的。

　　真值表：如果開關不通和燈不亮均用0表示，而開關接通和燈亮均用1表示，得到如圖1（c）所示的真值表描述。真值表的左邊列出為所有變量的全部取值組合，右邊列出的是對應于A，B變量的每種取值組合的輸出。因為輸入變量有兩個，所以取值組合有22＝4種，對于n個變量，應該有2n種取值組合。

福州卓凱電子科技有限公司

【誠信】 【質量保證】  【價格優惠】   

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