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一、数字信号与模拟信号如图1所示,数字信号在变化中只有两个对立的状态:一个状态是高电压,一个是低电压.用“1”和“0”表示,体现“有”或者“没有”.而模拟信号变化则是连续的.二、简单逻辑关系1.与逻辑关系和门电路当决定一件事情的各个条件全部具备,这一件事情才会发生,这种因果关系我们称之为“与逻辑关系”.在日常生活中,这种逻辑关系举目皆是.例如:保险柜的门要2把钥匙同时插入才能打开,就是一种与逻辑关系.满足与逻辑关系的电路门称为与门,这种门的特点是输人端口(如图2中的A和B)和输出端
First, the digital signal and analog signal As shown in Figure 1, the digital signal changes in the opposite state only two: one state is a high voltage, one is a low voltage. “1 ” and “0 Reflects the ”“ or ”No “ while the analog signal change is continuous. Second, the simple logical relationship 1 and the logical relationship and the gate When determining the conditions of all things have one thing, this one thing This causal relationship, we call it ”and the logical relationship." In everyday life, this logical relationship are mentioned. For example: the door to the safe to insert two keys to open at the same time, is a The relationship between the logic and the logic circuit door to meet and called the door, the door is characterized by the input port (Figure 2, A and B) and the output