51问答网 > 判断题第一题，是对的还是错的，高阻状态算什么

判断题第一题，是对的还是错的，高阻状态算什么

2025-04-08 06:34:20
推荐回答（1个）
回答1：

不对这是理想状态。
理想的数字电路电平是这样的：输入小于1/2VCC(电源电压)就是低电平，反之是高电平。实际的器件是做不到的，也不实用，如果输入电压在1/2VCC附近有干扰，就会发生错误的输入信号。现在常用的是：TTL数字电路电源是5V，2.7V < 高电平 < 5V, 0V < (=) 低电平 < 1.3V。CMOS数字电路电源电压一般是3V--9V, 2/3VCC < 高电平 < (=) VCC,0V < (=) 低电平<1/3VCC。

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