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电路常见概念 #27

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@leonclab

上拉电阻/下拉电阻

在数字电路中,上拉电阻(英语:Pull-up resistors)是当某输入端口未连接设备或处于高阻抗的情况下,一种用于保证输入信号为预期逻辑电平的电阻元件。他们通常在不同的逻辑器件之间工作,提供一定的电压信号

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