V2EX current-limiting resistor

Current-limiting Resistor

定义 Definition

限流电阻:在电路中用来限制电流大小的电阻元件,常用于保护 LED、IC、晶体管等器件,防止电流过大导致过热或损坏。(也常见写法:current limiting resistor

发音 Pronunciation (IPA)

/krnt lmt rzstr/

词源 Etymology

这是一个由三部分组成的技术短语:current(电流)+ limiting(限制的)+ resistor(电阻器)。含义直观:用“电阻器”来实现“限制电流”的目的。相关概念在早期电工与电子工程教材中就已固定使用。

例句 Examples

Connect a current-limiting resistor in series with the LED.
把一个限流电阻与 LED 串联连接。

To protect the microcontroller’s output pin, the designer added a current-limiting resistor so that accidental shorts wouldn’t draw excessive current.
为保护微控制器的输出引脚,设计者加入了限流电阻,使得意外短路时也不会产生过大的电流。

相关词 Related Words

文学与经典教材中的用例 Literary & Notable Works

  • The Art of Electronics(Horowitz & Hill,《电子学艺术》):在 LED 驱动、输入/输出保护与接口电路中经常讨论“限流电阻”的选取与作用。
  • Practical Electronics for Inventors(Scherz & Monk,《发明者实用电子学》):在基础元件与应用电路章节中反复出现该术语,用于解释器件保护与电流计算。
  • Make: Electronics(Charles Platt,《动手做电子学》):在入门实验(尤其是 LED 电路)中常用“current-limiting resistor”描述必需的串联电阻。
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