V2EX rising edge

Rising Edge

Definition 定义

(常用于数字电子/信号处理)上升沿:指信号从低电平跃迁到高电平的那一瞬间(或那段非常短的过渡时间),常用来作为触发事件(如时钟触发、计数、采样)。

Pronunciation 发音(IPA)

/raz d/

Examples 例句

The counter increases on the rising edge of the clock.
计数器在时钟的上升沿递增。

To avoid timing errors, the microcontroller samples the input only on the rising edge, after the signal has stabilized through the buffer.
为避免时序错误,微控制器只在上升沿对输入进行采样,并在信号经过缓冲器稳定之后再读取。

Etymology 词源

rising 来自动词 rise(上升),edge 原意为“边缘、边界”。在电子学语境中,edge 引申为波形从一种状态“跨越边界”到另一种状态的瞬间,因此 rising edge 就是“向上跨越(低到高)的边沿”。(对应的常见反义概念是 falling edge,下降沿。)

Related Words 相关词

Literary Works 文献与作品中的用例

  • The Art of Electronics(Horowitz & Hill) 讨论数字电路时钟与触发,常提及上升沿触发概念。
  • Digital Design and Computer Architecture(Harris & Harris) 在时序电路、触发器与同步设计章节中使用 rising edge
  • CMOS VLSI Design: A Circuits and Systems Perspective(Weste & Harris) 讲解同步系统与时钟边沿(含上升沿/下降沿)相关设计原则。
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