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正脉冲和负脉冲

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Post time 2017-10-19 23:10:12 | Show all posts |Read mode
脉冲指电子电路中的电平状态突变,既可以是突然升高(脉冲的上升沿),也可以是突然降低(脉冲的下降沿). 正脉冲就是脉冲的上降沿;负脉冲就是脉冲的下降沿。相对高于基准电平的脉冲就是正脉冲,低于基准电平的脉冲就是负脉冲。基准电平是电子电路的公共地,当然也可以接大地。

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