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Demonstration of negative group delays in a simple electronic circuit

机译:演示简单电子电路中的负群延迟

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We present a simple electronic circuit that produces negative delays. When a pulse is sent to the circuit as input, the output is a pulse with a similar wave form that is shifted forward in time. The advance time or negative delay can be increased to the order of seconds so that we can observe the advance with the naked eye by observing two light emitting diodes that are connected to the input and the output. The negative group delay in the electronic circuit shares the same mechanism with superluminal light propagation, where the group velocity exceeds the speed of light or even becomes negative. (C) 2002 American Association of Physics Teachers. [References: 9]
机译:我们提出了一个产生负延迟的简单电子电路。当脉冲作为输入发送到电路时,输出是具有类似波形的脉冲,该脉冲会随时间向前移动。提前时间或负延迟可以增加到几秒钟,以便我们可以通过观察连接到输入和输出的两个发光二极管来肉眼观察提前。电子电路中的负群延迟与超光速传播具有相同的机制,其中群速度超过光速甚至变为负。 (C)2002年美国物理教师协会。 [参考:9]

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