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为了提高放大器的性能,在放大器中经常使用负反馈技术。在某些场合,为了取得振荡信号则需要采用正反馈措施。那么什么叫作“反馈”呢,在日常生活中,我们常常用到“信息反馈”这个词。“馈”是“送”的意思,“反馈”就是“回送”、“回授”之意。在放大器中把输出信号(电压或电流)的一部分通过一定的方式回送到输入端,以减弱或增强输入信号的过程叫作“反馈”。电路中的“反馈”有“正反馈”和“负反馈”之分。如果反送回输入端的信号使放大器的放大倍数增
In order to improve the performance of the amplifier, negative feedback technology is often used in the amplifier. In some cases, in order to obtain the oscillation signal you need to use positive feedback. So what is called “feedback”? In everyday life, we often use the word “feedback”. “Feed” is the meaning of “send”, “feedback” is “send back”, “feedback” meaning. The process of returning a portion of the output signal (voltage or current) back to the input in an amplifier to attenuate or boost the input signal is called “feedback.” Circuit “feedback” has “positive feedback” and “negative feedback” of the points. If the anti-back to the input signal amplification of the amplifier multiplied