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字数:10413,页数26 附任务书,开题报告 摘 要 代通信系统和电子设备种，为了提高它们的技术性能指标，或者实现某些特定的要求，广泛地采用各种反馈控制电路。负反馈放大器就是反馈电路典型实例。放大器的输出信号通过负反馈网络反馈到其输入端，与输入信号相减，这时，放大器的净输入信号为原输入信号与反馈信号之差。显然，当输出电压增大，则反馈电压也增大，反馈信号与输入信号相减后，使实际输入信号减小，从而减小了放大器的输出电压，使输出电压幅度保持不变，进而提高了电路的稳定性。
High frequency reaction control electric circuit Abstract: Plant in the Communications Today system and the electronic installation, in order to enhance their technical performance target, or realizes certain specific requests, widely uses each kind of reaction control electric circuit. The negative-feedback amplifier is the feedback circuit typical example.The amplifier output signal feeds back through the negative feedback network to its input end, cancels with the input signal, by now, amplifier net input signal difference of for original input signal and the feedback signal,causes the actual input signal to reduce, thus reduced the amplifier output voltage, causes the output voltage scope maintenance to be invariable, then enhanced the electric circuit stability.
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