In this paper, A new method of system main loop analysis is quoted to analyse the behaviour characteristic of feedback amplifier with large signal, A ordinary analysis method and steps are given.

本文引用系统主回路分析的新方法—回路增益弹性法对大信号下反馈放大电路的行为特性进行讨论，并通过分析一个二阶反馈放大电路给出一般分析方法和步骤。

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GTO dc chopper is adopted for the main power supply while the switch mode control with derivative feedback loop is adopted for the main controller.

主电源采用GTO直流斩波器。主控采用带微分反馈环节的开关斩控模式。

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The main form of management control is closed loop (feedback) control, and it has good stability and self - adaptability.

管理控制的主要形式是闭环(反馈式)控制，具有良好的稳定性和自适应性。

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