【摘要】 放大电路是模拟电子技术的核心内容，而反馈放大电路是模拟电子技术中分析解算的难点。从双端口网络模型与特性出发，总结了反馈放大电路的基本原理，提出了系统四层次模型表达的概念和电路网络的方向性判断三原理，重新给出了理想运放的判定标准；提出了单闭环系统的分类与三种单闭环反馈系统的分析方法，给出了单闭环反馈电路解算的实例，并给出了内稳闭环系统的概念与稳定性判据，由此构建反馈闭环放大电路的知识体系，以期有效地帮助学生理解和掌握反馈放大电路相关的理论知识。更多还原

【Abstract】 Amplification circuits are the core content of analog electronic technology, and feedback amplification circuits are the difficulty of analysis and calculation in analog electronic technology. Starting from the dual port network model and characteristics, this article systematically analyzes and summarizes the basic principles of feedback amplification circuits, proposes the concept expressed by the system′s four level model and three principles for judging the directionality of circuit networks, redefines the criteria for determining ideal operational amplifiers, proposes the classification of single closed-loop systems and three analysis methods for single closed-loop feedback systems, provides examples of solving single closed-loop feedback circuits, and provides the concept and stability criteria of internally stable closed-loop systems. Based on this, a knowledge system of feedback closed-loop amplification circuits is constructed, which can effectively help students understand and master relevant theoretical knowledge.更多还原