【摘要】 在"模拟电子技术"理实一体化的项目驱动式教学中,本文设计了一个基于结型场效应管等效可变电阻控制衰减的AGC放大器,并验证了其性能。首先梳理了现有的AGC放大器设计方法,分析了它们各自的特点,在此基础上提出了基于结型场效应管等效可变电阻,并同时引入串联和并联控制衰减的AGC放大器设计方案。通过理论计算和实际电路测试,验证了该设计方案的合理性及优越性。更多还原

【Abstract】 For the project-oriented teaching of the integration of theory and practice in Analog Electronic Technology, an AGC amplifier based on the equivalent variable resistance of junction field effect transistor is designed and its performance is verified. This paper firstly organizes the existing AGC amplifier design methods, analyzes their respective characteristics. Based on these, it proposes an AGC amplifier design which is based on the equivalent variable resistance of JFET and simultaneously introduces series and parallel attenuation. Then the rationality and superiority of the design scheme are verified by theoretical calculation and actual circuit test results.更多还原