基于Q点下调整的放大电路工作环境对放大倍数的影响分析

Analysis of Influence of Working Environment of Amplification Circuit Based on Q-point Adjustment on Magnification Factor

阐述以更具实用性的分压式偏置放大电路为例,搭建基本电路,依据静、动态分析机理,测量并分析静态工作点和动态电压放大倍数。通过实验和理论数据分析看出,静态工作点的高低会影响放大电路的动态范围。在放大电路稳定输出条件下,通过改变电路工作环境,可以找到符合分压式偏置放大电路的最佳放大倍数。

This paper describes that the more practical partial voltage bias amplifier circuit is taken as an example,the basic circuit is built,and the static operating point and dynamic voltage amplification are measured and analyzed according to the static and dynamic analysis mechanism.Through the analysis of experimental and theoretical data,it can be seen that the static operating point will affect the dynamic range of the amplifier circuit.Under the condition of stable output of the amplifying circuit,the best magnification ratio conforming to the partial voltage bias amplifying circuit is found by changing the working environment of the circuit.