论文部分内容阅读
稳压器和很多闭环自稳定系统一样,反馈放大器的放大量越大,电压稳定性越好.在电子管稳压器中,早有用局部正反馈来提高放大器的放大量的,效果不错.下面介绍将正反馈用于晶体管稳压器. 一、原理分析正反馈稳压器试验电路如图1.BG_1和BG_2原是一级差分放大.如R_f=0,就是一个普通的稳压器.BG_1到BG_2是射极耦合,BG_2的集电极输出又分压馈
Regulators And many closed-loop since the stability of the same system, the larger the feedback amplifier amplification, the voltage stability is better in the tube regulator, local positive feedback has long been used to improve the amplification of the amplifier, the effect is good. The positive feedback for the transistor regulator. First, the principle of positive feedback regulator test circuit shown in Figure 1. BG_1 and BG_2 is a differential amplifier first. If R_f = 0, is a normal voltage regulator .BG_1 to BG_2 is the emitter coupling, BG_2 collector output and partial pressure feedback