静态工作点稳定性对射极输出器动态性能的影响  

Influence of Quiescent Point′s Stability on Dynamic Performance of Emitter Follower

作　　者：任骏原[1] 

机构地区：[1]渤海大学,辽宁锦州121000

出　　处：《现代电子技术》2009年第1期76-77,80,共3页Modern Electronics Technique

摘　　要：鉴于电子技术教材的阻容耦合射极输出器都是静态工作点不稳定的电路形式,都没有分析静态工作点的稳定性对电路动态性能影响的问题,因而有射极输出器是否需要稳定的静态工作点的疑点问题。针对疑点问题,研究了射极输出器的电压放大倍数、输入电阻、输出电阻等三大动态性能指标的数值范围及与静态工作点的关系,得出射极输出器静态工作点的稳定性对电路动态性能影响很小、射极输出器的偏置电路可采用简单构成形式的结论。In a variety of electronics textbooks, RC coupling emitter follower adopts the form that quiescent point is not stable. The effect of quiescent point＇s stability on circuit has not been researched. Thus, if emitter follower needs stable quiescent point remains a question. Index of emitter followerrs dynamic performance, such as voltage amplification,input resist- ante,output resistance and its relationship with quiescent point are studied. It＇s found that quiescent point＇s stability has slight effect on dynamic performance. As a consequence,emitter follower bias circuit has a simple structure.

关 键 词：电压放大倍数 输入电阻 输出电阻 静态工作点 

分 类 号：TN701[电子电信—电路与系统]