负反馈放大器r_(if)、r_(of)完全解析式推导

A Complete Analytic Formula of r_(if)、r_(of) of the Negative-feedback Amplifier

应用电路分析方法、不作近似处理,导出了负反馈电路闭环输入电阻rif和输出电阻rof的完全解析式函数关系式.这种新的关系式中不再含有反馈系数F,基本放大倍数定义的很容易计算,能直观、全面描述电路参数对rif、rof的影响.

A practicable and complete analytic formula of closed-loop input output resistance rif、rof for the negawas given by circuit analytic method. The feedback factor F is not used in calcuting, The open-loop gain is also easy to calculate. The new formula can evidently describe the influence of all circuit parameters to input and output resistances.