摘要
分析了负反馈放大电路闭环增益的模值和相角，发现闭环增益频率特性曲线高频段的突峰所对应的相角近似为－９０℃。在这个突峰值近似等于这个闭环增益中频段数值的情况下，找到了计算负反馈深度最佳值的方法。
The modulus and phase angle of the close loop gain of the negative feedback in amplifier were comprehensively analysed.It has been discovered that the phase angle Corresponding to the peak in the high frequency range of the close loop gain frequency characteristics is approximately-90°。Under this condition that the peak value is nearly equal to the value of the mid frequency range of the closed loop gain.A methed of calaclation for the optimum value of the negative feedback depth has been found out.
出处
《青岛大学学报（工程技术版）》
CAS
1997年第3期90-92,共3页
Journal of Qingdao University(Engineering & Technology Edition)
关键词
负反馈放大电路
反馈深度
计算
Feedback depth
Tim distortion
Close loop Gain
