自激响应和起振条件

Self excitation Response and Start oscillation Condition

本文以ＲＣ桥式振荡器为例，说明不稳定网络自激响应的一般形式为复频率波ｅｘｐ｛σｉ＋ｊωｉ）ｔ｝。正弦振荡和脉冲边沿都是自激复频率波的特定情形。并且说明，正弦振荡器在起振时相位没有平衡；满足相位和幅值平衡条件的网络，有时也不能建立正弦振荡。

Using RC sine oscillator as an example,this paper shows that the general form of self excitation response in unsteady network is complex frequency wave exp{(σ 1+jω 1)}t.Both sine wave and steep pulse edge are special cases of complex frequency wave. It can also be shown that a sine oscillator does not fulfill the phase balance in the initial stage.And some of network which satisfy the phase and amplitude balance do not produce sine oscillation.They produce self excitation reversion instead.