振荡器中常常采用阴极/发射极输出器作为放大器,其放大系数小于1,而要求阻容反馈网路具有电压增益并且相移为零.这种电路能够满足奈奎斯特准则而产生振荡.图1给出一种这样的电路.进一步考查,很显然,图1的电路不必改变任何网路的接线就可以改画为人所共知,的移相振荡器,示于图2.因此,图2的移相网 Cathode / emitter followers are often used as amplifiers in oscillators with amplification factors less than 1, whereas RC networks with voltage gain and phase shift of zero are required to satisfy the Nyquist criteria for oscillation. One such circuit is shown in Figure 1. Looking further, it is clear that the circuit of Figure 1 can be redrawn to the well-known phase shift oscillator without changing the wiring of any network, as shown in Figure 2. Therefore, 2 phase shift network