From Phase conditions, to constitute an oscillator, to be met : (a) very connected to the two reactor X1, X2 the same nature. (2) X1 and X2, X3 nature of the resistance -- contrary.

• 从相位条件看，要构成振荡器，必须满足： (1)极相连的两个电抗X1、X2性质相同。(2)X1与X2、X3的电抗性质相反。