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分析了用运算放大器组成正弦波振荡电路的起振条件和输出电压幅值的调节及选频网络的构成。
This paper is involved in the analysis of oscillation starting condition, output voltage amplitude adjustment, and frequency selection network composition of sinusoidal coave oscillation circuit.
在各种振动情况中，尤以风雨激振的起振条件容易满足，且振幅极大，对桥梁的危害最为严重。
The tangential movement of water rivulet has significant effects on the rain-wind induced vibration of stay-cables.
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