从正、负反馈对放大器性能影响出发,分析RC串、并联电路及其对偶电路的频率特性.根据正弦波振荡器的相位、幅度平衡条件,研究RC对偶电路在正弦波振荡电路中作为负反馈网络的可行性,提出了一种高稳定度信号源———对偶式RC桥式正弦波振荡器及实现电路,最后对这种新型信号源频率特性能进行了分析. According to the influence of positive and negative feedback on the performance of the amplifier, the frequency characteristics of the RC series and parallel circuits and their dual circuits are analyzed. According to the phase and amplitude balance conditions of the sine wave oscillator, the RC dual circuit is studied as a negative feedback Network feasibility of a high stability signal source --- dual RC bridge sine wave oscillator and the realization of the circuit, and finally the frequency characteristics of this new signal source can be analyzed.