0 引言在测量技术中,常常采用一种比桥式振荡器更为简单的RC移相式振荡器,如图1所示。但该电路在现在的模拟电子技术类文献中很少出现了,即使出现,也不对其进行详细的讨论,仅给出在特定条件下的结论。由于不同的文献有时会给出不同的结论,例如文献[1]给出电路在R_1=R时的振荡频率ff_0=1/(2πRC (4R_C/R+6))~(1/2);文献[2～3]给出电路在R(?)R_1=R_i时的f_0=1/(2 6~(1/2)πRC),这无疑会给读者的正确理解和使用造成困难。本文根据正弦波发生器的工作原理,对RC移相式振荡器进行了详细的分析,推导出了 0 Introduction In measurement techniques, an RC RC oscillator that is simpler than a bridge oscillator is often used, as shown in Figure 1. However, this circuit is seldom found in the current analog electronic technology literature. Even if it appears, it will not be discussed in detail and only the conclusion under certain conditions will be given. For example, the literature [1] gives the oscillation frequency ff_0 = 1 / (2πRC (4R_C / R + 6)) ~ (1/2) of the circuit at R_1 = R, while the literature can sometimes give different conclusions. [2 ~ 3] gives the circuit f_0 = 1 / (2 6 ~ (1/2) πRC) when R (?) R_1 = R_i, which will undoubtedly cause readers to understand and use difficulties. In this paper, according to the working principle of the sine wave generator, the RC phase-shifted oscillator is analyzed in detail and deduced