Sine wave oscillation circuit diagram: 
The figure below is an RC sine wave circuit diagram: 
Two: RC sine wave oscillation circuit The common RC sine wave oscillation circuit is an RC series-parallel sine wave oscillation circuit, which is also called a Wen's bridge sine wave oscillation circuit. 
The series-parallel network is used here as a frequency selective and feedback network. Its circuit diagram is shown in Figure (1):
Its starting condition is: 
. Its oscillation frequency is: 
It is mainly used for low frequency oscillations. In order to generate a higher frequency sinusoidal signal, an LC sine wave oscillating circuit is generally used. Its oscillation frequency is: 
. The characteristic of the quartz oscillator is that its oscillation frequency is particularly stable, and it is often used in applications where the oscillation frequency is highly stable.
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