The Wien-bridge OSC is as below.
R=1K Ohms, C=1uF, so f=1/(2*pi*R*C)=159Hz. And the BW of the operational amplifier is 9KHz. Theoretically, the OSC outputs a sine wave.
However, the OSC keeps a common voltage, which is another steady state.
Is there something wrong with my simulation setup? Can you help me, please? Thanks a lot.