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I place a Wien Bridge Oscillator circuit, and it doesn't oscillate. What a wien bridge oscillator does is it amplifies noise, puts amplified noise back in the inverting end of the op-amp, and also uses a lag-lead circuit to select a frequency from the noise and puts that in the non-inverting end of the op-amp. But, when I simulate it, nothing oscillates nor amplifies.

If you would like to publicise your circuit maybe we could offer some suggestions.

In the meantime looking around these may help:

These run but have no amplitude control and no supply rail limits:

whilst:

has amplitude control (takes ages to run)

Suspect you have one or more of:

i) simulation time too short and it's not started oscillating yet;

ii) oscillation not starting and needs a supply or input transient to kick it into life;

iii) your time steps too large (at least 100 times smaller than sim time, preferrably 1k times smaller).

:)

It was (i). Thank for helping me.

Deep joy.

If you search CL tags for 'initial-conditions' and 'oscillator-startup' you'll find several ideas on how to kick circuits into life sooner rather than later.