From: al davis <ad212@fr...> - 2013-07-02 13:03:44
Ref ... oscillator doesn't oscillate in spice.
You need to kick it to get it started.
The spice initial DC puts it in a metastable state, that exists
in theory but not in practice. A real circuit has noise or a
transient to start it.
To kick it, instead of using a pure DC source for power, start
it at zero then change it to the desired voltage.
This is the most likely reason.
There could also be an issue with the "integration" (which
really means differentiation) method used. You want
method=trap. Not Gear or Euler. Gear and Euler tend to
overdamp, so oscillators don't oscillate.