Re: Random thoughts on sinewave oscillators

On Fri, 18 Oct 2024 11:25:19 -0400, Edward Rawde wrote:

"piglet" <erichpwagner@hotmail.com> wrote in message
news:vetde5$38sbk$1@dont-email.me...

Edward Rawde <invalid@invalid.invalid> wrote:

>
The circuit below produces a reasonable looking sinewave but the rise
time still seems to be slower than the fall time. It may be that the
amplifier in use is not ideal for this.
>
>

Could that just be second harmonic distortion? You could test the
amplifier by uncoupling the Wien network and injecting test inputs.
>
Elsewhere I think your amplitude control problems could be simply due
to too much gain.

 
Perhaps, but I've not so far been able to get the circuit I posted in
response to Bill to produce a sine wave no matter what I do with the
control loop gain.
It either grows to clipping or dies.

That's the main purpose behind having a thermistor or filament bulb in the
f/b path.