Re: Final final 1kHz oscillator

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vh72bm$3b6ip$1@dont-email.me...

On 15/11/2024 3:14 am, Edward Rawde wrote:

"JM" <sunaecoNoChoppedPork@gmail.com> wrote in message news:t5fajjdteskfftvkf84iqsp2vc4b9ta5kj@4ax.com...

On Fri, 8 Nov 2024 15:43:41 -0500, "Edward Rawde"
<invalid@invalid.invalid> wrote:

>
I finally got around to digging out my AD734 based Wein bridge simulation, and created a FET based version.
>
It's got a nasty 163kHz generator embedded in it somewhere, and I've put in an RL filter to keep that under control.
>
The double Sallen and Keys network is a four pole Bessel filter which I'm using as a 250usec delay line - the output from the full
wave rectifier has an appreciable 2kHz component, but the delayed contribution coming into the integrator through R9 roughly
cancels the direct input through R20.
>
R10 in the integrator damps the amplitude feedback loop for a dead-beat response.
>
The harmonics in the 1kHz output are about 100dB below the fundamental. Not great, but respectable, and not worth trying to
improve in a simulation.
>
The circuit still works with the worst case values for the 1% capacitors at C5 and C6.
>

After fixing line wraps and the position of U1 I need LME49710.lib

I'll be back in a few days.