Re: Final final 1kHz oscillator

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vi3j1k$3aiv6$1@dont-email.me...

On 25/11/2024 1:02 pm, Bill Sloman wrote:

On 24/11/2024 5:10 pm, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vhue9h$243sl$1@dont-email.me...

On 24/11/2024 5:11 am, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vhs1ea$1kbt4$1@dont-email.me...

On 23/11/2024 4:12 pm, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vhrma8$1io30$2@dont-email.me...

On 23/11/2024 3:32 am, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vhp713$12bnt$2@dont-email.me...

On 21/11/2024 1:00 am, Bill Sloman wrote:

On 20/11/2024 2:03 pm, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vhjj2v$24eu4$3@dont-email.me...

On 20/11/2024 1:29 pm, Bill Sloman wrote:

On 20/11/2024 12:59 pm, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vhibce$1t7v2$1@dont-email.me...

On 18/11/2024 2:58 pm, Edward Rawde wrote:

"JM" <sunaecoNoChoppedPork@gmail.com> wrote in message news:n7iijjdeqecl0kmub0bq5in0dbm60m7qam@4ax.com...

On Thu, 14 Nov 2024 11:14:28 -0500, "Edward Rawde"
<invalid@invalid.invalid> wrote:
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"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:

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<snip>
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The current version has been running overnight and has got to three seconds, and the DFT from 2.8 to three seconds shows third
harmonic about 90db below the fundamental. The noise floor is about 100dB down and the other harmonics are barely visible above
it.
>
Here's the .asc file. There are extra components put in to make it simulate faster - L1 and L14 are the obvious examples, but L10,
L11 and L12 got put in for the same reason. I suspect that if I had put in equivalent series resistance and inductance for C22 as
well as for C6 and C15 I might not have needed some of them.
>
There is some other tidying up I could do, and that should get get the simulation speed up. I got a new circuit from John May last
night, and it not only spits out a very clean sine wave but also simulated very fast. I forgot to put it on solid state disk
before I ran it, and it took as long to get one of the waveforms off the spinning hard disk as it had done to run the simulation.
>
Ny tidying up is going to wait until I've got ten seconds worth of simulation out of the current circuit, and can look at the
details of what's going on deep in the circuit
>

After running the simulation to 10 seconds I get 80dB down at 3kHz with an FFT on a sample of the last second and a Blackman-Harris
window.
Looks like the noise level either side of 1kHz may be higher than that.