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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: Final final 1kHz oscillator
Date: Tue, 26 Nov 2024 15:32:38 +1100
Organization: A noiseless patient Spider
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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:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> "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:

<snip>

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

Version 4
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