Re: Final final 1kHz oscillator

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
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SYMATTR InstName L11
SYMATTR Value 14µ
SYMATTR SpiceLine Ipk=3 Rser=0.0122 Rpar=870 Cpar=1000f mfg="Würth Elektronik" pn="7427503 WE-UKW 40060"
SYMBOL FerriteBead -1760 -1600 R0
SYMATTR InstName L12
SYMATTR Value 14µ
SYMATTR SpiceLine Ipk=3 Rser=0.0122 Rpar=870 Cpar=1000f mfg="Würth Elektronik" pn="7427503 WE-UKW 40060"
SYMBOL res -1200 -1664 R0
WINDOW 0 41 37 Left 2
WINDOW 3 36 71 Left 2
SYMATTR InstName R7
SYMATTR Value 390
SYMATTR SpiceLine tol=0.1
SYMBOL cap -64 -1824 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C9
SYMATTR Value 10p
SYMBOL FerriteBead 576 -1936 R0
SYMATTR InstName L13
SYMATTR Value 1000n
SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
SYMBOL res -944 -1728 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 82
SYMATTR SpiceLine tol=1
SYMBOL res 1120 -1792 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 51k
SYMBOL cap 1184 -1728 R0
SYMATTR InstName C12
SYMATTR Value 15n
SYMBOL FerriteBead 496 -816 R90
WINDOW 0 -16 0 VBottom 2
SYMATTR InstName L14
SYMATTR Value 1000n
SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
SYMBOL cap 704 -1088 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C13
SYMATTR Value 10p
TEXT -1424 -776 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO = 1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n.ENDS
TEXT -336 -528 Left 2 ;R2 a,b,c, Vishay Beschlag  ACAS06S0830372P1AT precision 10k resistor array \n R1a, R1b Maxim  MAX5492LB10000+T  10K resistive divider in a  SOT-23-5 package
TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1 KF=1e-18 AF=1 FC=0.5 mfg=Motorola
TEXT -720 -408 Left 2 !.lib LME49710.lib
TEXT -2000 -392 Left 2 !.tran 0 10s 0s startup
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Bill Sloman, Sydney