[sdiy] Simulator for The Oscilloscope Artist

Werner Flügel werner.fluegel at b-tu.de
Mon Aug 9 08:05:21 CEST 2021


Am 09.08.2021 um 02:57 schrieb Terry Bowman via Synth-diy:
> For years I've wanted to probe deeper into the workings of The Oscilloscope
> Artist...
> 
> Blog post with pdf download here:
> https://www.astarcloseup.com/2016/02/the-oscilloscope-artist.html
> 
> 
> Half of the circuit is four classic Schmitt Trigger/Integrator LFOs and that
> part I understand. It's the second part, particularly the phase shifting, that
> I'd like to understand better.
> 
> I'm not familiar with any circuit simulators although I've read about most of
> them. What do you suggest? I'm in the Mac universe.
> 
> It would be nice to have a model of the LFO to start with. Thanks in advance!

Hello,

I attached a LFO simulation I made years ago for a phaser. The circuit 
is quite the same as in the oscilloscope artist, you can adapt the Rs 
and Cs as in your schematic. Works with LTSpice, MAC-version is here:

<https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html>

-- 
mfG.

W.Flügel

Wir sind IT. Das ist kein Beruf, das ist eine Diagnose.
<7123838.uCcSxbalbl at rotfl.franken.de>

-------------- next part --------------
Version 4
SHEET 1 1656 680
WIRE 32 -112 -32 -112
WIRE 528 -112 112 -112
WIRE -160 -80 -304 -80
WIRE -304 -32 -304 -80
WIRE -32 16 -32 -112
WIRE 16 16 -32 16
WIRE 128 16 80 16
WIRE 448 16 416 16
WIRE 528 16 528 -112
WIRE 576 16 528 16
WIRE -160 64 -160 -80
WIRE 48 64 -160 64
WIRE 496 64 48 64
WIRE 48 96 48 64
WIRE 496 96 496 64
WIRE -32 112 -32 16
WIRE 16 112 -32 112
WIRE 464 112 448 112
WIRE -304 128 -304 48
WIRE -176 128 -304 128
WIRE 128 128 128 16
WIRE 128 128 80 128
WIRE 144 128 128 128
WIRE 256 128 224 128
WIRE 304 128 256 128
WIRE 416 128 416 16
WIRE 416 128 384 128
WIRE 576 128 576 16
WIRE 576 128 528 128
WIRE 16 144 -32 144
WIRE 416 144 416 128
WIRE 464 144 416 144
WIRE -176 176 -176 128
WIRE 48 208 48 160
WIRE 48 208 -160 208
WIRE 496 208 496 160
WIRE 496 208 48 208
WIRE -304 224 -304 128
WIRE 256 224 256 128
WIRE -32 336 -32 144
WIRE 256 336 256 304
WIRE 448 336 448 112
WIRE -304 368 -304 304
WIRE -160 368 -160 208
WIRE -160 368 -304 368
WIRE 128 400 128 128
WIRE 672 400 672 112
WIRE 672 400 128 400
FLAG -32 336 0
FLAG 448 336 0
FLAG 672 112 Out1
IOPIN 672 112 Out
FLAG -176 176 0
FLAG 256 336 0
SYMBOL res 544 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 150k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 128 -128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage -304 -48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -304 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL Opamps\\LT1013 48 64 R0
SYMATTR InstName U3
SYMBOL Opamps\\LT1013 496 64 R0
SYMATTR InstName U4
SYMBOL res 400 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap 80 0 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 47n
SYMBOL res 240 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 82k
SYMBOL res 272 320 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 24k
TEXT -72 488 Left 2 !.tran 0 .2 0 1u


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