Transfer function in desmos sheet (Hjälp needed)
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- KVRian
- Topic Starter
- 833 posts since 21 Feb, 2006 from FI
Are there desmos sheets with (various) transfer functions available anywhere (web)?
I would like to compare 1st order LPF (based on MZT method) against its analog (A) version. Here's my sheet: https://www.desmos.com/calculator/yzel8sdbq7
and here's the Wiki page for MZT I'm trying to enter: https://en.wikipedia.org/wiki/Matched_Z ... orm_method
Any help is highly appreciated.
I would like to compare 1st order LPF (based on MZT method) against its analog (A) version. Here's my sheet: https://www.desmos.com/calculator/yzel8sdbq7
and here's the Wiki page for MZT I'm trying to enter: https://en.wikipedia.org/wiki/Matched_Z ... orm_method
Any help is highly appreciated.
- KVRAF
- 7890 posts since 12 Feb, 2006 from Helsinki, Finland
Doing this in desmos is rather inconvenient [edit: as in "lots of manual trigonometry"], since you need to evaluate the responses (complex magnitude and phase, depending on which one you want to plot) on the imaginary axis of the s-plane and unit circle of the z-plane and as far as I can tell desmos doesn't know about complex numbers.
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- KVRian
- Topic Starter
- 833 posts since 21 Feb, 2006 from FI
Hi. I didn't find a solution I would have prefered but managed to calculate the value at selected point (as like done for s-plane (value A there in mu desmos sheet)) using common formula based on this thread.
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Music Engineer Music Engineer https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=15959
- KVRAF
- 4289 posts since 8 Mar, 2004 from Berlin, Germany
maybe then geogebra could be used as alternative:
https://www.geogebra.org/graphing?lang=en
disclaimer: i'm not very familiar with it, but entering something like "w = exp(i*pi)" gives you the correct result of -1 + 0i, so at least, it can deal with complex numbers
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- KVRian
- 1273 posts since 9 Jan, 2006
Don't know if it's any use, but you mentioned MZT vs analog 1 pole LPF. Here's how I did it in desmos: https://www.desmos.com/calculator/yjbvjyok02 Did it on my phone, so possibly error prone.
Music Engineer, I'll take a look at geogebra, thanks
Music Engineer, I'll take a look at geogebra, thanks
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- KVRian
- 1273 posts since 9 Jan, 2006
I tried GeoGebra for android. Seems like it could be ideal, but the UI seems to have a mind of its own! Not sure if it's buggy, or user error. I guess I actually have to RTFM to find out which.
Edit: on further use it's definitly capable, but a few annoyances. Deleting a slider deletes all associated functions. Can't seem to rename or reorder functions. Can't get a url to a sheet for convenient sharing. Desmos is definitely nicer to use, shame it can't handle complex numbers.
Edit: on further use it's definitly capable, but a few annoyances. Deleting a slider deletes all associated functions. Can't seem to rename or reorder functions. Can't get a url to a sheet for convenient sharing. Desmos is definitely nicer to use, shame it can't handle complex numbers.