design software for active filter

dick van nierop · 10th March 2006, 12:48 PM

Hi,

I'm looking for design software, preferably freeware.
I know the transferfunction already as I have designed a passive filter for my 2 way speaker. It more or less amounts to LR4 at 3 kHz but has a peak in the LF part.

Now I want the same in an active form, to be build with opamps (and a opamp powerstage, e.g. gainclone).

Any suggestions?
Thanks,
SWdick.

Elso Kwak · 10th March 2006, 12:50 PM

Filter-pro from Burr-Brown, now TI

dick van nierop · 10th March 2006, 08:03 PM

Thanks, Elso.

Nice picture.

Elso Kwak · 10th March 2006, 08:09 PM

Quote:

Originally posted by dick van nierop
Thanks, Elso.

Nice picture.

URVW Dick!
The DOS version worked better for me.
I can send it to you if you like.

BTW the picture is not me me! I am fat and ugly, hahahahaha

dick van nierop · 11th March 2006, 07:15 PM

Hi Elso,

I downloaded the programm. It works well but can only do LF and HF filters. What about e.g. LT, baffle step, etc.?
Any other programms available?

Anyone experience with more complicated topologies in order to minimize the number of opamps?
For a full filter I would need about 20 opamps. Seems a bit much, doesn't it? I don't think this will contribute to the overall quality.

Thanks,
SWDick.

Elso Kwak · 11th March 2006, 07:24 PM

There was a thread in the past about this subject Dick. Do a search; others came with more suggestions.

dick van nierop · 17th March 2006, 07:21 PM

Found a useful tool: 5Spice. Very easy.
I gather I can use it non commercially for free.

No optimalisation though.

Dick

theChris · 20th March 2006, 04:25 PM

nuhertz has filter free (and pro) online. good stuff.

10th March 2006, 12:48 PM	#1
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	design software for active filter Hi, I'm looking for design software, preferably freeware. I know the transferfunction already as I have designed a passive filter for my 2 way speaker. It more or less amounts to LR4 at 3 kHz but has a peak in the LF part. Now I want the same in an active form, to be build with opamps (and a opamp powerstage, e.g. gainclone). Any suggestions? Thanks, SWdick.

11th March 2006, 07:24 PM	#6
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	s/w There was a thread in the past about this subject Dick. Do a search; others came with more suggestions.

20th March 2006, 04:25 PM	#8
theChris diyAudio Member Join Date: Dec 2001 Location: SIUE, Illinois, USA	nuhertz has filter free (and pro) online. good stuff. __________________ if only it could be used for good, not evil...

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10th March 2006, 12:50 PM	#2
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	Filter-pro from Burr-Brown, now TI

10th March 2006, 08:03 PM	#3
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	Thanks, Elso. Nice picture.

11th March 2006, 07:15 PM	#5
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	Hi Elso, I downloaded the programm. It works well but can only do LF and HF filters. What about e.g. LT, baffle step, etc.? Any other programms available? Anyone experience with more complicated topologies in order to minimize the number of opamps? For a full filter I would need about 20 opamps. Seems a bit much, doesn't it? I don't think this will contribute to the overall quality. Thanks, SWDick.

17th March 2006, 07:21 PM	#7
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	Found a useful tool: 5Spice. Very easy. I gather I can use it non commercially for free. No optimalisation though. Dick

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