Author Topic: Function-to-circuit interpreter?  (Read 6819 times)

earthtonesaudio

Function-to-circuit interpreter?
« on: August 21, 2013, 08:26:16 PM »
I had an interesting thought today: what if there was a program that let you put in functions (e.g. an analog low pass filter (-3dB @ 500Hz, 1st order)) and would spit out a schematic with that transfer function?

I know there are tons of programs which let you put in schematics and output transfer functions and graphs, but are there any examples of the inverse?

If it doesn't exist I'm thinking it would be a fun project to try and tackle.

slacker

Re: Re: Function-to-circuit interpreter?
« Reply #1 on: August 22, 2013, 03:23:34 AM »
Someone recently posted a link to a website that does this for filters, you put in the type and frequency and various other parameters and it generated opamp based schematics. I'll see if I can find the post.

g_u_e_s_t

Re: Function-to-circuit interpreter?
« Reply #2 on: August 22, 2013, 06:33:25 AM »
analog devices used to have an awesome filter designer.  it went down a few years ago, and just came back.  its not as good as it used to be, but still useful.  there are also ones you can download from TI, LinearTech, Maxim and others.

http://www.analog.com/designtools/en/filterwizard/#/type

the one advantage to the new analog devices website, is that it shows you the error due to component tolerances.

cloudscapes

Re: Re: Function-to-circuit interpreter?
« Reply #3 on: August 23, 2013, 08:25:08 PM »
Someone recently posted a link to a website that does this for filters, you put in the type and frequency and various other parameters and it generated opamp based schematics. I'll see if I can find the post.

filterlab

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en010007&redirects=filterlab

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Digital Larry

Re: Function-to-circuit interpreter?
« Reply #4 on: August 24, 2013, 10:51:39 AM »
In the DSP world you can directly create a filter with a specific frequency response or impulse response function.  No soldering required!

What I'd like to see is something that would synthesize a Fender tone stack.  These low pass filter designers won't get you there.
Digital Larry
DSP tinkerer and former transistor twister

earthtonesaudio

Re: Function-to-circuit interpreter?
« Reply #5 on: August 24, 2013, 03:55:14 PM »
Interesting stuff!  I know I mentioned filters in the OP, but are there also tools for circuits that aren't filters?

slacker

Re: Function-to-circuit interpreter?
« Reply #6 on: August 26, 2013, 07:06:23 AM »
That Filterlab looks cool, it was the analog devices one I had seen recently.

Seljer


Digital Larry

Digital Larry
DSP tinkerer and former transistor twister

earthtonesaudio

Re: Function-to-circuit interpreter?
« Reply #9 on: August 29, 2013, 08:01:51 AM »
Quite!  Thanks Seljer.

Digital Larry

Re: Function-to-circuit interpreter?
« Reply #10 on: August 29, 2013, 09:34:24 AM »
I thought about it all day yesterday and even told my boss about it.  What I love the most is the concept of "mojo" FPGAs.  OMG!
Digital Larry
DSP tinkerer and former transistor twister