On 20 Sep 2006 01:02:36 -0700, "Rune Allnor" <allnor@tele.ntnu.no>
wrote:
>
>Greg Berchin skrev:
>> On Mon, 18 Sep 2006 14:21:41 GMT, Peterpan <xxxx@uun.com> wrote:
>>
>> >Any techniques for obtaining a 'best fit' digital filter ... for an
>> >analog filter.
>>
>> http://groups.google.com/group/comp.dsp/browse_thread/thread/501b31898ae74f47/79dfa6d61e95c6b7
>>
>> Greg Berchin
>
>Greg,
>
>Thanks for pointing out a very interesting thread that slipped past me
>at the time. Too bad your first attempts at publishing this method
>did not come through; some times one wonders what's on the minds
>of journal editors... oh well.
>
>How is that SPM article coming? It would be a very interesting one,
>for sure.
>
>Rune
Hi Rune (& Greg),
to elaborate a little on Greg's phrase "an upcoming
episode of "Tips & Tricks", Greg's article will appear
in the 'DSP Tips & Tricks' column of January 2007 issue
of the IEEE Signal Processing magazine.
See Ya',
[-Rick-]
Reply by Greg Berchin●September 20, 20062006-09-20
On 20 Sep 2006 01:02:36 -0700, "Rune Allnor" <allnor@tele.ntnu.no>
wrote:
>How is that SPM article coming? It would be a very interesting one,
>for sure.
The article is complete, and will be the subject of an upcoming episode
of "Tips & Tricks".
I have Matlab code that implements the algorithm. Anybody may email me
privately for a copy. (Remove the "w" from my email address.)
Greg
Greg,
Thanks for pointing out a very interesting thread that slipped past me
at the time. Too bad your first attempts at publishing this method
did not come through; some times one wonders what's on the minds
of journal editors... oh well.
How is that SPM article coming? It would be a very interesting one,
for sure.
Rune
Reply by Symon●September 19, 20062006-09-19
"Peterpan" <xxxx@uun.com> wrote in message
news:Xns9842551001B93dnyarkoinamecom@140.99.99.130...
> Any techniques for obtaining a 'best fit' digital filter (1st choice FIR,
> 2nd choice IIR) for an analog filter. The analog filter specifications be
> from an equation (e.g. butterworth etc) or a set of measured frequency
> response values.
> This will allow me to simulate digitally an analog process.
Google Parks McClellan
HTH, Syms.
Reply by Greg Berchin●September 18, 20062006-09-18
On Mon, 18 Sep 2006 14:21:41 GMT, Peterpan <xxxx@uun.com> wrote:
>Any techniques for obtaining a 'best fit' digital filter ... for an
>analog filter.
Reply by Vladimir Vassilevsky●September 18, 20062006-09-18
Peterpan wrote:
> Any techniques for obtaining a 'best fit' digital filter (1st choice FIR,
> 2nd choice IIR) for an analog filter. The analog filter specifications be
> from an equation (e.g. butterworth etc) or a set of measured frequency
> response values.
> This will allow me to simulate digitally an analog process.
P.S. Building the digital filter by the analog prototype and the
simulation of the analog process are the two very different things.
If your goal is a filter, Google "BLT".
If your goal is the simulation, Google "Spice".
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Reply by Vladimir Vassilevsky●September 18, 20062006-09-18
Peterpan wrote:
> Any techniques for obtaining a 'best fit' digital filter (1st choice FIR,
> 2nd choice IIR) for an analog filter. The analog filter specifications be
> from an equation (e.g. butterworth etc) or a set of measured frequency
> response values.
> This will allow me to simulate digitally an analog process.
The most straightforward ways are the BLT and the impulse invariant
design. Just make sure the sample rate is at least 4 times higher then
the highest frequency of interest. If it is not, close matching of the
analog prototype becomes a really complicated task.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Reply by Peterpan●September 18, 20062006-09-18
Any techniques for obtaining a 'best fit' digital filter (1st choice FIR,
2nd choice IIR) for an analog filter. The analog filter specifications be
from an equation (e.g. butterworth etc) or a set of measured frequency
response values.
This will allow me to simulate digitally an analog process.