Filter pole question

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urbanscallywag
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Post by urbanscallywag » Thu Jun 26, 2008 12:32 am

Bitexion wrote:You can read lots about the filter theory, why 1 pole equals 3dB and rolloff curves around the net.
Errmm 1 pole is -6dB per octave...

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Bitexion
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Post by Bitexion » Thu Jun 26, 2008 12:37 am

Yes of course, dunno where my head was :P

GeneralBigbag
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Post by GeneralBigbag » Thu Jun 26, 2008 2:36 am

Analog Freak wrote: You're somewhat on the right track, however, your equation is in the z domain which is for discreet time systems and we're discussing analog systems. You need to be in the s-domain young grasshoppa'. :)
You engineers and your crazy s-domain. Isn't the complex plane good enough for you?
I should say, I've never done EE - the only reason I ever really connected the two is because the nomenclature of control theory is somewhere halfway between its engineering origins and a proper mathematical lingo :)
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Analog Freak
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Post by Analog Freak » Thu Jun 26, 2008 4:08 am

I agree that the s domain is crazy, but I'm not in charge of what the engineering profession decides is the right method to use. I just have to learn enough of it to get my degree and get out of college. One more year...
"All Your Synthesizers Are Belong To Us!" Literally.

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urbanscallywag
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Post by urbanscallywag » Thu Jun 26, 2008 5:46 am

GeneralBigbag wrote:
Analog Freak wrote: You're somewhat on the right track, however, your equation is in the z domain which is for discreet time systems and we're discussing analog systems. You need to be in the s-domain young grasshoppa'. :)
You engineers and your crazy s-domain. Isn't the complex plane good enough for you?
I should say, I've never done EE - the only reason I ever really connected the two is because the nomenclature of control theory is somewhere halfway between its engineering origins and a proper mathematical lingo :)
Isn't the s-domain the same as the complex plane?

GeneralBigbag
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Post by GeneralBigbag » Thu Jun 26, 2008 6:07 am

Then why can't I use a z if I want, or are you doing a Laplace transform into the bargain?
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