----- Original Message ----- 
From: "Robert McClure" 
To: "psn-l" 
Sent: Wednesday, May 13, 2009 1:44 PM
Subject: Re: Anti-Alize Filter Design Program


> On  Mon, 11 May 2009, Geoffrey wrote:
> I just put together a program to help me design an active anti alize
> Low Pass filter N=8 for whatever values you might want to use.
> 
> Hi Geoff,
> 
>  What is an anti alize filter? Do you mean anti-alias?

Yes, I have seen it spelled both ways.
Where the Americans tend to use Zs
I have seen the brits use Ss
Since Im USA I like to use Zs :-)
Like they say colour when we say color.
And they drive on the wrong side of the road too.
But I must say they are better at technology today
than we are, The american public seems to me hateful of industry in general in favor of farming over industry.
Since i like it the other way around im at odds with
my own peoples. They want anyone working in electronics
today to have a min of 4 years after high school.
This was not true when I was young.
Technology is becoming a class of snobs in the USA today.
This filter goes just before the Buffer amps on the output
feeding the A/D converter but only if the amplifier you are
using does not already have one (lpf). It keeps like in my case
60Hz from looking like 5.3 or 5.4 or something like that.
And also it helps keep out man made artifacts like vehicular
activity which is terrible at my location.


 Is this a
> program for analog filter design? What do you mean by "active"?


Active uses amplifiers in this case OpAmp of your choice.
Passive are like R and C without any amplifiers.
C alone is a reactive component as is L.
I have been taught old school Electronics
like condensor instead of capacitor so my terms
might not be up to date.

> 
> Bob
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