Re: Summing integrator circuit?

From: Active8 (reply2group_at_ndbbm.net)
Date: 03/12/05 

Date: Sat, 12 Mar 2005 13:59:29 -0500

On Fri, 11 Mar 2005 16:18:17 -0800, Larry Brasfield wrote:

<snip>
>
> Use the above gain formula, picking a common
> C value (since there is but one feedback C) and
> weight your R values according to the relative
> gains need for each input.

Yeah, with one additional consideration - the application. Going too
far with the RC time constants (or range thereof) might cause a
prob. The 1/(2.pi.R.C) cutoff freq and the input signal need to be
taken into consideration. IOW, it won't be an integrator if the
signal freq falls within the passband of the corresponding low-pass
filter.

In case the OP hasn't done so:

National Semiconductor AN-31 might help a bit.

I don't know where I got it, but it looks like a lecture note from

Electronics II Theory. It's BASICOPA.pdf -- It's got a few things on
integrators. Try google. 

-- 
Best Regards,
Mike
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