Re: Current source design (tricky?)

From: Ken Smith (kensmith_at_green.rahul.net)
Date: 03/13/05 

Date: Sun, 13 Mar 2005 01:10:24 +0000 (UTC)

In article <eCJYd.335$_7.638@news.uswest.net>,
Larry Brasfield <donotspam_larry_brasfield@hotmail.com> wrote:
[...]
>It would be quite a trick to avoid the offset
>shift when the effective input pair changes.

With laser trimming, it can be reduced to the level of the CMRR. At that
point, it stops mattering that it is caused by the R-R nature of the part.

I think the circuit could be done just as well with the LM301 op-amp
assuming you pull the output up. If you compensate them, they can handle
driving capacitive loads. 

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