From: Sar Saloth (sarsaloth_at_yahoo.com)
Date: 2002-03-08 16:56:51
I uploaded a suggested change.
It adds 3 passives (the values are just crude guesses, it should be tuned
by hand). If the parts are not needed at all, just putting jumpers in
brings it back to the original circuit.
This circuit I have used before. The source resistance should be pretty
low, depending on the opamp. The feedback components should be just slow
enough to give stability. For load at those frequencies and above, the
regulation has to come from the 47uF source capacitor.
For the LT1114, the source series resistor could probably be 20ohms or
less, I couldn't find any Cload tolerance info on the LT1114 data sheet
except that at 10nF (much less that 47uF) overshoot would be quite
significant.
Was there a special reason for using the LT1114?
At 04:35 PM 2002-03-08 +0000, you wrote:
>Hello,
>
>This email message is a notification to let you know that
>a file has been uploaded to the Files area of the buildcheapeeg
>group.
>
> File : /virtualground.pdf
> Uploaded by : sarsaloth <sarsaloth_at_yahoo.com>
> Description : Suggestion for a modification to virtual ground
>
>You can access this file at the URL
>
>http://groups.yahoo.com/group/buildcheapeeg/files/virtualground.pdf
>
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>Regards,
>
>sarsaloth <sarsaloth_at_yahoo.com>
>
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This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:40 BST