[sdiy] Output buffer question

[Tom Wiltshire]

Hi All,

I'm working on a glide circuit, and the first attempt used a simple voltage follower as a buffer. This didn't work that well, because the current limiting resistor messes things up (thumbs down).

The second attempt (thumbs up) puts the resistor inside the feedback loop. This works much better - in fact, it works. However, most of the buffers I've seen in this style use a feedback resistor, a stability capacitor, and are inverting. So it's had a few "modifications".

http://www.electricdruid.net/ThumbsUp.GIF

What I'd like to know is whether there are any problems with this. If I can't modify the standard CV output buffer like this, I'd like to learn why not.

Thanks!

Tom