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Now, where's that attenuverter?
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Uncle Krunkus
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PostPosted: Sun Jul 02, 2006 3:52 am    Post subject: Now, where's that attenuverter? Reply with quote  Mark this post and the followings unread

I saw a schem for an attenuverter a little while back. Not this one: -
http://www.ori.org/~aaronc/synth/Attenuverter_V1.pdf
It was a different schem, of essentially the same idea, just a little more specific. Does anyone else remember where it was?

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mosc
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PostPosted: Sun Jul 02, 2006 8:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Maybe it was in this thread. http://electro-music.com/forum/topic-11431.html
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Uncle Krunkus
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PostPosted: Sun Jul 02, 2006 8:56 am    Post subject: Reply with quote  Mark this post and the followings unread

That's the one!
Thanks Mosc Smile

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PostPosted: Tue Jul 04, 2006 2:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

I built two of those Grenader circuits..what he calls a "voltage processor".

Highly recommended!

Robert
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zipzap



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PostPosted: Wed Jul 05, 2006 1:56 am    Post subject: Reply with quote  Mark this post and the followings unread

I once tried this type of "antenuverter" and wasn´t happy. I had no pots with center snap, so it felt kind of strange to use.
Another thing is that it´s twice as hard to set the pot to a certain value... nobody else bothered by that?
So i have been using swiches next to the pots to choose for inverting/noninverting operation and keep the full pot rotation for better adjusting. I have some push/pull pots that could be useful, but they only have a simple on-off switch. No good way of using those to choose directuon i guess. Push/pulls with two way swich would be perfect.
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Uncle Krunkus
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PostPosted: Wed Jul 05, 2006 2:03 am    Post subject: Reply with quote  Mark this post and the followings unread

You might have a couple of good points there Zipzap.
If you used a simple attenuator made of an op-amp (which I'd need to track down as I have a brain like a seive!) Would the inverter switch swap the inverting input for the non-inverting input in a change over style DPDT setup, or is it simpler than that?

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PostPosted: Wed Jul 05, 2006 2:14 am    Post subject: Reply with quote  Mark this post and the followings unread

i wasn´t sure what thos swiches are called, but changeover is what i mean. Well, i was using an dual opamp. Input is fead to both amps, one is inverting, the othe just an buffer. The swich simply chooses which amp is connected to the output.
Many possible ways to do that though.
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