[sdiy] Inverting an envelope?

[Tom Wiltshire]

+1 for the inverting op-amp.

Neil's diagram is nice because:

1) It's got a bipolar attenuator too
2) It includes the other op-amp bleurg that you need, like caps for stability and power supply
3) It's got a 741 in it! Awww!

T.

On 22 May 2011, at 09:02, Neil Johnson wrote:

> Paul Maddox wrote:
>> As Veronica Said, opamp with gain of -1.
> 
> Like this:
> 
> http://www.milton.arachsys.com/nj71/img/Jen/SX1000/sch/vcf_envinv.gif
> 
> Neil
> -- 
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> Homepage -- www.njohnson.co.uk
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