[sdiy] Adapting exponential convertor for single supply

[Oren Leavitt]

I would go with the midpoint derived "ground". It seems to me that would 
guarantee proper current sourced into the control pin of the LM13600

- O


On 7/26/17 5:31 PM, Tom Wiltshire wrote:
> Hi All,
>
> What’s the simplest way to adapt this exponential convertor for a single supply (0-9V)?
>
> http://imgur.com/ZhixiC7
>
> Could I use a simple midpoint bias to act as the ground and expect it to work? It feels wrong, although I don’t know why.
> Bumping the “grounds” up to a useful level with diodes feels better somehow, more like is done in this schematic:
>
> https://hackadaycom.files.wordpress.com/2015/09/two_transistors_expo-sch.png
>
> What would you recommend?
>
> Thanks,
> Tom
>
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>         Electric Druid
> Synth & Stompbox DIY
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>
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