[sdiy] Bending a Sum

[Tom Bugs]

Just wondered if anyone may have a brainwave on this little problem...

It is around the area of linearizing the response of an SSM2164 - but, 
at the moment (blah blah) I wanted to see if I can achieve a rough 
linearization WITHOUT using the well documented Irwin EDM technique.

http://bugbrand.co.uk/images/SumBend.jpg

I just have a simple opamp sum stage to generate 5V to 0V from a 0V to 
10V control - that's the green line.
The standard linearization technique achieves the blue line.
How could I bend green to blue without too much extra complexity and, 
crucially, without using another 2164 cell?

Thanks!Tom

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