[sdiy] 4049/4069 linear mode

[Derek Holzer]

I've been trying to understand how the 4049 and 4069 inverters work in 
linear mode. Studying the Wasp Filter, Craig Anderton's 4049 distortion 
(http://www.tonepad.com/project.asp?id=65) and the schematics which 
Nicholas Collins included in his circuit-bending book, I'm still not so 
clear on why they work.

First off, are these essentially the same chip (aside from pin outs), or 
does the 4049 give additional gain while the 4069 only reaches unity?

Second, why does this happen? For gain less than unity, I can see that 
adding the inverted signal to the original signal via a feedback 
resistor could create attenuation, but how does this circuit produce 
positive gain??

Thirdly, is the amplified or attenuated signal resulting from using the 
inverter in this way inverted or not?

Sorry if these are super basic questions. I'm coming at this from an 
artist's rather than an engineer's background.

Best!
Derek

-- 
::: derek holzer ::: http://blog.myspace.com/macumbista ::: 
http://www.vimeo.com/macumbista :::
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"Abandon normal instructions"