[sdiy] Dynamics in OTA's!

[David G. Dixon]

Yes, the diodes correct the nonlinear response of transconductance to large
differential input voltages.  Of course, any non-linearity associated with
high input voltage will be amplified at high gain...

On Dec 27, 2008, at 4:28 PM, David G. Dixon wrote:

> Basically, transconductance g_m = 19.2*I_abc at 25°C, where I_abc is  
> the
> bias current input, such that I_out = g_m * V_in, where V_in is the
> differential voltage input.  If I'm not mistaken, that's all there  
> is to it!
>
> The absolute maximum bias current is 2 mA, but I think the response  
> gets
> seriously non-linear long before this limit is reached.  The  
> linearizing
> diodes fix this somewhat.


Do the linearizing diodes linearize things re: the voltage input or  
the current control input? I thought it was the former.

- Aaron
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