[sdiy] current conveyor?

[ASSI]

On Saturday 11 February 2012, 10:44:07, David G Dixon wrote:
> I'm still very much
> interested in this problem generally, since the requirement to terminate
> 2164 to virtual ground can be a nuisance in many applications.

You will still need to run it into a virtual ground, but the signal for the 
current sense amplifier can directly be taken from the feedback resistor of 
that opamp.  The sad reality is that CoolAudio simply copied the 2164 and 
its datasheet instead of thinking and adding two current mirrors to the 
output (and allowing to take that base resistor out of the loop).

> Can you suggest a specific IC so I can have a look at the datasheet?

MAX9934 for instance, but you'll find many more (LT1787, ZXCT1010, INA193).  
Since they aren't directly made for this application, these will require 
varying support from additional circuitry depending on what exactly you want 
to do.

http://www.maxim-ic.com/app-notes/index.mvp/id/746
http://cds.linear.com/docs/Application%20Note/an105.pdf
http://www.diodes.com/zetex/_pdfs/3.0/appnotes/apps/an39.pdf
http://www.ti.com/lit/an/slyt311/slyt311.pdf


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

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