[sdiy] Question about my high freq compensation

[Grant Richter]

on 12/10/03 2:00 PM, Grant Richter at grichter at asapnet.net wrote:

> on 12/10/03 1:29 PM, Grant Richter at grichter at asapnet.net wrote:
> 
>> on 12/10/03 9:25 AM, René Schmitz at uzs159 at uni-bonn.de wrote:
>> 
>>> Hi Ray, Ian and all,
>>> 
>>> The Rbe compensation circuit is here:
>>> 
>>> http://www.uni-bonn.de/~uzs159/rbecomp.gif
>>> 
>>> Cheers,
>>> René
>>> 
>>> 
>>> 
>> Would you would be kind enough to explain the improvement over the Rossum
>> implementation?
>> 
>> I'm sure there is a reason for the increased parts count.
>> 
>> 
>> 
> To answer my own question. I think you can now use it with PNP tannies. I've
> attached a drawing. You would have to invert the input drive for PNP I
> think?
> 
> Thanks Rene'
> 
> 
Just off the top of my head. For PNP base goes negative for increased
current. Compensation goes positive, so compensation voltage should loop
back to summing node of input summer rather than base of transistor.

I THINK it will work????

A brainstorm just gives you water on the brain ;^)

Thanks again Rene'