On Wed, Nov 05, 2003 at 09:44:19AM -0800, ali marjovi enlightened us thusly
> Dear List
> I want to make an IO device with a few analog outputs
> each one driving about 40 mA while short circuit
> protection is necessary.(at least when short to Gnd )
>
> Can any one suggest an opamp or a method?
> Thanks
> Ali
Right - I'll have a go.
If you start with an opamp o/p, there are power opamps with all you
require. Presuming these are unsatiisfactory, and you have a good
voltage overhead (I.E. your supplies are high and you don't require all
the voltage swing available) you can make a supertransistor
construcytion in class B to pull up and down. The crossover is fairly
seamless, but not entirely.
Nobody is going to think about this until we have a lot more detail. How
precise? How big? What supplies in? etc.
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
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