--- Mauricio Giovagnini <maugiovagnini@yahoo.com.ar> wrote:

> Hi, i don't know if I'm using the right frase in english, but what
> I'm 
> trying to ask is if anyone know a way or an IC that can make a FIX 
> voltage with a variable input.
> 
> It should work like a zener: Over the voltage desired the ouput
> should 
> be FIX, under the voltage desired the FIX VOLTAGE REFERENCE should
> not 
> work (it has to let pass everything).
> 
> So, the problem with using a zener is that I can have from 0Vac to
> 40Vac 
> input so I think a zener is not suitable for me. 
> 
> Im needing an IC to be connected in parallel that could assure that
> the 
> output would be.
> 
> Vinput = 2Vac to 40Vac.   -->  Vout = 2Vdc
> Vinput < 2Vac the Vout should be Vinput
> 
> Any tip?
> 
> Thanks!
> 
Are you looking for a voltage reference? A power supply? No IC can
convert AC voltage into DC voltage cleanly without descret ecomponents.
A zener can be used for a small power supply or a reference (it's a
terrible reference though).  Your output voltage is .. unusual and low
for standard IC's. Likely you will need to resort to a number of
different components to fullfill your requirements.  What are you
attempting to use this for? That might be more helpful to people to
help you :)

Stephen R. Phillips


		
__________________________________ 
Do you Yahoo!? 
The all-new My Yahoo! - Get yours free! 
http://my.yahoo.com 
 

_______________________________________________
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist