David VanHorn wrote:
> The difference between an op-amp configured to provide a voltage, and
> one configured to provide a current, is one resistor.
> Two LM-12 chips or similar would give you a butt-kickin analog drive
> with about +/- 35V compliance.
> Connect one side of the windings to ground, and drive the other side
> with a voltage to current converter made with the LM-12.
>
> Now you have no chopping products to worry about or get rid of,

But you may have significant heat to get rid of.

******************************************************************
Embed Inc, Littleton Massachusetts, (978) 742-9014.  #1 PIC
consultant in 2004 program year.  http://www.embedinc.com/products
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist