On Thu, 7 Jan 1999, Dwayne Reid wrote:

> Finally, there are a couple of people making high side current sensors with
> the shunt integrated right in the package.  These work in a fashion similar
> to Phil's suggestion.  Again, depends on the voltage on that rail.  I've
> seen at least 2 different approaches but don't have the names of the
> manufacturers handy right now.  I can look them up if needed.

For example, check out:

http://www.national.com/pf/LM/LM3812.html

These current sense IC's have a 4 milliohm shunt resistor integrated in
the package. The output is a PWM signal. I've never used them, but they
look neat.

Scott