>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>On Behalf Of David VanHorn
>Sent: 05 March 2007 22:30
>To: Microcontroller discussion list - Public.
>Subject: Re: [PIC] Measuring negative Voltages
>
>
>Would it be silly of me to suggest a current mirror?
>A pair of transistors, and a couple resistors.
>-- 

Simple current mirrors tend to have fairly crummy performance over temperature etc. but it might be good enough.  We have used the Philips BCV61 and BCV62 (NPN and PNP) dual transistors for high side current measurement with "good enough" results.

Regards

Mike

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