This approach assume that the input impedance of the sense lines is high
enough such the current returned to the power supply does not affects
the measurement. Is it so ?

Tal

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Peter Schultz
> Sent: Thursday, June 26, 2003 7:45 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE] Measure Current less than 1 mA
>
>
> Without causing to much error because of the sense resistor (
> burden voltage ), use a four wire power supply with the
> resistor in series in the source line and measure the voltage
> on the resistor. You can find lots of good info about that on
> the Keithley website.
>
> Peter Schultz
>
> On Wed, 25 Jun 2003 11:41:12 -0700, Quah wrote:
> >What is the best tools required to measure current less than 1 mA ?
> >
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