In the context of my designs I use SGND (signal Ground) and PGND (power
ground) to diferentiate between the isolated signal ground and the incoming
power ground. Could be something similar on your schematic? If there is no
isolated power source in the schematic, then the two grounds might be tied
at a single point in the PCB to maintain analog and digital ground
integrity.

Madhu
----- Original Message -----
From: "Tal Bejerano - AMC" <kooter@ZAHAV.NET.IL>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, May 24, 2002 10:51 AM
Subject: [EE]: PGND SGND


> lo 2 ol
>
> What is the difference between SGND & PGND ?
> I found schematic that use +-15v and there is a points that marked with
SGND
> & PGND, aren't the same?
>

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