According to Wikipedia, "signal ground" means return path for signal and power:
Signal grounds serve as return paths for signals and power (at extra low
voltages<https://en.wikipedia.org/wiki/Extra_low_voltage>, less than about 50
V) within equipment, and on the signal interconnections between equipment. Many
electronic designs feature a single return that acts as a reference for all
signals. Power and signal grounds often get connected, usually through the
metal case of the equipment. Designers of printed circuit
boards<https://en.wikipedia.org/wiki/Printed_circuit_board> must take care in
the layout of electronic systems so that high-power or rapidly switching
currents in one part of a system do not inject noise into low-level sensitive
parts of a system due to some common impedance in the grounding traces of the
As far as I can tell, this has nothing to do with the question whether it is
or globally in a specific design... I believe it could go either way.
From: Walter Katz [mailto:wkatz@xxxxxxxxxx]
Sent: Wednesday, March 7, 2018 7:35 AM
To: Muranyi, Arpad <Arpad_Muranyi@xxxxxxxxxx>; ibis-macro@xxxxxxxxxxxxx;
Subject: RE: [ibis-macro] New BIRD draft for replacing BIRD158.7
Google "signal ground". is what we have been calling "local ground", and you
will get the following picture:
Google "local ground" and it returns nothing to do with electronics other than
"Local Ground is the ninth studio album by Irish folk
Altan<https://en.wikipedia.org/wiki/Altan_(band)>, released in March 2005 on
the Narada<https://en.wikipedia.org/wiki/Narada_Productions> label.", which can
be played on electronic audio equipment.
The word "local" appear in IBIS 6.1, and never in the context of a local ground
I therefore suggest that we consistently use "signal ground" instead of "local
ground" in both BIRD 158 and 189.
978.461-0449 x 133
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad
Sent: Wednesday, March 7, 2018 3:42 AM
Subject: [ibis-macro] New BIRD draft for replacing BIRD158.7
In today's ATM teleconference I took an AR to start a new BIRD that would
replace BIRD158.7. The attached BIRD draft is my first attempt for that BIRD.
I took the approved BIRD158.7 and changed its file name along with some of
the header information. The only other thing I changed was the text related
to the reference nodes of the Touchstone models. I did all this with Track
Changes turned on, so that it would be easy to find my changes. I can add
anyone's name on the top who wants to be listed as a requestor...
Please review and reply with questions/comments.
Wil will most likely need to make changes to the
ANALYSIS PATH/DATA THAT LED TO SPECIFICATION
ANY OTHER BACKGROUND INFORMATION
sections to explain all this, but we can do that later.