Question basically says it all. Why is this a requirement?
A lot of small projects have no real ground, but only positive and negative supply rails. Nothing is actually connected to the case (which may be plastic anyhow.) So why do we need to add a superfluous connection point that doesn't even really exist in reality?
It seems the simulator could just as easily use 0 volts as a reference.
Now I know there are many circuits where ground is not only necessary, but the particular configuration (e.g., star) may be crucial, particular RF circuits. But in low-frequency or DC circuits that run on batteries, it seems totally unnecessary.
It isn't a safety issue, is it? What would a simulator care about that?
Color me curious.
A lot of small projects have no real ground, but only positive and negative supply rails. Nothing is actually connected to the case (which may be plastic anyhow.) So why do we need to add a superfluous connection point that doesn't even really exist in reality?
It seems the simulator could just as easily use 0 volts as a reference.
Now I know there are many circuits where ground is not only necessary, but the particular configuration (e.g., star) may be crucial, particular RF circuits. But in low-frequency or DC circuits that run on batteries, it seems totally unnecessary.
It isn't a safety issue, is it? What would a simulator care about that?
Color me curious.