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Plz can you guys kindly answer my post # 15 too?
You should not have any problem with ground loops.
Thanks. But why are you thinking so while I think the ground CURRENt in the pic of post #15 has Two ways to reaches to the output ground or vice versa? Actuall I think that It is better to disconnect the outer ground loop from the ground and let it to be free (not connected to anywhere). Any idea plz?
The red rectangle of the PCB design as in post #15 is obviously drawn on the component layer, which means the PCB must be double sided.
If you do use a double sided PCB just call the red rectangle "ground" as you should have done on the solder side. Both grounds are connected physically already via the ground pins of the connectors.
If a 100nF cap on the output creates a short the 100nF cap on the input would also create one.
That's nonsense since a cap won't let pass DC - it will only be charged.
Just build the circuit as planned and rearrange the parts for a complete ground pour for the entire board.
Boncuk
Opps! Actually the red rectangle is not something more than an INDICATOR, I wanted to show the ground loop portion, so I used an read color indicator (the board is just signal layer).
We did not talk sbout 100nF ceramic caps as the element of the shorting, we meant the big electrolyte ones at the out put (for instance a 100 or 200uF cap). is it make sense plz?