I'm designing a schematic with isolated 12v power supply that handles analog/digital isolated signals comming from external wires to the PCB.
No I'm trying to understand what is going on if I put a common mode filter that must be referenced to the earth ground as on this image http://my.execpc.com/~endlr/a_B2.gif , that is done with C1 and C2.
As i understand all high frequency content that is common mode noise will be shunted to the earth ground, but does this mean that 12V isolated power supply line now is not not isolated or that just DC part is isolated while AC part that is mostly noise in RF range is not?
No I'm trying to understand what is going on if I put a common mode filter that must be referenced to the earth ground as on this image http://my.execpc.com/~endlr/a_B2.gif , that is done with C1 and C2.
As i understand all high frequency content that is common mode noise will be shunted to the earth ground, but does this mean that 12V isolated power supply line now is not not isolated or that just DC part is isolated while AC part that is mostly noise in RF range is not?