separate transformer instead of star power distribution?

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fala

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hi all, I have very sensitive analog signals which I usually use separate star configuration for power and gnd tracks of them. I want to know if I use a separate transformer just for this very sensitive analog signals and yet another transformer for less sensitive analog may I get better results(less noise, more stable gnd,...)?
regards,
 

since the circuits are connected together one part will surely have effect on the other.... in terms of the ground when you connect the ground plate of one to the other it will surely couple the noise from one part to the other and hence it purely depends on how well you ground the ground plate.....
 

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