So I have asked a similar question and was wondering if I could trouble you guys for a little more advice. I believe I have taken all of the advice from before into account. Ill get right into it.
Above you can see my schematic, where the DC barrel jack sees 18VAC. This is sent through a doubler which is then smoothed and rectified twice. The reason for rectifying twice is to get improved ripple rejection.
There are many other parts to this board that are highly sensitive to any sort of noise, these parts will lie to the right of the power section as per figure 2. I have looked into splitting the ground plane and have come up with the following layout.
So the area on the far left is where the AC supply (18VAC) goes directly into the caps and diodes for rectification. After this, the remainder of the circuit is spead around before the rails emerge at the opposite end.
The ground plane for all of the power supply related compoennts only meets with the signal ground plane near the power inlet (top left of the board, fig 2(b)).
Here is a 3d render of what the components are.
So my question is this, will this actually achieve what I want it to achieve. Will there be no noise from the power section in the sensitive analog components that will be placed all to the right of the power section as per figure 2.
Is there some obvious principal that I have overlooked?
If so, is there any other way you would recommend doing this type of thing? Apologies if this question has offended anyone, I have experience with audio circuit design but have never put an AC power supply on the same PCB as preamps before.