How to reduce ground loop noise in a PCB layout?

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vijaya_narayana

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can any body give tell me how to reduce ground loop noise in a PCB layout
 

ground loop noise

Redesign the board?

Lots of groundplane, dont have breaks in it, dont have breaks in the return path of noisy/sensitive signals.
Keep sensitive signals away from noisy ones, find out whats generating the noise in the first place & redo that section of board (if not all of it).
 

Re: ground loop noise

have atleast one solid plane to reference the signals.
keep it closer to pwr plane(if it were gnd)
add decaps wherever u think noise would appear...(this is just a brute force method actually u ll have to calculate the decap vaule and decide the placement after many simulation iterations)
 

ground loop noise

Filter, CAP, one point center grounding, shielding, etc.
 

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