If a double-sided pcb has a very large DIGITAL GND net and a small ANALOG GND net 
would you connect the two GROUND planes created on the two layers to the DGND or AGND?

Connecting DGND would mean better current handling and thus presumably reduce digital 
noise but would the large plane then act as an transmitter to the AGND?
Connecting AGND would mean a cleaner audio path but would it then act as an aerial to 
all of the DGND nets on the board?

The application is an audio synth using, fundamentally, digital components (for the 
VCOs, Noise and controllers) but linear devices for the final audio paths (VCF, VCA 
and audio output).


Best Regards
Laurie Biddulph
http://www.elby-designs.com


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