Originally posted by tyger23
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Star grounding is a good idea and makes you think about you grounding and keeping the sensitive signal returns from sharing ground impedances with dirty power supply and decoupling return currents. Mixed signal grounding and decoupling is almost an art and there have been countless numbers of articles and books written on the subject. I would be surprised if I have read less than fifty articles of the subject.
I worked on a telecom line card that had four different grounding subgroups for digital, analog, lightning protection, and electrostatic discharge. Capacitive and electromagnetic coupling between all these grounds had to be considered. Keeping the ground bounce from resisting the micro or ASICs was a task I would not wish on anyone. I had the best layout guy
I will ever meet using Mentor Graphics software on a Sun workstation. Both of us nearly lost our minds and it took over a year out of my life. The board was only 2 layers in smaller in area than a shoe box. When someone comes out and says that competently designed audio products should sound the same, the word competently covers a lot of ground (no pun intended.
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