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Old 04 June 2019, 12:11   #17
hooverphonique
ex. demoscener "Bigmama"

 
Join Date: Jun 2012
Location: Fyn / Denmark
Posts: 1,044
Quote:
Originally Posted by Kai View Post
...star power?

if you run e.g. single power/gnd traces around the board from chip to chip, you risk creating a big loop which is bad for EMI, and also may cause supply problems for chips along the (thin) trace since they will each cause a voltage drop so when you get to the last chip on the trace, the voltage could be too low to run the chip properly. 'Star' just means running traces out from some specific point so the power consumption of one chip doesn't affect others so much, and if you can run power and gnd close to each other on each side of the board, this also helps reduce radiation (because the power/gnd loop is small).
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