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currently i am designing an 64 bit DDR3 with fly by topology. for address and command i have 47ohm far end termination. do we need any termination for clock pairs. also if you have any specific hardware guidelines please let me know other than layout guidelines.
I am designing the PCB board with high current carrying load,for that i am planning to put copper shape in all 4 layers with stitching vias.
For vias connection which option will be better one ,either full solid connection or spokes?
FYI:Here there will be more heat generated, due to high...
How to create menu in allegro using skill.
EX:in setup we have some commands.in that setup menu bar i want add "More grid" in that we need to create 1 mil grid,5mil grid and 10 mil grid tabs like that
please help me
please tell me why we are using ac coupling caps in pcb design?
in my board have USB and device(Bga) in this i am using ac coupling for Transmitter signals alone not for Receiver signals please tell me whats reason behind?
also why we need to place those AC coupling caps close to device?
1.Use the default aliases.
2.Define temporary aliases for an individual work session by typing alias and the arguments at the console window prompt.
3.Establish aliases in a local environment file that remain in effect at every login until you change the environment file.