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  1. S

    DDR3 hardware circuit design

    i checked some of the datasheets but i didn't get the clear information. If you have any link can you please send.
  2. S

    DDR3 hardware circuit design

    Hi Friends, 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. Thanks
  3. S

    Soild vias connection VS Via connection with thermal spokes

    Hi Klaus, You are right,but my question is for heat dissipation which kind of via connection solid or spokes would be better one. Thanks, samy
  4. S

    Soild vias connection VS Via connection with thermal spokes

    Hi, 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...
  5. S

    How to create menu in allegro using skill

    Hi, 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
  6. S

    Altium Netlist to be imported in Allegro

    hi, we have one software to convert from altium netlist to allegro.please check in google. once converted we can import that netlist using third party netlist
  7. S

    allegro brd file and orcad capture interlink

    hi, i have opened both schematic and brd file ,if i am selcting some parts in schematics means automatically these parts should be higilited or selected in allegro brd file (cross probing)
  8. S

    allegro brd file and orcad capture interlink

    hi, i am using allegro 16.5 .please tell me how to interlink orcad schematic and allegro brd
  9. S

    How to add xnet constraint in Allegro 16.5?

    hi, please tell me how to add xnet constraint constraint in allegro 16.5. there is no option like allegro 16.3 for assingning xnet in 16.5
  10. S

    Would U tellme Pads file(.pcb)into allegro file(.brd).. plz

    hi, please take ascii from pads file. imoport that acsii into allegro by file >import>cads translator>pads
  11. S

    Altium - Physical connection are not visible on PCB

    may be software problem,install altium once again,i got this kind of problem after new installation problem solved
  12. S

    [SOLVED] Please help me convert Allegro .brd file to Altium .PcbDoc or .pcb file

    hi, i had converted the file but the file was in altium 09 version. if i gave is it possible to use because you are having Altium Designer6.
  13. S

    Error with Drill in Allegro

    hi, i thing u have two shapes in that location please delete one.
  14. S

    AC coupling cap in pcb

    hi, 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?
  15. S

    How to export silk text

    hi, let me know you want to export reference designator or text?..text means you can export by subdrawing(file -export-subdrawing)
  16. S

    differential pairs routing

    Re: diffrential pairs routing hi, once you completed that pads router file save that.at that time opening saved file it will open in pads layout not in router, if you want router you can use
  17. S

    defining shortcut keys

    hi all, please tell me how to define shortcut keys in allegro?if i define using alias means once i closed the file that will not work can you tell me how to do that.
  18. S

    differential pairs routing

    Re: diffrential pairs routing hi, in pads layout2005 we can't route differential pairs both at the same time positive and negative signals.we need to route like single ended but we need make sure the air gap manually.if you want to route both at the same time route in the pads router in this...

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