Aug 19, 2005 #1 R Robertt Junior Member level 3 Joined Jun 20, 2005 Messages 31 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,634 where I should connect the dummy capacitors' plates? just leave them unconnected or connect them to VDD or GND? Thanks a lot
where I should connect the dummy capacitors' plates? just leave them unconnected or connect them to VDD or GND? Thanks a lot
Aug 19, 2005 #2 N nxing Advanced Member level 1 Joined May 10, 2004 Messages 421 Helped 25 Reputation 50 Reaction score 10 Trophy points 1,298 Location China Activity points 2,856 connect them to GND.
Aug 19, 2005 #3 R Robertt Junior Member level 3 Joined Jun 20, 2005 Messages 31 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,634 Can I connect one plate to gnd, another to vdd to filt the power supply's noise?
Aug 19, 2005 #4 O ocarnu Member level 5 Joined Aug 5, 2005 Messages 90 Helped 9 Reputation 18 Reaction score 2 Trophy points 1,288 Activity points 2,336 Dummy cap used for matching? Keep in mind, if you connect them to gnd/vdd will introduce some parasitic capacitance on the perimeter of you cap. I'd say to leave upper plate in open circuit. This is how is done in layout pdks with parametric cells.
Dummy cap used for matching? Keep in mind, if you connect them to gnd/vdd will introduce some parasitic capacitance on the perimeter of you cap. I'd say to leave upper plate in open circuit. This is how is done in layout pdks with parametric cells.
Aug 20, 2005 #5 M muldersun Member level 1 Joined Dec 3, 2003 Messages 40 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,288 Activity points 356 Connect to rail I think floating is not good
Aug 20, 2005 #6 R Robertt Junior Member level 3 Joined Jun 20, 2005 Messages 31 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,634 Connect to rail Click to expand... connect to rail, you mean power supply? ocarnu, leave the upper plate open wont cause any error when you do LVS checking?
Connect to rail Click to expand... connect to rail, you mean power supply? ocarnu, leave the upper plate open wont cause any error when you do LVS checking?