Oct 21, 2005 #1 M majormac Newbie level 2 Joined Oct 21, 2005 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,296 Has anyone used moscap in a PLL loop filter? High capcitance per unit area is attractive. But I am worried about gate leakage current.
Has anyone used moscap in a PLL loop filter? High capcitance per unit area is attractive. But I am worried about gate leakage current.
Oct 24, 2005 #2 S sunking Advanced Member level 3 Joined May 25, 2004 Messages 873 Helped 70 Reputation 140 Reaction score 23 Trophy points 1,298 Activity points 6,283 dont worry about it. the leakage is very small.
Oct 24, 2005 #3 rfsystem Advanced Member level 3 Joined Feb 25, 2002 Messages 908 Helped 149 Reputation 294 Reaction score 38 Trophy points 1,308 Location Germany Activity points 9,548 Make shure that the cap variation over voltage does lead to PLL instability!
Oct 24, 2005 #4 F flushrat Full Member level 3 Joined Jan 25, 2005 Messages 180 Helped 23 Reputation 46 Reaction score 8 Trophy points 1,298 Activity points 1,532 If <=.13um process, be aware of leakage current. Use high-vt device or varactor or metal cap. If .18u or above, no problem.
If <=.13um process, be aware of leakage current. Use high-vt device or varactor or metal cap. If .18u or above, no problem.
Oct 28, 2005 #5 M majormac Newbie level 2 Joined Oct 21, 2005 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,296 i thought that hvt or lvt devices have the same oxide thickness, which means same gate leakage. 2V devices would be less leaky comparing to 1V devices which have thinner oxide...
i thought that hvt or lvt devices have the same oxide thickness, which means same gate leakage. 2V devices would be less leaky comparing to 1V devices which have thinner oxide...