May 24, 2005 #1 V venkata Newbie level 1 Joined Apr 14, 2005 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,292 Hai I want to know which are the capacitances that wll be effected by scaling of a transister.What are the new capacitances that will come into picture.
Hai I want to know which are the capacitances that wll be effected by scaling of a transister.What are the new capacitances that will come into picture.
May 24, 2005 #2 eng_Semi Full Member level 6 Joined May 3, 2005 Messages 325 Helped 37 Reputation 74 Reaction score 6 Trophy points 1,298 Location Egypt Activity points 4,111 When u increase the transistor size, increase W/L, the parasitic capacitance are increasing, like cgs-cgd-cgb-... Do u face a certain problem ??
When u increase the transistor size, increase W/L, the parasitic capacitance are increasing, like cgs-cgd-cgb-... Do u face a certain problem ??
May 25, 2005 #3 N noiseless Full Member level 3 Joined May 24, 2005 Messages 172 Helped 15 Reputation 30 Reaction score 6 Trophy points 1,298 Activity points 2,495 I believe CGDO will become larger. As to new para caps, it depends on the process.
May 25, 2005 #4 E estradasphere Member level 4 Joined May 17, 2005 Messages 78 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,288 Activity points 1,900 actually all the capacitances (Cgd, Cgs, Cdb, Csb, Cgd etc.) including the parasitic overlap ones depend on the scaling.
actually all the capacitances (Cgd, Cgs, Cdb, Csb, Cgd etc.) including the parasitic overlap ones depend on the scaling.
May 25, 2005 #5 P Puppet1 Advanced Member level 2 Joined May 7, 2004 Messages 689 Helped 11 Reputation 22 Reaction score 9 Trophy points 1,298 Activity points 6,074 check razavi cmos book. talks about scaling with examples including what is scaled.
May 26, 2005 #6 P piao Full Member level 4 Joined Feb 12, 2003 Messages 221 Helped 12 Reputation 24 Reaction score 8 Trophy points 1,298 Activity points 1,517 the cap will be smaller with the scaling down, but the impact will be bigger.
May 28, 2005 #7 mmohsen Advanced Member level 4 Joined May 19, 2005 Messages 100 Helped 7 Reputation 14 Reaction score 2 Trophy points 1,298 Activity points 2,425 estradasphere said: actually all the capacitances (Cgd, Cgs, Cdb, Csb, Cgd etc.) including the parasitic overlap ones depend on the scaling. Click to expand... i agree with this reply piao wrote: the cap will be smaller with the scaling down, but the impact will be bigger. Click to expand... which impact ??? regards
estradasphere said: actually all the capacitances (Cgd, Cgs, Cdb, Csb, Cgd etc.) including the parasitic overlap ones depend on the scaling. Click to expand... i agree with this reply piao wrote: the cap will be smaller with the scaling down, but the impact will be bigger. Click to expand... which impact ??? regards
May 30, 2005 #8 Y yeechyan Advanced Member level 4 Joined Jun 14, 2004 Messages 111 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,298 Activity points 897 Smaller drain current, resulting in smaller transconductance.