Aug 1, 2004 #1 L Lantis Junior Member level 3 Joined Dec 29, 2003 Messages 31 Helped 3 Reputation 6 Reaction score 2 Trophy points 1,288 Activity points 298 vth variation monte carlo simulation Dear All: I got some questions when I perform monte carlo simulation. There are two transistor Mp1 and Mb2: mp1 va va vr1 vr1 pch w=2.7u l=3u m=1 delvto='DeltaVt_MMB2' MMB2 net25 va vdd! vdd! pch W=20.25u L=1u M=12 +delvto='DeltaVt_MMB2' .param DeltaVt_MMB2 = agauss(0,0.01,3) I want to let the two transistor matching so I let the delvto value the same. But when I see the vth deviation from Awaves .probe dc vtmb2=par('LV9(x8.MMB2)') vtmp1=par('LV9(x8.mp1)') The vth variation of these two transistor still different with each other. what should I do if I want to simulate this matching effect? Can any one could help me?
vth variation monte carlo simulation Dear All: I got some questions when I perform monte carlo simulation. There are two transistor Mp1 and Mb2: mp1 va va vr1 vr1 pch w=2.7u l=3u m=1 delvto='DeltaVt_MMB2' MMB2 net25 va vdd! vdd! pch W=20.25u L=1u M=12 +delvto='DeltaVt_MMB2' .param DeltaVt_MMB2 = agauss(0,0.01,3) I want to let the two transistor matching so I let the delvto value the same. But when I see the vth deviation from Awaves .probe dc vtmb2=par('LV9(x8.MMB2)') vtmp1=par('LV9(x8.mp1)') The vth variation of these two transistor still different with each other. what should I do if I want to simulate this matching effect? Can any one could help me?
Aug 2, 2004 #2 B bear7679 Member level 2 Joined May 18, 2004 Messages 51 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 412 delvto What is the voltage of vr1, is it same with vdd!. If they are same, I think you can keep them with no deviation, you can change the other MOS's Vth.
delvto What is the voltage of vr1, is it same with vdd!. If they are same, I think you can keep them with no deviation, you can change the other MOS's Vth.
Aug 3, 2004 #3 H Hughes Advanced Member level 3 Joined Jun 10, 2003 Messages 715 Helped 113 Reputation 226 Reaction score 26 Trophy points 1,298 Activity points 5,984 www.mmb2.com.br If you want the 'DeltaVt_MMB2' is the same for mp1 and MMB2, you should put this parameter into the model statement.
www.mmb2.com.br If you want the 'DeltaVt_MMB2' is the same for mp1 and MMB2, you should put this parameter into the model statement.
Aug 3, 2004 #4 H Humungus Full Member level 6 Joined Jul 10, 2001 Messages 383 Helped 41 Reputation 82 Reaction score 15 Trophy points 1,298 Activity points 3,985 No way with all other answers. You've got to specify that those parameters are LOT variations. LOT parameters have the same value every time they are instanced. DEV parameters have different values in every intantiation. LOT parameters represent the variations of the whole lot processed. DEV parameters correspond to mismatch among similar devices.
No way with all other answers. You've got to specify that those parameters are LOT variations. LOT parameters have the same value every time they are instanced. DEV parameters have different values in every intantiation. LOT parameters represent the variations of the whole lot processed. DEV parameters correspond to mismatch among similar devices.
Jul 4, 2008 #5 T tracy_smile Newbie level 3 Joined Aug 31, 2007 Messages 4 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,305 I think if you write like this, .param DeltaVt_MMB2 = agauss(0,0.01,3) .param DeltaVt_1=DeltaVt_MMB2 mp1 va va vr1 vr1 pch w=2.7u l=3u m=1 delvto=DeltaVt_1 MMB2 net25 va vdd! vdd! pch W=20.25u L=1u M=12 +delvto=DeltaVt_1 you may get the same Vth in every run.
I think if you write like this, .param DeltaVt_MMB2 = agauss(0,0.01,3) .param DeltaVt_1=DeltaVt_MMB2 mp1 va va vr1 vr1 pch w=2.7u l=3u m=1 delvto=DeltaVt_1 MMB2 net25 va vdd! vdd! pch W=20.25u L=1u M=12 +delvto=DeltaVt_1 you may get the same Vth in every run.
Dec 31, 2008 #6 B bharatsmile2007 Full Member level 3 Joined Sep 19, 2007 Messages 179 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,298 Activity points 2,306 Hi all, If u see the below line .param DeltaVt_MMB2 = agauss(0,0.01,3) what does 0,0.01,3 represent in agauss? Thanks
Hi all, If u see the below line .param DeltaVt_MMB2 = agauss(0,0.01,3) what does 0,0.01,3 represent in agauss? Thanks