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How to calculate capacitor mismatch number from Spectre model?

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rampat

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how to calculate capacitor mismatch number from spectre model ?
 

calculating capacitor mismatch

what is spectre model? i am currently looking for computation of mismatch. i already read the art of analog layout of hastings but i need more. tnx.
 

capacitor mismatch tsmc

I am talking abt spectre spice model provided by TSMC for 0.18u CMOS technology
 

capacitor in 0.18u site:edaboard.com

Usually process specification include matching coefficients A for capacitors, resistors and transistors. Mismatching is described σ = A / (√ W • L)
 

capacitor mismatching

There are two points:
1. Normally, mismatch depent on the layout; So if some cap should be match, more should be pay; some papers include "the art of layout" has inform this;
2. One good fab should offer the different device mismatch datasheet, just as gevy said;

Added after 2 minutes:

BTW, welcome any comment and/or suggestions/ questions. Email->babbage.song@gmail.com
 

capacitor mismatch

Check the documetation offered by TSMC, you can see the function of sigma.
 

Re: capacitor mismatch

i think you can read the technology file from foundry

uote="rampat"]how to calculate capacitor mismatch number from spectre model ?[/quote]
 

capacitor mismatch

Just use worst case mismatched capacitor to run the simulation to evaluate the mismatch dependcy.
 

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