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how to do mismatch analysis on spectre

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chinito

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I want to do mismatch analysis between two transistor using spectre, how do I do this?
 

ccw27

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Do monte-carlo analysis. Foundry like TSMC includes monte-carlo analysis in their model files. If your foundry does not provide then you will have to write it yourself. An easy way is to add a voltage source for each MOS, which will emulate the Vth mismatch. Then you should write a script where you will include the value of standard deviation. The standard deviation can be calculated using mismatch characterization provided by the foundry.
 

xinyin

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Hello ccw27,

Can you tell me how to make monte-carlo model files if the foundry does not provide them?
 

nxing

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Check Cadence's help document, you will find a model.
 

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