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[SOLVED] Cadence Virtuoso DC operating points

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kenambo

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Hi

While printing DC operating points, I came across some Terms which are Vearly and Beff.
Does the Vearly represent Actual Early Voltage of the MOS transfer curve?

and Beff reperesents real beta value ( u*cox*w/l)?

thanks
 

erikl

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While printing DC operating points, I came across some Terms which are Vearly and Beff.
Does the Vearly represent Actual Early Voltage of the MOS transfer curve?

and Beff reperesents real beta value ( u*cox*w/l)?

Yes, both right!
 

Dominik Przyborowski

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Beff reperesents real beta value ( u*cox*w/l)?
In fact Beff represent beta effective calculated from square law equation and its enormous high for mosfets working in center of moderate inversion (it doesn't depends to actual model used in simulations).
You can check it by biasing fet with Vgs close to Vth.
 

kenambo

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Hi guys,

Thanks for the comments and Dominik I will check what you said.

I thought Beta effective must be constant but it changes according to gate voltages. Is that any relation between gate voltage and Beta value and My MOS models are BSIM 4 models

thanks.
 

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