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TOMN Model, Area parameter

Question asked by ABOMPA on Apr 30, 2003
Latest reply on Jun 10, 2003 by ABOMPA

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I have been using the TOMN model and understand all the required parameters with the exception of the "area" parameter. I normally think of the device periphery, which is defined as , number of gate fingers x gate width. So if I have 6 gate fingers at 50microns, this will yield a gate periphery of 300microns. What is the "area" and how does it relate to the gate periphery? I do not see any dimensions, is it a relative parameter, and if so, relative to what?

Thanks

Tony

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SERGEYTRU May 2, 2003 3:08 AM
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The "Area" factor used in a instance of a nonlinear model is a relative parameter. It determines the number of equivalent parallel devices of a specified model. The defaut value of the parameter is 1. In IC designs the parameter may be of any real value. It defines the relative area scale a device implemented in the IC versus the device area, parameters of which defined in the used model. For example, the parameters the nonlinear diode model affected by the AREA factor are: Is, Rs and CD(0); that is Is'=IsxAREA; CD(0)'=CD(0)xAREA; rs'=rs/AREA

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Sergey Trushin
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ABOMPA Jun 10, 2003 1:45 AM
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After closer examination of the models I received from Triquint it became apparent that what is referred to as area is indeed the gate periphery of the device. Your references to the device parameters and how they are effected by area highlighted this. Thanks.........
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TOMN Model, Area parameter

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