On the Formulation of Self-Heating Models for Circuit Simulation

Different approaches to implement self-heating effects in a compact model are evaluated. The traditional approach using a subcircuit with the addition of an internal node can lead to significant increase in the simulation time. In contrast, by directly solving self-heating equations, the internal no...

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Bibliographic Details
Published in:IEEE journal of the Electron Devices Society 2018-01, Vol.6, p.291-297
Main Authors: Zhang, Lining, Song, Debin, Xiao, Ying, Lin, Xinnan, Chan, Mansun
Format: Article
Language:English
Subjects:
circuit self-heating
Circuits
Computer simulation
Electron devices
FinFETs circuits
Heating
High temperature effects
Integrated circuit modeling
internal-node free
Jacobi matrix method
Jacobian matrices
Jacobian matrix
Mathematical model
MOSFET circuits
Object recognition
Self-heating
Simulation
SPICE
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Summary:Different approaches to implement self-heating effects in a compact model are evaluated. The traditional approach using a subcircuit with the addition of an internal node can lead to significant increase in the simulation time. In contrast, by directly solving self-heating equations, the internal node is eliminated in the circuit Jacobian matrix. The resulting simulation time can be shortened in principle up to 60% or more without sacrificing the accuracy. The accuracy and time for self-heating simulations formulated using different approaches are compared in this paper to study their tradeoff. In addition, a generic approach to eliminate the need for internal nodes is proposed and demonstrated using the non-quasi-static effect model.
ISSN:2168-6734
2168-6734
DOI:10.1109/JEDS.2018.2801301