This work describes a Fast novel thermal analysis simulation tool for integrated circuits (FANTASTIC), which is fully automated and relies on an enhanced version of the Multi-Point Moment Matching algorithm. The tool provides a novel equivalent network suitable for use in SPICE-like circuit simulators to perform efficient thermal and electrothermal analyses. FANTASTIC requires much less CPU time and memory storage compared to commercial simulators. The thermal behavior of a state-of-the-art four-finger GaAs HBT is investigated as a case-study.

Discretization of diffusion-equation modeling heat conduction in electrical devices, as needed for accurate electrothermal simulations, tends to produce thermal networks of very large size. This paper investigates an effective method for thermal network complexity reduction preserving high accuracy in electrothermal analysis. The method is based on a suited port-like definition of thermal network and on the use of the truncated balanced-reduction method. The strategy is practically applied to the electrothermal simulation of a power vertical double diffused MOSFET.

This paper presents an efficient circuit-based approach for the nonlinear dynamic electrothermal simulation of power devices and systems subject to radical self-heating. The strategy relies on the synthesis of a nonlinear compact thermal network extracted from a finite-element model by a novel model-order reduction method requiring a computational time orders of magnitude lower than conventional techniques. Unlike commonly employed approaches, the proposed network allows reconstructing the whole time evolution of the temperature field in all the points of the domain with high accuracy. Electrothermal simulations are enabled in a commercial SPICE-like simulator by coupling such a network with subcircuits that describe the electrical device behavior by accounting for the temperature dependence of the key physical parameters. As a case study, the dynamic electrothermal analysis of a packaged silicon carbide power MOSFET undergoing a short-circuit test is performed, showcasing the performance of the approach and highlighting the need of including the thermal nonlinearities to achieve reliable results.

A novel approach is proposed for generating compact dynamic thermal models of packages, independent on boundary conditions. This approach is based on the novel definition of Robin's boundary condition independent dynamic thermal network and on the application of a novel multivariate moment matching method. The resulting compact thermal models are more accurate than compact models obtained by means of previous methods.

We examine the construction of a symmetric positive definite conductance matrix for eddy-current problems, using a discrete approach. We construct a new set of piecewise uniform basis vector functions on both the primal and the dual complex. We define these vector functions for both tetrahedra and prisms