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Versatile algorithms for nanoscale designs

Starting point of all ICESTARS research is a sound mathematical basis. Mathematical equations such as ordinary differential equations (ODEs), differential-algebraic equations (DAEs) and partial differential equations (PDAEs) are center to simulate and predict the behaviour of the designed ICs, before the expensive manufacturing process starts. These algorithms have in ICESTARS been modified to cover extended functionalities or entire new ones have been developed to meet the demands of circuits operating in frequency ranges between 10 and 100 GHz.

In the Time Domain an entirely new, so-called adaptive wavelet-based, circuit simulation algorithm has been developed and successfully tested ... read more.

In circuit-envelope simulation the project succeeded in exhibiting a general mathematical framework that can be adapted to different classes of RF circuits ... read more.

Adaptivity was core to the frequency-domain research. The project aimed at achieving a reasonable estimate for the initial conditions for distortion analysis of free-running oscillators, and for the first time, in ICESTARS, a truly generic multi-device, a so-called VoHB algorithm, was coded and tested for circuits that are larger than plain single-transistor power amplifiers. ... read more

Convential equations for EM circuits neglect physical effects and only try to re-build complex building blocks using single parameters – a procedere lacking efficiency as there might be up to 800 parameters. In an entirely new mathematical undertaking these problem was tackled by modeling the building blocks using PDAEs to better project the physical complexity of the models. … read more