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Sensitivity analysis is an important tool that can be used to assess and improve the design and accuracy of a model describing an electronic circuit. Given a model description in the form of a set of differential-algebraic equations it is possible to observe how a circuit's output reacts to varying input parameters, which are introduced at the requirements(More)
The goal of mathematical model order reduction (MOR) is to replace the non-automatic compact modeling, which is the state of the art in simulation flow of microelectronic and micro-electro-mechanical systems (MEMS). MOR offers a possibility of automatically creating small but very accurate models which can be used within system level simulation. The main(More)
Transient analysis is an important circuit simulation technique. The circuit model, which is a system of differential-algebraic equations, is solved for a given initial condition using numerical time integration techniques. Multirate methods are efficient if the dynamical behaviour of the circuit model is not uniform. 1 Introduction Analog electrical(More)
Most analyses of circuit equations start with solving the steady-state (DC) solution. In several cases this can be very hard. We present a novel time domain source stepping procedure to obtain a DC solution of circuit equations. The source stepping procedure is automatically adap-tive. Controlled sources can be elegantly dealt with. The method can easily be(More)
Multiphysical 1 and network modeling usually lead to coupled systems that exhibit largely different timescales. In time domain it is called multirate, in space multiscale. Efficient algorithms need to take these phenomena into account. Such methods are specially requested by industry. As a practical example one can think of a cellular phone, which consists(More)
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