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When simulating mixed-signal systems, designers are often dissatisfied either with performance or accuracy. A state-space based precomputation method for analog circuits at electrical level allows for a considerably faster simulation than with SPICE-like simulators. Utilizing an automatically generated SystemC interface, our simulation kernel analyzes mixed analog/digital circuits where the digital...
This paper presents a novel method for the design of filter capacitors of dc-dc switching regulators, using a combination of ceramic and electrolytic capacitors. The method is based on the definition of Acceptability Regions, which allow a straightforward identification of minimal size and part count commercial components complying with the voltage ripple and Irms current specifications on the capacitors.
In order to solve two major bottlenecks of the analog design flow: the time-to-market and the production yield, we introduce in this paper a design tool for measuring the robustness capability of the analog circuit topologies with the guarantee of fulfilling all the design specifications. With this measure, we can describe the feasible subspace by using the set inversion algorithm. A robustness estimation...
We present the calculation of noise expressions of low voltage amplifiers by applying symbolic nodal analysis and using nullors. The nullor equivalents of the MOSFETs include only the dominant parasitic elements in order to generate a simplified symbolic noise expression, which provides a good insight to improve the design of low voltage amplifiers. The generated symbolic noise expressions are compared...
In this paper, we use a modified version of the incidence matrix of an un-oriented graph so as to enumerate all the spanning trees. In particular, we formally describe the problem and then enumerate the spanning trees, also Showing how to use this method in finding the symbolic determinant of a passive circuit.
This brief proposes a novel multi-objective heuristic. It is a transformation of a mono-objective heuristic into a multi-objective one by addition of an archive and some non dominance computing routines. Performances of the proposed heuristic are demonstrated thru test functions. An application to the optimal sizing of a class AB second generation CMOS current conveyor is presented. Comparison with...
Using symbolic algorithms for small signal circuit parameter extraction could make possible implementing extraction programs which, unlike those based on pure numerical methods, no longer require initial (“start”) values for the parameters being extracted, thus ensuring that the final result corresponds to the true global minimum of the error function. Solving the extraction problem, in the particular...
This article describes logical analysis infrastructure of associative tables (matrices), which enables to perform processing the interaction of the input vector with n-dimensional algebra-logical space, specified by using the ordered and structured tables of problem-oriented data, which represent the associative behavioral models of logical objects. To estimate the interaction of vectors in algebra-logical...
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