The approach to computer aided hierarchical circuit design on the base of univariate algorithms was derived by the analysing the mathematical principles behind recombination. In this paper it is considered how to introduce mutation in this approach. A number of experiments applied to circuit design are discussed. Experiments indicate that mutation and elitism increase the performance of the alg...

The traditional dilemma for performing network simulations with analog circuits is the great difficulty of handling the connectivity in hardware. The main problem is that hardware-based connectivity must be built following predefined plasticity and connectivity rules, and that once the hardware is built, it is usually not possible to change its configuration. We show here an alternative system ...

We present a metamaterial absorber detector array that enables room-temperature, narrow-band detection of gigahertz (GHz) radiation in the S band (2-4 GHz). The system is implemented in a commercial printed circuit board process and we characterize the detector sensitivity and angular dependence. A modified metamaterial absorber geometry allows for each unit cell to act as an isolated detector ...

This contribution reviews some of the latest achievements and challenges in thin-film silicon photovoltaic (PV) technology based on amorphous and nanocrystalline silicon and their alloys. We address material and device developments, including (i) improved plasma deposition processes to achieve high-quality dense absorber materials; (ii) absorber layers based on silicon tetrafluoride, which lead...

This paper describes an improved version of the program SEAS (a Simulated Evolution approach for Analog circuit Synthesis), in which an approach for selection of alternatives based on the evaluation of mutation values is developed, and design automafion for high performance comparators is covered.

A method for visualization of analog circuit schematic starting from a netlist is described in this paper. The images obtained have a comprehensible form, symmetrical structures and other analog topological patterns being discovered in the circuit netlist. The method is based on two algorithms. The first one, the symmetry algorithm, exploits the possibility to extract topology information from ...

Low-cost hybrid solar cells have made tremendous steps forward during the past decade owing to the implementation of extremely thin inorganic coatings as absorber layers, typically in combination with organic hole transporters. Using only extremely thin films of these absorbers reduces the requirement of single crystalline high-quality materials and paves the way for low-cost solution processin...

In recent years, there has been an expanding research on the applications of fractional calculus to the areas of signal processing, modeling, and controls. Analog circuit implementation of chaotic systems is used in studying the nonlinear dynamical phenomena, as well as applied in realizing the controller development. In this paper, chain fractance and tree fractance circuits are constructed to...

In this thesis three novel analog techniques for testing CMOS Integrated circuits are presented. These techniques are based on analog circuits since they offer a number of important advantages compared to standard digital test techniques, such us less silicon area, lower power consumption and high operating speed. Therefore, the proposed techniques can be embedded in the circuit under test, con...