Ca ii λλ3934, 3969 absorbers, which are likely to be a subset of damped Lyman α systems, are the most dusty quasar absorbers known, with an order of magnitude more extinction in E(B−V) than other absorption systems. There is also evidence that Ca ii absorbers trace galaxies with more ongoing star-formation than the average quasar absorber. Despite this, relatively little is known in detail abou...

The aim of this work is to assist designing of robust circuits to minimize the amount of defective circuits and therefore to increase the yield of production. The Fraunhofer ITWM considers electronic circuits at system level using its EDA software Analog Insydes, which allows analysis and symbolic approx ima tion of nominal analog circuits. The software now has been extended to handle parameter...

Ca ii λλ3934, 3969 absorbers, which are likely to be a subset of damped Lyman α systems, are the most dusty quasar absorbers known, with an order of magnitude more extinction in E(B−V) than other absorption systems. There is also evidence that Ca ii absorbers trace galaxies with more ongoing star-formation than the average quasar absorber. Despite this, relatively little is known in detail abou...

Electroacoustic absorbers consist of loudspeakers, shunted with an electrical circuit designed to obtain a given acoustic impedance. Their design and principles are now well understood. Unidimensional experiments, using plane waves under normal incidence in ducts, agree perfectly with simulations and confirm the validity of the model: the low-frequency absorption is maximal (and total) when the...

A novel metamaterial absorber design able to operate in the C frequency band is presented, along with an analysis and a method to improve both its bandwidth and its angular stability. Simulation results for a FR4-based design are shown for comparison with existing designs. In addition, a simplified equivalent circuit is provided for a better understanding of the great angular stability and wide...

An ultra-broadband absorber of light is proposed by using periodic array of ultra-thin metallic ribbons on top of a lossless quarter-wavelength dielectric spacer placed on a metallic reflector. We propose a fully analytical circuit model for the structure, and then the absorber is duly designed based on the impedance matching concept. As a result, normalized bandwidth of 99.5% is realized by th...

The test of Analogue and Mixed-Signal (AMS) cores requires the use of expensive AMS testers and accessibility to internal analogue nodes. The test cost can be considerably reduced by the use of Built-In-Self-Test (BIST) techniques. One of these techniques consists in generating analogue test signals from digital test patterns (obtained via Σ∆ modulation) and converting the responses of the anal...

Digital circuit design is extensively assisted bymodern automation tool unlike analog design which is still a manual task because of the complexity of the interactions between devices. This paper presents a semi-automated analog placement based on margin tolerances controlled by the designer by creating analog circuits organized in row similar to digital circuits structure. The results show the...

The idea is using advanced analog design methodology for LVLP to push the basic analog circuit design toward LVLP applications. It is necessary to point out that this report is just an outline of what the final project will accomplish. Those parameters mentioned above are subjected to be changed during the design process to achieve higher performance or more realistic. Parameter Name Value Para...