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This paper is focused on the dynamic modelling of the polycrystalline silicon wafer-based photovoltaic cells under various operational and fault conditions. The models are drawn from the impedance changes observed using electrochemical impedance spectroscopy. In this paper, tests were carried out at different voltage bias levels under illumination, dark, uniform partial shading, and cell-mismatch...
In this paper, a hierarchical motion estimation (ME) algorithm is proposed for motion-compensated frame interpolation. The algorithm estimates the true motion vector field (MVF) of a video frame from its candidate MVFs, which are the results of full-search block-matching that utilizes multiple block sizes, by maximizing the posterior probability for the true MVF. Owing to probabilistic models utilized...
The lifetime of power DMOS devices subjected to Thermal Induced Plastic Metal Deformation (TPMD) is highly dependent on the design of the metallization systems and thus requires the understanding of temperature, stress and strain distribution. This paper introduces and studies via numerical simulations with finite element method (FEM) a simple three dimensional (3D) transistor substructure commonly...
SPlCE-compatible modeling with generalized lumped devices is used to simulate the spatial and time dependence of photogenerated carriers with standard circuit simulators. Equivalent voltages and currents are used in place of minority carrier excess concentrations and minority carrier currents respectively. The initial light-induced excess carrier concentration in silicon is accounted by means of distributed...
A piezoelectric micro-cantilever energy harvester was designed for a standard industry process and its expected power generation capability was simulated using two different analytical models: a simplified one-dimensional model and a circuit equivalent model. The estimated power obtained was compared with the results of similar structures published by other authors, adopting a novel performance parameter...
The effects of fast neutron radiation up to flux of 1014 cm−2 (1 MeV equivalent flux) upon the turn-on and forward static characteristics of MOS-Controlled Thyristor (MCT) are described in this work, based on physics-based 1-dimension analytical calculation and 2-dimension Silvaco simulation. It is reported for the first time that dependency of on-state specific resistance (Ron) upon neutron flux...
Post-silicon validation is concerned for discovering design errors that escape to the silicon prototypes. Recent research efforts have shown how to reuse the constraints from pre-silicon verification to support post-silicon constrained-random validation. The objective is to subject the prototype to a large volume of random, yet functionally-compliant stimuli. In this paper, we present a new method...
Graphene barristor, in which a Schottky barrier formed between graphene layer and silicon layer can widen the bandgap with the control of gate voltage, is a promising method to enhance on/off current ratio in digital circuit design. In this work, a theoretical study is presented based on analog behavior modeling in SPICE. We have developed a compact device model to evaluate the performance of graphene...
This paper presents an embedded bandstop filter in package to enhance the electromagnetic susceptibility (EMS) of integrated circuits (ICs). Equivalent model and test based on standards and specifications are the possible way to characterize the EMS of ICs. The designed coplanar bandstop filter is able to be embedded in the interposer of package and can decrease the noise from the external side to...
The Neural Engineering Framework (NEF) is a theory for mapping computations onto biologically plausible networks of spiking neurons. This theory has been applied to a number of neuromorphic chips. However, within both silicon and real biological systems, synapses exhibit higher-order dynamics and heterogeneity. To date, the NEF has not explicitly addressed how to account for either feature. Here,...
The growing complexity of todays technical systems demands for improved simulation techniques. One important aspect is the way how hierarchy of interconnected dynamical systems is handled. Focusing on this, some existing approaches are reviewed and a modified component connection modeling (CCM) framework is introduced. Furthermore, several conceptual considerations of CoSimMA, a modular simulator...
In this paper, we present a scalable physics-based model that accurately predicts the steady-state high-frequency behavior of memristive RF switches. This model is, to the best of our knowledge, the first lumped RF memristor model that includes device parasitics obtained from physical measurements reported in the literature. Furthermore, we propose two topologies (series and shunt) for non-volatile...
A highly compact and low power consumption neuromorphic circuit with digital control signals which achieves the functional properties of biological neuron and synapse is proposed in this paper. The excitatory or inhibitory synapse could convert pre-synaptic spikes to current to charge or discharge the neuron. During the presence of the post-synaptic current (PSC), the ring oscillator (RO) based neuron...
In this paper, a closed-form physics-based surface potential approach is proposed to derive a compact model for current in high-frequency and high-power LDMOS transistors. For this purpose, we have modeled the drift region with three variable resistors. Effects of velocity saturation in the channel as well as the quasi-saturation due to the existence of the N-Drift region have been taken into account...
Silicon Interposers enable very high routing density in between integrated circuits (ICs) that are fabricated in different technologies like 65 nm for power amplifiers and 14 nm FinFET for highest performance. This is not possible within a System on Chip (SoC). While heterogeneous silicon interposer integration is now used in the first products for processor-memory-integration, it is still rarely...
The report focuses on the development of a knowledgebase (based on ontology) for automated classification of circuit elements and for finding suitable items under the required specification of the customer. During the development the following methods and technologies were used: knowledge engineering of circuit elements (for example transistors), ontology engineering in Protégé environment, rules...
In this work are presented three algorithms that form part of a platform for analysis and characterization of power quality disturbances in electric distribution systems. In the initial part are presented the fundamentals in that are based some recent works oriented to the optimal location of meters and the relative sags source location in an electric distribution network. The document continues with...
This paper reports on a rectifier with 100 mW class dc output at 5.8 GHz using a gallium nitride (GaN) shottly barrier diode and silicon (Si) matching circuit. The originality of the study lies in its adaptation of the hybrid semiconductor integrated circuit (HySIC) technology that utilizes different types of semiconductors. We have completed the basic steps for developing a rectifier based on the...
Thermal models for simulating heating and cooling of PIN diode and FET-based MRI coil blocking circuits are presented. The temperature dependent parameters in the two basic circuit elements as well as the related SPICE-compatible circuit models are discussed. Impedance versus temperature measurements for both PIN diode and MOSFET are presented that confirm the validity of model usage. A MRI coil blocking...
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