Rafal Tomasz Dlugosz

Cette personne n’est plus à l’EPFL

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Publications associées (27)

Hardware Implementation Issues of the Neighborhood Mechanism in Kohonen Self Organized Feature Maps

Rafal Tomasz Dlugosz

In this paper, we discuss an important problem of the selection of the neighborhood radius in the learning schemes of the Winner Takes Most Kohonen neural network. The optimization of this parameter is essential in case of hardware realization of the netwo ...

2009

Lukasiewicz Fuzzy Logic Networks and Their Ultra Low Power Hardware Implementation

Rafal Tomasz Dlugosz

In this paper, we propose a new category of current-mode Łukasiewicz OR and AND logic neurons and logic networks and show their ultra low power realization. The introduced circuits can operate with very low input signals that set up the operating point of ...

2009

An Asynchronous Programmable Parallel 2-D Image Filter CMOS IC Based on the Gilbert Multiplier

Rafal Tomasz Dlugosz

A novel analogue power-efficient 2-D programmable finite impulse response image filter is proposed. This solution is based on the current-mode Gilbert-vector-multiplier operating in the weak inversion region, which allows for ultra low power operation. The ...

Insticc-Inst Syst Technologies Information Control & Communication, Avenida D Manuel L, 27A 2 Esquerdo, Setubal, 2910-595, Portugal2009

A New Fast Training Algorithm of the WTM Kohonen Neural Network Implemented for Classification of Biomedical Signals

Rafal Tomasz Dlugosz

A new optimized algorithm for the learning process suitable for hardware implemented Winner Takes Most Kohonen Neural Network (KNN) has been proposed in the paper. In networks of this type a neighborhood mechanism is used to improve the convergence propert ...

2009

Design and Optimization of Operational Amplifiers for SC Systems - a Comparative Study in CMOS 0.8 μm, 0.35 μm, 0.18 μm Technologies

Rafal Tomasz Dlugosz

Design and optimization of a simple but efficient operational amplifier (OA) for switched-capacitor finite impulse response (SC FIR) filters are presented. The main design criteria are: proper characteristics for application in SC FIR filters, simplicity o ...

2009

A Low Power Current-Mode Binary-Tree WTA / LTA Circuit for Kohonen Neural Networks

Rafal Tomasz Dlugosz

A novel current-mode, binary-tree WTA / LTA circuit for application in analog Kohonen neural networks has been presented. In the proposed circuit input currents are first converted to step signals with equal amplitudes and different delays that are proport ...

Technical University of Lodz, Department of Microelectronics & Computer Science2009

Programmable Switched Capacitor Finite Impulse Response Filter with Circular Memory Implemented in CMOS 0.18 μm Technology

Rafal Tomasz Dlugosz

This paper presents a programmable multi-mode finite impulse response (FIR) filter implemented as switched capacitor (SC) technique in CMOS 0.18 μm technology. Intended application of the described circuit is in analog base-band filtering in GSM/WCDMA syst ...

Springer Verlag2008

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