Посмотр 2013/1 по дате публикации
Отображаемые элементы 1-20 из 52
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A Box-Counting Method with Adaptable Box Height for Measuring the Fractal Feature of Images
(Společnost pro radioelektronické inženýrství, 2013-04)Most of the existing box-counting methods for measuring fractal features are only applicable to square images or images with each dimension equal to the power of 2 and require that the box at the top of the box stack of ... -
A Novel Three-Point Modulation Technique for Fractional-N Frequency Synthesizer Applications
(Společnost pro radioelektronické inženýrství, 2013-04)This paper presents a novel three-point modulation technique for fractional-N frequency synthesizer applications. Convention modulated fractional-N frequency synthesizers suffer from quantization noise, which degrades not ... -
A Dual-Band Circularly-Polarized Patch Antenna with a Novel Asymmetric Slot for WiMAX Application
(Společnost pro radioelektronické inženýrství, 2013-04)A compact design of a circularly-polarized (CP) microstrip antenna to achieve dual-band behavior for WiMAX applications is presented. A single-layered feed is used to excite a single square patch integrated with a novel ... -
High Current Matching over Full-Swing and Low-Glitch Charge Pump Circuit for PLLs
(Společnost pro radioelektronické inženýrství, 2013-04)A high current matching over full-swing and low-glitch charge pump (CP) circuit is proposed. The current of the CP is split into two identical branches having one-half the original current. The two branches are connected ... -
Interest Points as a Focus Measure in Multi-Spectral Imaging
(Společnost pro radioelektronické inženýrství, 2013-04)A novel multi-spectral focus measure that is based on algorithms for interest point detection, particularly on the FAST (Features from Accelerated Segment Test), Fast Hessian and Harris-Laplace detector, is described in ... -
A Hybrid 3D Learning-and-Interaction-based Segmentation Approach Applied on CT Liver Volumes
(Společnost pro radioelektronické inženýrství, 2013-04)Medical volume segmentation in various imaging modalities using real 3D approaches (in contrast to slice-by-slice segmentation) represents an actual trend. The increase in the acquisition resolution leads to large amount ... -
Design and Modeling of Symmetric Three Branch Polymer Planar Optical Power Dividers
(Společnost pro radioelektronické inženýrství, 2013-04)Two types of polymer-based three-branch symmetric planar optical power dividers (splitters) were designed, multimode interference (MMI) splitter and triangular shape-spacing splitter. By means of modeling the real structures ... -
3D Energy Harvester Evaluation
(Společnost pro radioelektronické inženýrství, 2013-04)This paper discusses the characterization and evaluation of an MEMS based electrostatic generator, a part of the power supply unit of the self-powered microsystem[1,2,3]. The designed generator is based on electrostatic ... -
Classification of Jaw Bone Cysts and Necrosis via the Processing of Orthopantomograms
(Společnost pro radioelektronické inženýrství, 2013-04)The authors analyze the design of a method for automatized evaluation of parameters in orthopantomographic images capturing pathological tissues developed in human jaw bones. The main problem affecting the applied medical ... -
Comparison of the Intrinsic Characteristics of LTCC and Silicon Pressure Sensors by Means of 1/f Noise Measurements
(Společnost pro radioelektronické inženýrství, 2013-04)A pressure sensor with high resolution is of key importance for precise measurements in the low-pressure range. The intrinsic resolution of piezoresistive ceramic pressure sensors (CPSs) mainly depends on their func¬tional ... -
A Novel Second-Order All-Pass Filter Using Square-Root Domain Blocks
(Společnost pro radioelektronické inženýrství, 2013-04)In this study, a new second order all-pass filter is synthesized in the square-root domain by using the state-space method. The proposed second order all-pass filter is constituted by current mirrors, current sources, ... -
0.5V 3rd-order Tunable gm-C Filter
(Společnost pro radioelektronické inženýrství, 2013-04)This paper proposes a 3rd-order gm-C filter that operates with the extremely low voltage supply of 0.5V. The employed transconductor is capable for operating in an extremely low voltage power supply environment. A benefit ... -
A Compact and Wideband Coupled-Line Coupler with High Coupling Level Using Shunt Periodic Stubs
(Společnost pro radioelektronické inženýrství, 2013-04)A wideband microstrip forward-wave coupled-line coupler with high coupling value is presented. Compared with the conventional edge-coupled microstrip forward-wave coupler, this symmetrical structure, consisting periodic ... -
A New Low Complexity Uniform Filter Bank Based on the Improved Coefficient Decimation Method
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper, we propose a new uniform filter bank (FB) based on the improved coefficient decimation method (ICDM). In the proposed FB’s design, the ICDM is used to obtain different multi-band frequency responses using a ... -
Trap-Assisted Tunneling in the Schottky Barrier
(Společnost pro radioelektronické inženýrství, 2013-04)The paper presents a new way how to calculate the currents in a Schottky barrier. The novel phenomeno-logical model extends the Shockley-Read-Hall recombi-nation-generation theory of trap-assisted tunneling. The proposed ... -
3D Reconstruction: Novel Method for Finding of Corresponding Points using Pseudo Colors
(Společnost pro radioelektronické inženýrství, 2013-04)This paper deals with the reconstruction of spatial coordinates of an arbitrary point in a scene using two images scanned by a 3D camera or two displaced cameras. Calculations are based on the perspective geom-etry. Accurate ... -
Operational Trans-Resistance Amplifier Based Tunable Wave Active Filter
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper, Operational Trans-Resistance Amplifier (OTRA) based wave active filter structures are presented. They are flexible and modular, making them suitable to implement higher order filters. The circuits implement ... -
Multiobjective Optimization for Electronic Circuit Design in Time and Frequency Domains
(Společnost pro radioelektronické inženýrství, 2013-04)The multiobjective optimization provides an extraordinary opportunity for the finest design of electronic circuits because it allows to mathematically balance contradictory requirements together with possible constraints. ... -
Low-Voltage MOS Current Mode Logic Multiplexer
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper, a new low-voltage MOS current mode logic (MCML) multiplexer based on the triple-tail cell concept is proposed. An analytical model for static parameters is formulated and is applied to develop a design ... -
Thick-Film and LTCC Passive Components for High-Temperature Electronics
(Společnost pro radioelektronické inženýrství, 2013-04)At this very moment an increasing interest in the field of high-temperature electronics is observed. This is a result of development in the area of wide-band semiconductors’ engineering but this also generates needs for ...