Browsing Ústav radioelektroniky by Issue Date
Now showing items 1-20 of 50
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Electronically adjustable mixed-mode implementations of the jerk functions
(Hikari Ltd., 2009-06-22)In this paper the several structures of the third-order nonlinear oscillator with electronically adjustable parameters are presented. A brief numerical analysis including the computation of the largest Lyapunov exponent ... -
Current-Mode Circuits Based on SIMO OTA: Review and New Applications in Filters
(Hikari, 2009-11-06)The paper deals with design of low-order RC filters working in current mode (CM). As the basic building blocks, transconductors (OTA) with single input and multiple outputs are used. One-loop, two-loop and multi-loop ... -
An Additional Approach to Model Current Followers and Amplifiers with Electronically Controllable Parameters from Commercially Available ICs
(Versita, 2012-11-22)Several behavioral models of current active elements for experimental purposes are introduced in this paper. These models are based on commercially available devices. They are suitable for experimental tests of current- ... -
New resistorless tunable voltage-mode universal filter using single VDIBA
(Springer, 2013-08-01)To increase the universality of the recently introduced voltage differencing inverting buffered amplifier (VDIBA), this letter presents a new voltage-mode (VM) multi-input–single-output (MISO) universal filter. The proposed ... -
TISO Adjustable Filter with Controllable Controlled-Gain Voltage Differencing Current Conveyor
(Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, 2014-06-02)The main aim of this paper is to present solution of triple-input single-output (TISO) filter with independently adjustable pole frequency, quality factor, bandwidth and also gain. Filter is universal, operates in current ... -
Dynamical Tangles in Third-Order Oscillator with Single Jump Function
(Hindawi, 2014-09-18)This contribution brings a deep and detailed study of the dynamical behavior associated with nonlinear oscillator described by a single third-order differential equation with scalar jump nonlinearity. The relative primitive ... -
In-vehicle channel sounding in the 5.8-GHz band
(Springer, 2015-03-10)The article reports vehicular channel measurements in the frequency band of 5.8 GHz for IEEE 802.11p standard. Experiments for both intra-vehicle and out-of-vehicle environments were carried out. It was observed that the ... -
Study of Small-signal Model of Simple CMOS Amplifier with Instability Compensation of Positive Feedback Loop
(De Gruyter Open, 2015-07-06)The paper deals with precise analysis of simple AC variable gain CMOS amplifier. The circuit can be used as a simple voltage follower (6 MOS transistors are required) or amplifier. The main attention of this work is focused ... -
Novel first-order all-pass filter applications of z-copy voltage differencing current conveyor
(NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR), 2015-08-05)The application of z-copy voltage differencing current conveyor (ZC-VDCC) in simple and interesting first-order all-pass sections has been studied in the present paper. The solutions presented here have presumptions for ... -
Design of the simple oscillator with linear tuning and pi/4 phase shift based on emulator of the modified current differencing unit
(The Institute of Electronics, Information and Communication Engineers (IEICE), 2015-10-10)This paper presents a simple oscillator with 45 degrees phase shift between output signals. A Modified current Differencing Unit (MCDU) was used for its design. The MCDU offers controllability of input resistances ... -
Behavioral model for emulation of ZC-CG-VDCC
(The Institute of Electronics, Information and Communication Engineers (IEICE), 2016-01-29)This paper presents a proposal and an experimental analysis of behavioral emulator of so-called z-copy controlled-gain voltage differencing current conveyor (ZC-CG-VDCC) based on commercially available devices. Most of ... -
The RF Energy Harvesting Antennas Operating in Commercially Deployed Frequency Bands: A Comparative Stud
(Hindawi Publishing Corporation, 2016-04-06)This paper deals with suitable antennas for energy harvesting, which is a growing research field due to the utilization of nowa-days ubiquitous and abundant RF energy. Four types of basic antenna structures suitable for ... -
Simple Oscillator with Enlarged Tunability Range Based on ECCII and VGA Utilizing Commercially Available Analog Multiplier
(De Gruyter, 2016-04-07)This work presents an example of implementation of electronically controllable features to an originally unsuitable circuit structure of oscillator. Basic structure does not allow any electronic control and has mutually ... -
Nanoelectronic COupled problems solutions - nanoCOPS: modelling, multirate, model order reduction, uncertainty quantification, fast fault simulation
(2016-07-14)The FP7 project nanoCOPS derives new methods for simulation during development of designs of integrated products. It covers advanced simulation techniques for electromagnetics with feedback couplings to electronic circuits, ... -
Out-of-vehicle time-of-arrival-based localization in ultra-wide band
(SAGE, 2016-07-19)The article presents out-of-vehicle channel measurement results in ultra-wide band spanning 3–11 GHz bandwidth using a vector network analyzer for localization applications. Experiments for different distances and different ... -
Digitally Controllable Current Amplifier and Current Conveyors in Practical Application of Controllable Frequency Filter
(Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, 2016-09-04)This paper presents the simulations results in comparison with the measured results of the practical realization of the multifunctional second order frequency filter with a Digitally Controlled Current Amplifier (DACA) and ... -
A CMOS Multiplied Input Differential Difference Amplifier: A New Active Device and Its Applications
(MDPI AG, 2017-01-26)This paper presents a newly developed active device, referred to as a multiplied input differential difference amplifier (MIDDA), which allows operations of summation/subtraction and multiplication of input signals. It was ... -
Reconfigurable Fractional-Order Filter with Electronically Controllable Slope of Attenuation, Pole Frequency and Type of Approximation
(World Scientific Publishing, 2017-03-09)This paper presents design of electronically reconfigurable fractional-order filter that is able to be configured to operate as fractional-order low-pass filter (FLPF) or fractional-order high-pass filter (FHPF). Its slope ... -
Resistor-less Single-purpose or Reconfigurable Biquads Utilizing Single Z-Copy Controlled-Gain Voltage Differencing Current Conveyor
(2017-03-31)Presented work deals with applications of the single Z-Copy Controlled-Gain Voltage Differencing Current Conveyor (ZC-CG-VDCC) in single purpose and multifunctional biquadratic voltage- and current-mode active resistor-less ... -
High input impedance voltage-mode universal filter and its modification as quadrature oscillator using VDDDAs
(NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR), 2017-05-23)The second order universal voltage-mode filter using voltage differencing differential difference amplifiers (VDDDAs) has been proposed. It has high input impedance voltage-mode biquad filter with orthogonal tune of natural ...