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New double current controlled CFA (DCC-CFA) based voltage-mode oscillator with independent electronic control of oscillation condition and frequency
(FEI STU, 2013-03-27)In this paper, a new electronically tunable quadrature oscillator (ETQO) based on two modified versions of current feedback amplifiers (CFAs), the so called double current controlled CFA (DCC-CFAs) is presented. The frequency ... -
Analog Multipliers-Based Double Output Voltage Phase Detector for Low-Frequency Demodulation of Frequency Modulated Signals
(IEEE, 2021-06-25)This work deals with the design of a simple double output voltage phase detector, using a specific type of analog multiplier, and its application in a frequency demodulator. The design of active parts was performed in ... -
A Single Parameter Voltage Adjustable Immittance Topology for Integer- and Fractional-Order Design Using Modular Active CMOS Devices
(IEEE, 2021-05-17)A simple single parameter adjustable immittance concept designed with modular active devices, fabricated in I3T 25 0.35 um 3.3 V CMOS process of ON Semiconductor, is introduced. The proposed devices employ an integer-order ... -
Chaotic and hyperchaotic self-oscillations of lambda diode composed by generalized bipolar transistors
(MDPI, 2021-04-07)This paper is focused on the investigation of self-oscillation regimes associated with very simple structure of lambda diode. This building block is constructed by using coupled generalized bipolar transistors. In the stage ... -
Evidence of strange attractors in class C amplifier with single bipolar transistor: polynomial and piecewise-linear case
(MDPI, 2021-01-30)This paper presents and briefly discusses recent observations of dynamics associated with isolated generalized bipolar transistor cells. A mathematical model of this simple system is considered on the highest level of ... -
Hyperchaotic self-oscillations of two-stage class C amplifier with generalized transistors
(IEEE, 2021-04-22)This paper yields process of development, numerical analysis, lumped circuit modeling, and experimental verification of a new hyperchaotic oscillator based on the fundamental topology of two-stage amplifier. Analyzed network ... -
Electrical Source Imaging in Freely Moving Rats: Evaluation of a 12-Electrode Cortical Electroencephalography System
(Frontiers, 2021-01-25)This work presents and evaluates a 12-electrode intracranial electroencephalography system developed at the National Institute of Mental Health (Klecany, Czech Republic) in terms of an electrical source imaging (ESI) ... -
Practical design of Ku band Vivaldi antenna array
(SLOVAK UNIV TECHNOLOGY, 2020-10-01)In the paper, a practical design of a Ku-band Vivaldi antenna array for compact radar system is presented. The realized gain, the beam width, polarization purity and the possible electronic beamforming in the horizontal ... -
Rat Head Phantom for Testing of Electroencephalogram Source Localization Techniques
(IEEE, 2020-06-08)In this paper we report a new rat head phantom developed for testing electroencephalogram source localization techniques. The phantom is composed of an agar based mixture mimicking the rat brain, six dipoles and fourteen ... -
Cagniard-DeHoop Technique-Based Computation of Retarded Partial Coefficients: The Coplanar Case
(IEEE, 2020-08-13)Efficient computation of partial elements plays a key role in the Partial Element Equivalent Circuit (PEEC) method. A novel analytical method for computing retarded partial coefficients based on the Cagniard-DeHoop (CdH) ... -
Gradient-Index-Based Frequency-Coded Retroreflective Lenses for mm-Wave Indoor Localization
(IEEE, 2020-11-23)This article introduces retroreflective lenses for millimeter-wave radio-frequency indoor localization. A three-dimensional (3D) gradient-index Luneburg lens is employed to increase radar cross section (RCS) of photonic-crystal ... -
All Pinched Hysteresis Loops Generated by (alpha, beta) Elements: in What Coordinates They May be Observable
(IEEE, 2020-12-01)Two existing theorems for studying pinched hysteresis loops generated by nonlinear higher-order elements from Chua's table are reformulated, namely the generalized homothety theorem and the associated Loop Location Rule, ... -
Current–Mode Fractional–Order Electronically Controllable Integrator Design
(IEEE, 2020-11-25)This contribution presents a design of a current–mode fractional–order electronically controllable integrator which can be used as a building block for a design of fractional–order (FO) circuits. The design is based on a ... -
Wavelet Co-movement Significance Testing with Respect to Gaussian White Noise Background
(Helenic Military Academy, 2018-01-09)The paper deals with significance testing of time series co-movement measured via time-frequency approach. We use the wavelet analysis for estimation of the co/cross-spectra for the co-movement analysis. This technique is ... -
(V)TEAM for SPICE Simulation of Memristive Devices With Improved Numerical Performance
(IEEE, 2021-02-25)The paper introduces a set of models of memristive devices for a reliable, accurate and fast analysis of large networks in the SPICE (Simulation Program with Integrated Circuit Emphasis) environment. The modeling starts ... -
Digitally-Compensated Wideband 60 GHz Test-Bed for Power Amplifier Predistortion Experiments
(MDPI, 2021-02-20)Millimeter waves will play an important role in communication systems in the near future. On the one hand, the bandwidths available at millimeter-wave frequencies allow for elevated data rates, but on the other hand, the ... -
On the performance of electronically tunable fractional-order oscillator using grounded resonator concept
(Elsevier, 2021-02-20)Recent works target the design of fractional-order oscillators. However, some features of such circuits are not frequently considered in the design despite their importance in practice. This work provides an analysis of ... -
Implementation of the equivalent temperature measurement system as a part of the vehicle Heating, ventilation and Air-conditioning unit
(BioMed Central, 2015-06-29)Thermal comfort evaluation based on the Comfort zone diagram is relatively new and promising method [1] developed by Hkan O. Nilsson [2]. The method was developed mainly for non uniform indoor environments [3] such as ... -
Optimized Design of OTA-Based Gyrator Realizing Fractional-Order Inductance Simulator: A Comprehensive Analysis
(MDPI, 2021-01-01)A detailed analysis of an operational transconductance amplifier based gyrator implementing a fractional-order inductance simulator is presented. The influence of active element non-ideal properties on the gyrator operation ... -
Tunable Fractional-Order Capacitance Multiplier Using Current Gain Adjustment
(IEEE, 2020-11-25)This paper brings new solution of linearly adjustable fractional-order capacitance multiplier. The adjustable current gain, linear in wide range of input current and with linear dependence on driving voltage, serves for ...
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