2011/1
Browse by
Recent Submissions
-
Reduction of Sidelobes by Nonuniform Elements Spacing of a Spherical Antenna Array
(Společnost pro radioelektronické inženýrství, 2011-04)This paper presents a significant sidelobe reduction if nonuniform elevational spacing of antenna elements on the sphere is used. Antenna elements are progressively phased with a uniform amplitude excitation. The calculation ... -
Voltage-Controlled Floating Resistor Using DDCC
(Společnost pro radioelektronické inženýrství, 2011-04)This paper presents a new simple configuration to realize the voltage-controlled floating resistor, which is suitable for integrated circuit implementation. The proposed resistor is composed of three main components: MOS ... -
Current Gain Controlled CCTA and its Application in Quadrature Oscillator and Direct Frequency Modulator
(Společnost pro radioelektronické inženýrství, 2011-04)A modified conception of adjustable current conveyor transconductance amplifier (CCTA) and its interesting application in simple quadrature oscillator expandable for direct frequency modulation purposes, employing only ... -
A New Low-Power CMOS Quadrature VCO with Current Reused Structure
(Společnost pro radioelektronické inženýrství, 2011-04)A new quadrature voltage controlled oscillator (QVCO) circuit topology is proposed for low-voltage and low-power applications. In the proposed circuit, two oscillators with current-reused structure are coupled to each other ... -
Arbitrary Shape Electromagnetic Transparent Device Based on Laplace’s Equation
(Společnost pro radioelektronické inženýrství, 2011-04)Transparent device is deliberately-designed electromagnetic structure that is transparent to electromagnetic wave. It can be used as a radome structure which is capable of protection antenna inside without sacrificing its ... -
Switched Capacitor Realizations of Fractional-Order Differentiators and Integrators Based on an Operator with Improved Performance
(Společnost pro radioelektronické inženýrství, 2011-04)In this paper, switched capacitor realizations of discretized models of half differentiator and half integrator based on a new operator with improved performance have been proposed. This Al-Hsue operator is the weighted ... -
Coaxial Filters Optimization Using Tuning Space Mapping in CST Studio
(Společnost pro radioelektronické inženýrství, 2011-04)This paper deals with the optimization of coaxial filters using Tuning Space Mapping (TSM) method implemented to CST environment. The function of fine and coarse model and their link between each other is explained. In ... -
Insertion Loss Estimation of EMI Filters in Unmatched Input/Output Impedance System
(Společnost pro radioelektronické inženýrství, 2011-04)One of the problems in the design of powerline EMI filters is the uncertainty and ambiguity of their source/load impedances which results in breach of expected filter parameters in a real installation. The paper presents ... -
Mutual Coupling Between IFF/SSR Microstrip Antennas with Reduced Transversal Size - Experimental Study
(Společnost pro radioelektronické inženýrství, 2011-04)Mutual coupling between IFF/SSR microstrip antennas is investigated experimentally in this paper. At the begining configuration and performance of isolated microstrip antenna fed by H-shaped coupling slot is presented. ... -
Electronically Controllable Grounded Capacitor Current-Mode Quadrature Oscillator using single MO-CCCDTA
(Společnost pro radioelektronické inženýrství, 2011-04)This paper presents an electronically controllable grounded capacitor quadrature oscillator using single multiple-output current controlled current differencing transconductance amplifier (MO-CCCDTA) as an active element. ... -
Novel Designed CSRRs and Its Application in Tunable Tri-Band Bandpass Filter Based on Fractal Geometry
(Společnost pro radioelektronické inženýrství, 2011-04)In this paper, we propose and research a novel miniaturized composite right/left handed transmission line (CRLH TL) cell based on revised complementary split ring resonators (CSRRs) for the first time. Novel CRLH TL cell ... -
Deriving (MO)(I)CCCII Based Second-order Sinusoidal Oscillators with Non-interactive Tuning Laws using State Variable Method
(Společnost pro radioelektronické inženýrství, 2011-04)The paper discusses systematic realization of second-order sinusoidal oscillators using multiple-output second-generation current controlled conveyor (MO-CCCII) and/or its inverting equivalent, namely the multiple-output ... -
Four-Phase Oscillators Employing Two Active Elements
(Společnost pro radioelektronické inženýrství, 2011-04)Two novel four-phase voltage-output oscillators are proposed. These circuits can also be utilized as quadrature oscillators with floating outputs. Each oscillator employs two DO-CIBA (Differential Output- Current Inverter ... -
Development in Electronic Packaging – Moving to 3D System Configuration
(Společnost pro radioelektronické inženýrství, 2011-04)The electronic industry is reducing package dimensions of components as well as complete electronics systems. Surface mount device passives and semiconductor chips have to be mounted together bringing a functional system ... -
Behavioral Modeling of Memcapacitor
(Společnost pro radioelektronické inženýrství, 2011-04)Two behavioral models of memcapacitor are developed and implemented in SPICE-compatible simulators. Both models are related to the charge-controlled memcapacitor, the capacitance of which is controlled by the amount of ... -
Analysis and Design Procedure of LVLP Sub-bandgap Reference - Development and Results
(Společnost pro radioelektronické inženýrství, 2011-04)This work presents an thorough analysis and design of a low-voltage low-power voltage reference circuit with sub-bandgap output voltage. The outcome of the analysis and the resulting design rules are universal and it is ... -
Topology Reduction for Approximate Symbolic Analysis
(Společnost pro radioelektronické inženýrství, 2011-04)The paper deals with a procedure for approximate symbolic analysis of linear circuits based on simplifying the circuit model. The procedure consists of two main steps. First, network elements whose influence on the circuit ... -
Basic Block of Pipelined ADC Design Requirements
(Společnost pro radioelektronické inženýrství, 2011-04)The paper describes design requirements of a basic stage (called MDAC - Multiplying Digital-to- Analog Converter) of a pipelined ADC. There exist error sources such as finite DC gain of opamp, capacitor mismatch, thermal ... -
Ni and Ni Silicides Ohmic Contacts on N-type 6H-SiC with Medium and Low Doping Level
(Společnost pro radioelektronické inženýrství, 2011-04)Ni silicides contacts, which are expected to be advantageous contact materials on SiC, were tested in this work. Prepared contact structures were ohmic with low contact resistivity approximately 8×10-4 Ω cm2 after annealing ... -
Activation Energy of RTS Noise
(Společnost pro radioelektronické inženýrství, 2011-04)Low frequency noise was measured in silicon MOSFET and GaN and InGaAs based HFET devices with special emphasis on the RTS noise. The RTS (Random Telegraph Signal) dependence on the biasing conditions and temperature was ...
RSS 1.0