Browsing Ústav radioelektroniky by Title
Now showing items 2-21 of 104
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About v-i Pinched Hysteresis of Some Non-Memristive Systems
(Hindawi, 2018-09-24)A special subset of two-terminal elements providing pinched hysteresis loops in the voltage-current plane with the lobe area increasing with the frequency is analysed. These devices are identified as non-memristive systems ... -
Accurate constant phase elements dedicated for audio signal processing
(MDPI, 2019-11-15)This review paper introduces real-valued two-terminal fully passive RC ladder structures of the so-called constant phase elements (CPE). These lumped electronic circuits can be understood as two-terminal elements described ... -
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- ... -
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, ... -
Analog Implementation of Fractional-Order Elements and Their Applications
(2019-06-24)With advancements in the theory of fractional calculus and also with widespread engineering application of fractional-order systems, analog implementation of fractional-order integrators and differentiators have received ... -
Analog Implementation of Fractional-Order Elements and Their Applications
(2019-06-24)With advancements in the theory of fractional calculus and also with widespread engineering application of fractional-order systems, analog implementation of fractional-order integrators and differentiators have received ... -
Analogue Implementation of a Fractional-Order PI^{\lambda} Controller for DC Motor Speed Control
(IEEE, 2019-06-12)In this paper, an approach to design a fractional-order integral operator s(lambda) where -1 < lambda <0, using an analogue technique, is presented. The integrator with a constant phase angle -80.1 degree (i.e. order lambda ... -
Analysis and Verification of Identical-Order Mixed Matrix Fractional-Order Capacitor Networks
(IEEE, 2018-07-02)In the open literature while capacitors are introduced with -90 degrees phase angle, here we described our fabricated polymer composite, mixed matrix, as a fractional-order capacitor (FoC). The effect on phase and ... -
Applications of novel behavioral implementation of a controllable generalized current conveyor
(IEEE, 2018-04-20)This contribution presents a novel modification of a behavioral model for a generalized current conveyor of second generation based on commercially available active devices. This model is suitable for preliminary tests of ... -
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 ... -
Binary Memory Implemented by Using Variable Gain Amplifiers With Multipliers
(IEEE, 2020-11-01)This work describes design process toward fully analogue binary memory where two coupled piecewise-linear (PWL) resistors are implemented using novel network topology with voltage gain amplifiers (VGA). These versatile ... -
Capacitance Multiplier Using Small Values of Multiplication Factors for Adjustability Extension and Parasitic Resistance Cancellation Technique
(IEEE, 2020-08-05)This paper presents a new concept of a capacitance multiplier using the topology of differential voltage buffer and current conveyor, where the capacitor is connected to the current input terminal. The presented topology ... -
CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface
(MDPI, 2018-12-18)This paper presents a simple relaxation generator, suitable for a sensor interface, operating as a transducer of capacitance to frequency/period. The proposed circuit employs a current feedback operational amplifier, ... -
The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications
(MDPI, 2020-08-18)This paper introduces a new current-controlled current-amplifier suitable for precise measurement applications. This amplifier was developed with strong emphasis on linearity leading to low total harmonic distortion (THD) ... -
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 ... -
CMOS-RC Colpitts Oscillator Design Using Floating Fractional-Order Inductance Simulator
(IEEE, 2018-08-05)This paper deals with CMOS fractional-order inductance (FoL) simulator design and its utilization in 2.75th-order Colpitts oscillator providing high frequency of oscillation. The proposed floating FoL is composed of two ... -
Coarse Time Synchronization Utilizing Symmetric Properties of Zadoff-Chu Sequences
(IEEE, 2018-02-19)We demonstrate a novel metric for coarse time synchronization suitable for wireless communication. The novel metric benefits from a symmetry of Zadoff-Chu sequences in the time domain. The time domain symmetry is obtained ... -
Compact MOS-RC Voltage-Mode Fractional-Order Oscillator Design
(IEEE, 2017-09-04)A new voltage-mode fractional-order oscillator, employing in total 12 Metal-Oxide-Semiconductor (MOS) transistors, is introduced in this paper. The proposed circuit is composed of two operational transconductance amplifiers, ... -
Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators
(World Scientific, 2018-02-06)Due to the absence of commercially available fractional-order capacitors and inductors, their implementation can be performed using fractional-order differentiators and integrators, respectively, combined with a ... -
Comparative Study of Op-Amp-based Integrators Suitable for Fractional-Order Controller Design
(IEEE, 2019-07-01)In this paper, a fractional-order capacitor (FOC) of an order = 0.89 (i.e. constant phase angle –80.1 degree) was emulated via Valsa RC network with five branches. The network component values were optimized using modified ...