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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 ... -
Practical Design of Fractional-Order Resonator for Application in the Multiphase Oscillator
(IEEE, 2020-11-25)This contribution introduces a new simple electronically adjustable resonator for implementation in design of the fractional-order multiphase oscillator created with parallel connection of this resonator and negative ... -
New Chaotic Oscillator Derived from Class C Single Transistor-Based Amplifier
(Hindawi, 2020-11-06)This paper describes new autonomous deterministic chaotic dynamical system having single unstable saddle-spiral fixed point. Mathematical model originates in the fundamental structure of class C amplifier. Evolution of ... -
Voltage Differencing Current Conveyor Differential Input Transconductance Amplifier: Novel Active Element and Its Resistorless Filtering Application
(IEEE, 2019-10-30)This paper introduces novel modification of active element based on current conveyor transconductance amplifier core abbreviated as current controlled voltage differencing current conveyor differential input transconductance ... -
Electronically Tunable Oscillator Utilizing Reinforced Controllable Parameters
(IEEE, 2019-10-31)This paper presents a novel solution of an oscillator with electronically adjustable oscillation condition (CO) and frequency of oscillations (FO). Oscillation condition is controlled by current gain and frequency 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 ... -
Reconnection-less Reconfigurable Low-Pass Filtering Topology Suitable for Higher-Order Fractional-Order Design
(Elsevier, 2020-09-01)The paper discusses a new design of a current–mode reconnection–less reconfigurable fractional–order (FO) low–pass filter of various orders. The filtering structure is based on a 4th–order leap–frog topology using operational ... -
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 ... -
Comparison of Simple Design Methods for Voltage Controllable Resistance
(IEEE, 2020-04-16)This paper compares several ways of electronic resistance control for tunable applications (filters, oscillators, amplifiers, etc.). Simulation (PSpice) and experimental tests of basic J-FET transistor-based adjustable ... -
Fracmemristor chaotic oscillator with multistable and antimonotonicity properties
(Elsevier, 2020-06-17)Memristor is a non-linear circuit element in which voltage-current relationship is determined by the previous values of the voltage and current, generally the history of the circuit. The nonlinearity in this component can ... -
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) ... -
New Low-Voltage CMOS Differential Difference Amplifier (DDA) and an Application Example
(IEEE, 2018-08-05)The paper presents a newly designed structure of a low-voltage differential difference amplifier (DDA). The novel implementation brings significant reduction of complexity in comparison to readily available operational ... -
Frequency Corrector Using Voltage Differencing Current Conveyor Transconductance Amplifiers
(IEEE, 2019-11-29)This paper brings new type of electronically adjustable bilinear two port (allowing zero, pole and gain adjustment) applied in simple two-band frequency corrector. The bilinear two port employs single current controlled ... -
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 ... -
Conversion of a MISO Filter into its Reconnectionless Reconfigurable Form with Complex Active elements
(IEEE, 2020-04-23)This paper aims to show an easy way how to design a reconnection-less reconfigurable filter based on the modification of an existing MISO filter. The proposed filter offers the same transfer functions as the structure ... -
Psychological Stress Detection in Speech Using Return-to-opening Phase Ratios in Glottis
(Kaunas University of Technology, 2015-10-12)This paper is focused on investigation of psychological stress in speech signal using shapes of normalised glottal pulses. The pulses were estimated by two algorithms: the Direct Inverse Filtering and Iterative and Adaptive ...