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CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface 

Polák, Ladislav; Šotner, Roman; Petržela, Jiří; Jeřábek, Jan (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, ...
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Design of Signal Generators Using Active Elements Developed in I3T25 CMOS Technology Single IC Package for Illuminance to Frequency Conversion 

Šotner, Roman; Jeřábek, Jan; Polák, Ladislav; Kledrowetz, Vilém; Prokop, Roman (MDPI, 2020-02-21)
This paper presents a compact and simple design of adjustable triangular and square wave functional generators employing fundamental cells fabricated on a single integrated circuit (IC) package. Two solutions have ...
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Integer- and Fractional-Order VCO Using Non-Inertial Amplitude Stabilization and Modern Active Elements 

Šotner, Roman; Petržela, Jiří; Jeřábek, Jan; Langhammer, Lukáš; Polák, Josef; Jaikla, Winai; Tuntrakool, Sunti (Kaunas University of Technology, 2020-04-25)
This paper introduces design of the linearly tunable quadrature voltage-controlled oscillator (VCO) using modern off-the-shelf active elements suitable for the design of electronically adjustable applications. The simplified ...
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Practical Design of Fractional-Order Oscillator Employing Simple Resonator and Negative Resistor 

Šotner, Roman; Jeřábek, Jan; Domanský, Ondřej; Herencsár, Norbert; Kartci, Aslihan; Dvořák, Jan (IEEE, 2018-11-08)
This contribution presents straightforward design of a fractional-order oscillator employing novel simple impedance inverter (implementing differential voltage current conveyor transconductance amplifier as active element) ...
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Design of the simple oscillator with linear tuning and pi/4 phase shift based on emulator of the modified current differencing unit 

Šotner, Roman; Jeřábek, Jan; Herencsár, Norbert; Vrba, Kamil (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 ...
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Integrated Building Cells for a Simple Modular Design of Electronic Circuits with Reduced External Complexity: Performance, Active Element Assembly, and an Application Example 

Šotner, Roman; Jeřábek, Jan; Polák, Ladislav; Prokop, Roman; Kledrowetz, Vilém (MDPI, 2019-05-22)
This paper introduces new integrated analog cells fabricated in a C035 I3T25 0.35-m ON Semiconductor process suitable for a modular design of advanced active elements with multiple terminals and controllable features. We ...
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Study of Small-signal Model of Simple CMOS Amplifier with Instability Compensation of Positive Feedback Loop 

Šotner, Roman; Jeřábek, Jan; Herencsár, Norbert; Vrba, Kamil; Lahiri, Abhirup; Dostál, Tomáš (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 ...
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Novel first-order all-pass filter applications of z-copy voltage differencing current conveyor 

Šotner, Roman; Herencsár, Norbert; Jeřábek, Jan; Vrba, Kamil; Dostál, Tomáš; Jaikla, Winai; Metin, Bilgin (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 ...
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Digitally Controllable Current Amplifier and Current Conveyors in Practical Application of Controllable Frequency Filter 

Polák, Josef; Jeřábek, Jan; Langhammer, Lukáš; Šotner, Roman; Dvořák, Jan; Pánek, David (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 ...
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TISO Adjustable Filter with Controllable Controlled-Gain Voltage Differencing Current Conveyor 

Jeřábek, Jan; Šotner, Roman; Vrba, Kamil (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 ...
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Jeřábek, Jan (42)
Šotner, Roman (39)Herencsár, Norbert (17)Langhammer, Lukáš (16)Dvořák, Jan (13)Petržela, Jiří (10)Vrba, Kamil (8)Dostál, Tomáš (7)Polák, Josef (6)Polák, Ladislav (6)... View MoreSubjectelectronic control (11)fractional-order (6)Constant phase element (5)elektronické řízení (5)operational transconductance amplifier (4)oscillator (4)adjustable current amplifier (3)current mode (3)electronic tuning (3)Fractional-order (3)... View MoreDate Issued2021 (1)2020 (11)2019 (11)2018 (7)2017 (3)2016 (4)2015 (3)2014 (1)2012 (1)

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