Comparison of Two Solutions of Quadrature Oscillators With Linear Control of Frequency of Oscillation Employing Modern Commercially Available Devices. - Roman Sotner; Jan Jerabek; Lukas Langhammer; Josef Polak; Norbert Herencsar; Roman Prokop; Jiri Petrzela; Winai Jaikla (Circuits Syst. Signal Process., 2015)

Electronically tunable fractional-order low-pass filter with current followers. - Jan Dvorak; Lukas Langhammer; Jan Jerabek; Jaroslav Koton; Roman Sotner; Josef Polak (TSP, 2016)

Fractional-order low-pass filter with electronically adjustable parameters. - Jan Jerabek; Roman Sotner; David Kubánek; Jan Dvorak; Lukas Langhammer; Norbert Herencsar; Kamil Vrba (TSP, 2016)

Single active parameter tunable simple band-pass filter: Methods for tunability range extension. - Roman Sotner; Jiri Petrzela; Ondrej Domansky; Lukas Langhammer; Tomás Dostál (MIXDES, 2017)

A 1+α Low-Pass Fractional-Order Frequency Filter with Adjustable Parameters. - Lukas Langhammer; Roman Sotner; Jan Dvorak; Ondrej Domansky; Jan Jerabek; Jiri Uher (TSP, 2017)

Resistor-Less Single-Purpose or Reconfigurable Biquads Utilizing Single z-Copy Controlled-Gain Voltage Differencing Current Conveyor. - Jan Jerabek; Roman Sotner; Josef Polak; Lukas Langhammer; Norbert Herencsar; Roman Prokop; Kamil Vrba (J. Circuits Syst. Comput., 2017)

Non-Integer-Order Low-Pass Filter with Electronically Controllable Parameters. - Jan Dvorak; Zuzana Polesakova; Jan Jerabek; Lukas Langhammer; Aslihan Kartci; Jaroslav Koton (ISCAS, 2018)

Fully-Differential Universal Frequency Filter with Dual-Parameter Control of the Pole Frequency and Quality Factor. - Lukas Langhammer; Roman Sotner; Jan Dvorak; Jan Jerabek; Miroslav Zapletal (ISCAS, 2018)

On Advanced Current Conveyor Applications Having Capacitor Connected to Current Input Terminal. - Roman Sotner; Jiri Petrzela; Jan Jerabek; Lukas Langhammer; Tomás Dostál (MIXDES, 2018)

New Reconfigurable Universal SISO Biquad Filter Implemented by Advanced CMOS Active Elements. - Roman Sotner; Lukas Langhammer; Ondrej Domansky; Jiri Petrzela; Jan Jerabek; Tomás Dostál (SMACD, 2018)

Reconfigurable Impedance Converter for Synthesis of Integer and Fractional-Order Synthetic Elements. - Ondrej Domansky; Roman Sotner; Lukas Langhammer (TSP, 2018)

Design of Fully-Differential Frequency Filter with Fractional-Order Elements. - Jan Dvorak; Jan Jerabek; Lukas Langhammer; Stavroula Kapoulea; Costas Psychalinos (TSP, 2018)

Modification of Current Follower/Amplifier with Controllable Intrinsic Resistance. - Lukas Langhammer; Roman Sotner; Jan Dvorak (TSP, 2018)

Reconnection-less Reconfigurable Filter and its Application into Adaptive Circuit. - Roman Sotner; Jan Jerabek; Jiri Petrzela; Lukas Langhammer; Ondrej Domansky; Winai Jaikla; Tomás Dostál (TSP, 2018)

Synthesis and Analysis of Electronically Adjustable Fractional-Order Low-Pass Filter. - Jan Dvorak; Lukas Langhammer; Jan Jerabek; Jaroslav Koton; Roman Sotner; Josef Polak (J. Circuits Syst. Comput., 2018)

Novel Electronically Reconfigurable Filter and Its Fractional-Order Counterpart. - Lukas Langhammer; Roman Sotner; Jan Dvorak; Jan Jerabek; Peter A. Ushakov (ICECS, 2019)

Frequency Corrector Using Voltage Differencing Current Conveyor Transconductance Amplifiers. - Roman Sotner; Jiri Petrzela; Jan Jerabek; Lukas Langhammer (ICECS, 2019)

Electronically Tunable Oscillator Utilizing Reinforced Controllable Parameters. - Lukas Langhammer; Roman Sotner; Ondrej Domansky (ICUMT, 2019)

Voltage Differencing Current Conveyor Differential Input Transconductance Amplifier: Novel Active Element and Its Resistorless Filtering Application. - Roman Sotner; Jan Jerabek; Lukas Langhammer; Jiri Petrzela; Winai Jaikla; Sunti Tuntrakool (ICUMT, 2019)

Electronically Controllable Audio Equalizers Based on Bilinear Immittances Utilizing CMOS Voltage Differencing Current Conveyor. - Roman Sotner; Jan Jerabek; Serdar Özoguz; David Kubánek; Lukas Langhammer (ISCAS, 2019)

Novel Design Solution of Reconnection-less Electronically Reconfigurable Filter. - Lukas Langhammer; Roman Sotner; Jan Dvorak; Tomás Dostál (MIXDES, 2019)

Fractional-Order Asymptotical Phase Shifter with Flat Magnitude Response. - Roman Sotner; Lukas Langhammer; Jan Jerabek; Tomás Dostál (NEWCAS, 2019)

Practical Design of RC Approximants of Constant Phase Elements and Their Implementation in Fractional-Order PID Regulators Using CMOS Voltage Differencing Current Conveyors. - Ondrej Domansky; Roman Sotner; Lukas Langhammer; Jan Jerabek; Costas Psychalinos; Georgia Tsirimokou (Circuits Syst. Signal Process., 2019)

Current-Mode Fractional-Order Electronically Controllable Integrator Design. - Lukas Langhammer; Roman Sotner; Jan Dvorak; Ondrej Sladok; Jan Jerabek; Panagiotis Bertsias (ICECS, 2020)

Tunable Fractional-Order Capacitance Multiplier Using Current Gain Adjustment. - Roman Sotner; Jan Jerabek; Lukas Langhammer (ICECS, 2020)

Practical Design of Fractional-Order Resonator for Application in the Multiphase Oscillator. - Roman Sotner; Jan Jerabek; Lukas Langhammer; Aslihan Kartci; Norbert Herencsar; Bilgin Metin (ICECS, 2020)

Third-Order Reconnection-Less Electronically Reconfigurable Multifunctional Filter. - Lukas Langhammer; Roman Sotner (ISCAS, 2020)

Conversion of a MISO Filter into its Reconnection-less Reconfigurable Form with Complex Active elements. - Lukas Langhammer; Roman Sotner (RADIOELEKTRONIKA, 2020)

Comparison of Simple Design Methods for Voltage Controllable Resistance. - Roman Sotner; Ondrej Domansky; Lukas Langhammer; Jiri Petrzela (RADIOELEKTRONIKA, 2020)

Design of Electronically Adjustable Fractional Order Immittances Using Single Active Device. - Roman Sotner; Jan Jerabek; Lukas Langhammer; Jaroslav Koton; Darius Andriukaitis; Audrius Merfeldas (TSP, 2020)

Design of Building Blocks for Fractional-Order Applications with Single and Compact Active Device. - Roman Sotner; Jan Jerabek; Lukas Langhammer; Jaroslav Koton; Josef Polak; Darius Andriukaitis; Algimantas Valinevicius (TSP, 2020)

Voltage Tunable Building Blocks Using Compact Active Device in Design of Filtering Applications. - Roman Sotner; Jiri Petrzela; Lukas Langhammer (RADIOELEKTRONIKA, 2021)

Electronically Reconfigurable and Tunable Fractional-Order Filter Using Resonator Concept and Feedforward Path for Low-Frequency Tone Signalization. - Ondrej Domansky; Roman Sotner; Lukas Langhammer; Ladislav Polak (IEEE Access, 2021)

Reconnection-less Reconfigurable Fractional-Order Current-Mode Integrator Design With Simple Control. - Lukas Langhammer; Roman Sotner; Jan Dvorak; Jan Jerabek; Darius Andriukaitis (IEEE Access, 2021)

Electronic Tunability and Cancellation of Serial Losses in Wire Coils. - Roman Sotner; Jan Jerabek; Ladislav Polak; Radek Theumer; Lukas Langhammer (Sensors, 2022)

Reconnection-Less Reconfigurable Filter Based on Method of Unknown Nodal Voltages Using 4×4 Matrix. - Lukas Langhammer; Roman Sotner (IEEE Access, 2023)

Various-Order Low-Pass Filter with the Electronic Change of Its Approximation. - Lukas Langhammer; Roman Sotner; Radek Theumer (Sensors, 2023)

Comparison of Analytical and Algorithm-Based Design of Two-Port Using Two Bilinear Sections. - Dmitrii Semenov; Roman Sotner; Ladislav Polak; Jan Jerabek; Jiri Petrzela; Lukas Langhammer (IEEE Access, 2024)

1 V Electronically Tunable Differential Difference Current Conveyors Using Multiple-Input Operational Transconductance Amplifiers. - Montree Kumngern; Fabian Khateb; Tomasz Kulej; Lukas Langhammer (Sensors, 2024)