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)

Practically implemented electronically controlled CMOS voltage differencing current conveyor. - Roman Sotner; Jan Jerabek; Roman Prokop; Vilem Kledrowetz; Josef Polak; Lukas Fujcik; Tomás Dostál (MWSCAS, 2016)

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

Reconfigurable Fractional-Order Filter with Electronically Controllable Slope of Attenuation, Pole Frequency and Type of Approximation. - Jan Jerabek; Roman Sotner; Jan Dvorak; Josef Polak; David Kubánek; Norbert Herencsar; Jaroslav Koton (J. Circuits Syst. Comput., 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)

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)

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)