caa a22 4500 606206647 CHVBK 20210128101012.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00034-015-0015-7 doi (NATIONALLICENCE)springer-10.1007/s00034-015-0015-7 Comparison of Two Solutions of Quadrature Oscillators With Linear Control of Frequency of Oscillation Employing Modern Commercially Available Devices [Elektronische Daten] [Roman Sotner, Jan Jerabek, Lukas Langhammer, Josef Polak, Norbert Herencsar, Roman Prokop, Jiri Petrzela, Winai Jaikla] This paper proposes two circuits of frequency-controlled oscillators, whose structures are based only on simple commercially available active elements with minimum number of terminals, in particular, the differential voltage buffer, controllable voltage amplifier and electronically controllable current conveyor. Two methods for achieving linear control (tuning) of frequency of oscillations (FO) are discussed. The first method employs a simple structure. However, the generated signal level (amplitude) depends on the tuning process. This is a drawback of this method. The second method solves this drawback completely, and the generated signals have constant amplitudes during the tuning of FO. The expected behavior is confirmed by laboratory experiments utilizing commercially available high-speed active elements (current- and voltage-mode multipliers, video difference amplifier). Operational range was tested from frequencies of hundreds of kHz up to frequencies of tens of MHz. Springer Science+Business Media New York, 2015 Quadrature oscillator nationallicence Linear control nationallicence Current mode multiplier nationallicence Voltage-mode multiplier nationallicence Differential voltage buffer nationallicence Electronic control nationallicence Sotner Roman Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut Jerabek Jan Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut Langhammer Lukas Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut Polak Josef Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut Herencsar Norbert Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut Prokop Roman Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3058/10, 616 00, Brno, Czech Republic aut Petrzela Jiri Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut Jaikla Winai Department of Engineering Education, Faculty of Industrial Education, King Mongkut's Institute of Technology Ladkrabang, 105 20, Ladkrabang, Bangkok, Thailand aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/11(2015-11-01), 3449-3469 0278-081X 34:11<3449 2015 34 34 https://doi.org/10.1007/s00034-015-0015-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-015-0015-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sotner Roman Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Jerabek Jan Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Langhammer Lukas Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Polak Josef Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Herencsar Norbert Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Prokop Roman Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3058/10, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Petrzela Jiri Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology (BUT), Technicka 3082/12, 616 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Jaikla Winai Department of Engineering Education, Faculty of Industrial Education, King Mongkut's Institute of Technology Ladkrabang, 105 20, Ladkrabang, Bangkok, Thailand aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/11(2015-11-01), 3449-3469 0278-081X 34:11<3449 2015 34 34