<abstract xmlns="http://www.w3.org/1999/xhtml"><p> This work presents an example of implementation of electronically controllable features to an originally unsuitable circuit structure of oscillator. Basic structure does not allow any electronic control and has mutually dependent condition of oscillation (CO) and frequency of oscillation (FO) if only values of passive elements are considered as the only way of control. Utilization of electronically controllable current conveyor of second generation (ECCII) brings control of CO independent of FO. Additional application of voltage amplifier with variable gain in both polarities (voltage-mode multiplier) to feedback loop allows also important enlargement of the range of the independent FO control. Moreover, our proposal was tested and confirmed experimentally with commercially available active elements (“Diamond transistor”, current-mode multiplier, voltage-mode multiplier) in working range of tens of MHz.</p></abstract>

This work presents an example of implementation of electronically controllable features to an originally unsuitable circuit structure of oscillator. Basic structure does not allow any electronic control and has mutually dependent condition of oscillation (CO) and frequency of oscillation (FO) if only values of passive elements are considered as the only way of control. Utilization of electronically controllable current conveyor of second generation (ECCII) brings control of CO independent of FO. Additional application of voltage amplifier with variable gain in both polarities (voltage-mode multiplier) to feedback loop allows also important enlargement of the range of the independent FO control. Moreover, our proposal was tested and confirmed experimentally with commercially available active elements (“Diamond transistor”, current-mode multiplier, voltage-mode multiplier) in working range of tens of MHz.

Simple Oscillator with Enlarged Tunability Range Based on ECCII and VGA Utilizing Commercially Available Analog Multiplier

Dept. of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 3082/12, 616 00, Brno, Czech Republic

Dept. of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 3082/12, 616 00, Brno, Czech Republic

Dept. of Electronic Engineering, Chung Yuan Christian University, 32023, Chung-Li, Taiwan

Dept. of Technical Studies, College of Polytechnics Jihlava, Tolsteho 16, 586 01, Jihlava, Czech Republic

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

This work presents an example of implementation of electronically controllable features to an originally unsuitable circuit structure of oscillator. Basic...

Simple Oscillator with Enlarged Tunability Range Based on ECCII and VGA Utilizing Commercially Available Analog Multiplier

Published Online: May 06, 2016

Page range: 35 - 41

Received: Sep 03, 2015

Accepted: Mar 22, 2016

DOI: https://doi.org/10.1515/msr-2016-0006

Keywords
Current- and voltage-mode multipliers, oscillators, electronic control, mutual dependence of condition and frequency, diamond transistor, variable gain, voltage amplifier

© by Roman Sotner

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Simple Oscillator with Enlarged Tunability Range Based on ECCII and VGA Utilizing Commercially Available Analog Multiplier

Published Online: May 06, 2016

Page range: 35 - 41

Received: Sep 03, 2015

Accepted: Mar 22, 2016

DOI: https://doi.org/10.1515/msr-2016-0006

KeywordsCurrent- and voltage-mode multipliers, oscillators, electronic control, mutual dependence of condition and frequency, diamond transistor, variable gain, voltage amplifier

© by Roman Sotner

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Current- and voltage-mode multipliers, oscillators, electronic control, mutual dependence of condition and frequency, diamond transistor, variable gain, voltage amplifier