Tunable high-Q resonator by general impedance converter

Toshiro Mifune; Todor M Mishonov; Nikola S Serafimov; Iglika M Dimitrova; Riste Popeski-Dimovski; Leonora Velkoska; Emil G Petkov; Albert M Varonov; Alberto Barone

doi:10.1063/5.0041136

Tunable high-Q resonator by general impedance converter

Rev Sci Instrum. 2021 Feb 1;92(2):025123. doi: 10.1063/5.0041136.

Authors

Toshiro Mifune¹, Todor M Mishonov¹, Nikola S Serafimov¹, Iglika M Dimitrova¹, Riste Popeski-Dimovski², Leonora Velkoska², Emil G Petkov¹, Albert M Varonov¹, Alberto Barone¹

Affiliations

¹ Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., BG-1784 Sofia, Bulgaria.
² Institute of Physics, Faculty of Natural Sciences and Mathematics, Sts. Cyril and Methodius University, 3 Arhimedova Str., MKD-1000 Skopje, R. N. Macedonia.

PMID: 33648147
DOI: 10.1063/5.0041136

Abstract

A tunable high-Q resonator is performed in the schematics of the General Impedance Converter (GIC). In the framework of frequency dependent open-loop gain of operational amplifiers, a general formula of the frequency dependence of the impedance of GIC is derived. The explicit formulas for the resonance frequency and Q-factor include as an immanent parameter the crossover frequency of the operational amplifier. Voltage measurements of GIC with a lock-in amplifier perfectly agree with the derived formulas.