Tunable high-Q resonator by general impedance converter

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

doi:10.1063/5.0041136

Tunable high-Q resonator by general impedance converter

Journal

Review of Scientific Instruments

Date Issued

2021-02-01

Author(s)

Mifune, Toshiro

Mishonov, Todor M.

Serafimov, Nikola S.

Dimitrova, Iglika M.

Popeski-Dimovski, Riste

Velkoska, Leonora

Petkov, Emil G.

Varonov, Albert M.

Barone, Alberto

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.