Tunable high-Q resonator by general impedance converter.

Authors :: Mifune, Toshiro
Mishonov, Todor M.
Serafimov, Nikola S.
Dimitrova, Iglika M.
Popeski-Dimovski, Riste
Velkoska, Leonora
Petkov, Emil G.
Varonov, Albert M.
Barone, Alberto
Source :: Review of Scientific Instruments; Feb2021, Vol. 92 Issue 2, p1-3, 3p
Publication Year :: 2021
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. [ABSTRACT FROM AUTHOR]