Effect of Frequency Dependent Open-Loop Gain of Operational Amplifiers on Characteristics of a Generalized Impedance Converter

A model of a generalized impedance converter based on operational amplifiers has been developed. The model takes into account all basic frequency-dependent parameters of the converter circuit elements and makes it possible to study a number of its frequency-dependent characteristics. The frequency dependencies of the modulus and argument of the input impedance of the converter, as well as the frequency dependence of its input inductance were studied. The frequency dependence of the relative difference between the input inductances of the generalized impedance converter calculated with and without taking into account the frequency dependence of the open-loop gain of the operational amplifiers was determined. The frequency dependencies of the sensitivity of the input inductance to changes of the parameters of the converter elements are considered.