Band Stop Filter with a Synthetic Inductor with Series Resistance and a Real Operational Amplifier

Jitka Mohylova, Josef Puncochar, Stanislav Zajaczek

Band Stop Filter with a Synthetic Inductor with Series Resistance and a Real Operational Amplifier

Číslo: 1/2018
Periodikum: Advances in Electrical and Electronic Engineering
DOI: 10.15598/aeee.v16i1.2317

Klíčová slova: Band stop filter; frequency shift; minimum transmission; real OPA; synthetic inductor, Filtr pro zastavení pásma; frekvenční posun; minimální přenos; skutečná OPA; syntetický induktor.

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Anotace: This paper deals with application of simple synthetic inductor with series resistance (non-ideal gyrator). Those inductors are seldom used. However, if we use this inductor in the arm of bridge, the circuit is able to achieve high performance. In this way we can get band stop filter with good performance. In the paper we solve influence of real OPA properties. Theoretical considerations are verified by means of simulations (MicroCap) and experiments. Based on theoretical considerations, simulations and experiments are finally determined by criteria that must meet real operational amplifier to make the circuit performed well.