@article{Antypenko_Kyrpatenko_Movchanyuk_Fesich_2023, title={Second-Order Filters with Independent Setting and Adjustment of Basic Parameters}, url={https://radap.kpi.ua/radiotechnique/article/view/1951}, DOI={10.20535/RADAP.2023.93.5-10}, abstractNote={<p>A new topology of the second-order low-pass filter containing three operational amplifiers is proposed. As known, a feature of second-order filters based on operational amplifiers is the interdependence of the main filter parameters, such as the pole frequency, Q factor and gain. The second-order filters synthesized by the state variable method have the smallest relationship between the main parameters, but they also do not allow independent adjustment of the gain and Q factor, and contain at least three operational amplifiers.</p>
<p>The proposed low-pass filter topology also contains three operational amplifiers and provides the possibility of independent setting of the pole frequency, Q factor and gain, as well as the possibility of independently adjustment of the Q factor and gain. Relationships have been obtained that relate the pole frequency, Q factor and filter gain to the nominal values of the passive filter elements. On the basis of these ratios, the possibility of independently changing the Q factor and gain of the filter is shown.<br />On the basis of this topology, a second-order universal filter was synthesized with the possibility of independent setting and adjustment of the main parameters. A cut-off filter with independent installation and adjustment of the main parameters is also offered.</p>
<p>Examples of second-order low-pass filter calculations and simulation results are given, which confirm the correctness of the calculations. Also, the results of modeling universal and rejection filters are given.</p>}, number={93}, journal={Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia}, author={Antypenko , R. V. and Kyrpatenko , I. M. and Movchanyuk , A. V. and Fesich , W. P.}, year={2023}, month={Sep.}, pages={5-10} }