The Band-Pass ARC-Filter on Two Operational Amplifiers with Downconversion of the Pole and Independent Trimming of the Main Parameters

Active band-pass RC filters (BPF) of the second order on two operational amplifiers have a lot of construction options. The article proposes a new structure of the BPF, which is recommended as a second-order unit included into more complex devices of frequency selection. It is shown that in the BPF under consideration an independent trimming of the main parameters-pole frequency, pole attenuation, and transfer ratio in the bandpass range, is provided. Other known schemes of the BPF do not possess this property.