Direct Calculation of Band-Pass Filters
نویسندگان
چکیده
Introduction. When calculating band-pass filters (BPF), the circuit elements can be determined by converting parameters of prototype low-pass (LPF). In a number cases, synthesized BPF does not have direct in low-frequency range. Such include, e.g., BPFs with nodes tied to zero potential and other types filters. Filters calculated directly equating coefficients filter transfer function (TF) realized TF obtained from frequency conversion followed solving corresponding system equations. Aim. To develop methodology for calculation attenuation poles. Materials methods. The simplest scheme poles formed two sequentially connected Г-shaped half-links on parallel circuits. is only at certain requirements upon characteristics. switching schemes an additional transverse branch sequential longitudinal branch, these restrictions are removed. this paper, we method inverse quasi-elliptical П-shaped T-shaped type, which no when selecting minimum unevenness amplitude-frequency response (AFR). Results. analytical expressions 6th 10th order were derived. Relations that allow equations determining reduced. For П- BPFs, representations inductances through central capacitances obtained. This made it possible express functions capacitances, same time as reducing system. Examples PPFs given. Conclusion. LPF, frequencies AFR both sides relations. fact makes eliminate equate numerators, thereby total Parameters, whose exceeds system, selected arbitrarily standardized values. As result, accuracy reproducing significantly improved.
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ژورنال
عنوان ژورنال: Izvestiâ vysših u?ebnyh zavedenij Rossii
سال: 2022
ISSN: ['2658-4794', '1993-8985']
DOI: https://doi.org/10.32603/1993-8985-2022-25-6-6-21