BAND-PASS FILTER OF THE SECOND ORDER WITH INDEPENDENT ADJUSTMENT OF MAIN PARAMETERS Russian patent published in 2019 - IPC H03H1/00 H03H11/12 

Abstract RU 2697944 C1

FIELD: physics.

SUBSTANCE: invention relates to means of extracting a predetermined spectrum of a signal source, e.g. during further processing by analogue-to-digital converters of various modifications. Second-order band-pass filter with independent adjustment of main parameters comprises first and second differential operational amplifiers, resistors and capacitors, wherein phase shift is provided by using second and third resistors, when resistance of the first, fifth and eighth resistors changes the PFC inclination in the frequency region of the pole and changes the amplitude-frequency response at that frequency, as well as when changing the transmission coefficient M at the central frequency by changing the resistance of the fourth resistor, only the AFC level changes, wherein the PFC does not change.

EFFECT: technical result consists in providing independent adjustment of three main parameters of AFC – pole frequency (ωp), pole attenuation (dp), as well as transmission coefficient in pass band (M).

1 cl, 5 dwg

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Authors

Denisenko Darya Yurevna

Butyrlagin Nikolaj Vladimirovich

Svizev Grigorij Albertovich

Prokopenko Nikolaj Nikolaevich

Dates

2019-08-21Published

2019-02-25Filed