UNIVERSAL BAND-PASS FILTER, LOW-PASS FILTER AND REJECTION FILTER ON THREE MULTI-DIFFERENTIAL OPERATIONAL AMPLIFIERS Russian patent published in 2020 - IPC H03H11/00 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering and can be used as an interface for selecting a given spectrum of a signal source, for example, during its further processing by analogue-to-digital converters of various modifications. Besides, proposed device has increased amplitude-frequency attenuation beyond operating frequencies range and expanded frequency range. For this purpose, a universal band-pass filter is proposed on three multidifferential operational amplifiers, which, in particular, comprises device input (1), first (2) output, which realizes the low-pass filter function, second (3) output, which realizes function of band-pass filter, third (4) output, which implements function of rejector filter.

EFFECT: technical result is the creation of a universal filter circuit, which provides the implementation at its outputs of the band-pass filter, the low-pass filter and the rejection filter functions.

1 cl, 4 dwg