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. Adjustment of pole frequency is provided by changing resistances of the second and third resistors, attenuation of the pole is adjusted by changing resistance of resistors of the first and sixth or fourth, adjustment of transmission ratio M is provided by changing resistance of the fifth resistor.
EFFECT: technical result consists in providing band-pass filter with lower parametric sensitivity with independent adjustment of three main parameters AFC – frequency of pole (ωs), attenuation of pole (ds), as well as transmission coefficient in pass band (M).
1 cl, 6 dwg
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