FIELD: physics.
SUBSTANCE: invention relates to means of digital filtration of signals of automatic locomotive signalling. Filter includes in-series connected overvoltage protection unit, analogue-to-digital converter, digital filter with infinite impulse response, implemented on microcontroller, and digital-to-analogue converter, wherein said converters and IIR-filter are connected to voltage converter. Filter has a pass band width of 8 Hz and transmits only the upper band of the amplitude-shift keyed signal.
EFFECT: higher coefficient of orthogonality of amplitude-frequency characteristics and attenuation of noise outside the pass band, reduced effect of interference on stability of CACS locomotive devices.
1 cl, 1 dwg
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