FIELD: geophysical instrumentation engineering; research earthquake-recording equipment. SUBSTANCE: converter has subtracting device, comparator, flip- flop, first polarity converter, first integrator, clock generator, and additional feedback loop ensuring implementation of comb filter operating algorithm which, in combination with additional low- frequency filter, fully eliminates distortions. Additional feedback loop has digital delay line, second polarity converter, second integrator, adder, and low-frequency filter. EFFECT: eliminated distortions of slope overload type caused by sudden rise of rate of input signal change. 1 dwg
