FIELD: automatic control; analog- to-digital signal conversion in seismic recording or research equipment. SUBSTANCE: newly introduced in converter is digital code analyzing unit designed to check signals for approach to conversion maximum. This unit functions to generate control frequency at output in case signal is sufficiently close to conversion maximum so as to change cutoff frequency of low-frequency filter and, hence, to extend conversion limits of device. EFFECT: preventing overloads at high frequencies and high output-signal levels. 2 dwg
