FIELD: digital measurement technology. SUBSTANCE: analog-to-digital converter incorporating provision for periodic zero control within comprehensive range of input signal and in external noise environment has signal source, analog subtracting device, control device, and also adder accumulator, normalizing device, digital subtracting device, adding-subtracting device, and parallel register. Analog-to-digital converter enables noise suppression due to signal accumulation and averaging, measurement of difference between zero code and averaged error code, and its comparison with that measured before. Control of DC component is raised due to reduced number of significant positions influencing measurement accuracy. EFFECT: enhanced zero control accuracy due to eliminating impact of errors on conversion results. 1 dwg
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