FIELD: radio engineering, communication.
SUBSTANCE: invention is based on change in the average value of a random process as a result of nonlinear conversion thereof. After passing through a device with a monotonous nonlinear characteristic, a random process with a zero average changes its spectral composition such that a constant component which depends on the degree of manifestation of nonlinearity arises therein. Thus, the technical result is achieved by measuring and analysing the average value of a digital code at the output of the investigated analogue-to-digital converter. The apparatus for detecting nonlinear distortions has a subtractor unit, a unit for measuring the magnitude of the average value of the digital code and a decision unit. In another version, the apparatus consists of a unit for measuring the average value of the digital code and a decision unit.
EFFECT: high accuracy of detecting arising distortions by detecting distortions before clipping begins.
6 cl, 3 dwg
