Abstract: For repressing effectively the influence of random disturbance on the stability of the A/D sampling data, a method is proposed to process those datas before the succedent applications.The algorithm is proved exactly and the details are investigated.The numeral fluctuation can be restrained satisfactorily on the processed output datas.In the above datas the sampling datas are subjoined iteratively and dynamically, and the relationship is logarithm between the convergence precision and the operation number.

Key words: random disturbance, measurement of non-electric parameters, A/D sampling, iteration