In general,an amplifier is used to improve the measurement accuracy before the voltage signal input in-to the A/D converter.After the signal is amplified,it is necessary to wait for a period of time before sampling,which will result in longer measurement time.In this paper,a new measuring method that can directly adjust the magnifica-tion to the most appropriate amplitude is proposed to solve the problem.Twice sampling will be done:during the first sampling,the magnification is set to one;and during the second sampling,the magnification is changed according to the result of the first sampling.The contrastive analysis between the proposed method and the traditional magnifica-tion method is carried out to validate the proposed method.
万方数据
维普
