Analysis of DC offset Influence on Transient Signal

Abstract

Based on the characteristic of transient signal and the principle of floating-point data acquisition circuit, the influences of DC offset on transient signal are analyzed. And the conclusion can be obtained that the singularity and saturation distortions in transient signals can be produced by DC offset through the detailed principle analysis, the limits calculation of DC offset, and waveform simulation while the DC offset is present in floating-point amplifier circuit of floating-point data acquisition circuit. At the same time, the distributions of distortions in those conditions that the single and several theoretic transient signals and also in actual measured transient signal are compared and discussed. Finally, the corresponding solutions are given according to the main factors which produce the waveform distortion. In a word, this research can provide useful references for the adjustment of floating-point receiver and the analysis of waveform distortion.