高性能波形数字化仪的研究

Research on High Performance Waveform Digitizer

提出了一种具有高速高精度特点的波形数字化仪的设计方法,研究了基于混合滤波器组的非均匀采样校准处理技术、相位补偿方式多通道采样同步技术,以及数据分相技术实现大容量采样存储。文中详细论述了波形数字化仪系统体系结构、相关技术原理与实现方法。

A design method of the waveform digitizer characterizing high speed and high resolution of A/D conversion was presented in this paper. The relative key techniques, including correction for the non-uniform sampiing based on the Hybrid Filter Banks （HFB）, multi-channels synchronized sampling with phase compensation, and samples storage divided in multi-phases, were studied. These techniques have remarkably given attention in the field of data acquisition recently. However, some subjects puzzled the researchers with some errors and difficulties due to the technological limitation, especially that such as the length of filter for HFB, the jitter of sampling clock and the lower speed memory being unable to meet the high sampling rate. Thereby, the paper attempts to present the way of their realizationin detail.