地震数据采集器中Δ-∑AD转换器512 kHz数据流的仿真

Simulation of 512kHz data stream of delta-sigma AD modulator in earthquake data acquisition system

根据Δ-∑AD转换器原理,通过编程将给定的输入信号转换为1位串行Δ-∑数据流。用此数据流可以仿真地震数据采集器中的滤波抽样过程,检验设计构造的各级滤波参数能否满足地震观测的需要。为了证明该仿真程序的正确性,本文介绍了利用CS5376A公布的数字滤波参数对数据流进行滤波验证。

According to the theory of siva-delta AD modulator, the given input signal is converted into 1-bit serial sigma-delta data stream by programming. The data stream can be used to simulate the filter and decimating process for the acquisition of seismic data. We want to verify whether own-designed filter parameter meet the requirement for earthquake observation. In order to prove the correctness of the program, we use the data stream produced by the digital parameter of CS5376A to test the correctness of own-designed filter parameter.