Analysis of Noise in Data Acquisition Channel of Broad Band Seismic Recorder

Combined with the special application environment,referred to the design experience,and based on the techniques of 24bit Δ-ΣA/D,seismic data acquisition system with large dynamic range is realized by the 24bit Δ-Σconversion set(CS5371/CS5372 and CS5376).The less volume,higher reliability and convenient upgrade and maintenance have been realized using FPGA in the A/D interface circuit.In addition,the test circuit makes the field self-diagnosis and more convenient field application of the instrument possible.Last,the prototype has been finished,and the primary test results are given.