The Simulation Analysis for Expanding Moving-coil Geophones’ Frequency Band Which Based on Negative Feedback Resistor

Abstract

there are more and more observational requirements of micro-seismic events, which usually need many geophones in the measurement network, and the moving-coil geophone is the most mature and cheap product, but the band of the moving-coil geophones on the high frequency appears inadequate, it is necessary to expand its frequency band, this paper use a negative feedback resistor to make it, it uses its simulation model of electric system for its simulation analysis in the Multisim software, in addition, it uses its transfer function model as the another simulation by the Matlab, which is verified to confirm the validity of the program.