PSN-L Email List Message

Subject: Geophone electrical model
From: Brett Nordgren brett3nt@.............
Date: Sat, 06 Oct 2012 22:38:42 -0400

Hi all,

I just finished up documenting a mechanical-analog electrical model 
for geophones.  It can be incorporated in a circuit simulation 
program such as Spice, and allows you to look at the overall system 
performance with respect to a ground velocity excitation.  It has 
been particularly useful when modeling Dave's various 
negative-resistance period-extending circuits.  There are two 
commonly used methods for creating these analogs and the one used 
here is the one in which velocity is modeled as a voltage.

It includes an Excel workbook for computing the analog equivalent 
component values from the geophone spec. sheet, and includes some examples.



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