PSN-L Email List Message
Subject: Pendulum response and Roberts' circuit
From: John or Jan Lahr JohnJan@........
Date: Mon, 04 Dec 2006 21:49:04 -0800
Because I'm continually needing to refresh my memory with respect to
the response of a simple pendulum to ground motion, and then thinking
in terms of the output from a magnet/coil pickup, I've created this page:
with some notes and graphs.
Broad-band systems are generally set up to have a flat response to
ground velocity over a wide range of frequencies. I've posted the
circuit that Peter Roberts developed to flatten the response of a
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