On 21/04/2008, <b class="gmail_sendername">Luigi Rensinghoff</b> &lt;<a href="mailto:luigi.rensinghoff@freenet.de">luigi.rensinghoff@freenet.de</a>&gt; wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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Back to the old thread..<div><br></div><div>I would be interested in a more precise description of that simple trick actually...</div><div><br></div><div>or is there a paper or some reading ???</div></div></blockquote><div>
<br>I used to have a print-out of a old paper describing how a state-variable filter with separate outputs for HP, BP and LP could emulate a moving spring with attached mass, getting the position from one output, the movement from another and so on.<br>
<br>Basically the same phenomenon and that might help you search?<br><br>Yours,<br>Kas.<br></div><br></div>