RE: A question about LCR circuits

• To: tesla-at-poodle.pupman-dot-com
• Subject: RE: A question about LCR circuits
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Wed, 14 May 1997 00:34:43 -0500
• Approved: tesla-at-stic-dot-net

Subject:      RE: A question about LCR circuits
       Date:  Wed, 14 May 1997 09:35:05 +1200
       From:  "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
Organization: Wellington Polytechnic, NZ
         To:  tesla-at-pupman-dot-com


Heinz,
         Given the value of Q=0.5, take any LCR circuit and arrange 
the values in it so that it equates. It certainly can't ring at any 
frequency. 0.5 is the value for critical damping for any filter is 
it not? This is standard filter theory according to the texts I've 
read on the subject.
    I did not say "the circuit cannot ring at and below DC" did I? I 
said "a circuit with a Q <= 0.5 can't ring".

Malcolm

> If you equate f=0 your talking D.C.. "at and below which" your circuit
> can't ring.
> 
> Heinz
<snip>

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