From: Martin thompson (Martin.J.THOMPSON@lucasvarity.com)
Date: Fri Mar 03 2000 - 09:08:19 PST
Can I ask for some science to back this sort of comment up, otherwise I
have to choose between one comment saying its good and another saying
its bad. I suppose I could use some metric like 'number of typos in
message' to decide :-)
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From: Ritchey Lee [SMTP:email@example.com]
Sent: Friday, March 03, 2000 1:48 AM
Subject: Re: [SI-LIST] : Adding inductors to ground?
It's a common practice that is a bad idea. Can't say how it got
started, but it's a sure way to degrade the performance of parts.
Chris Bobek wrote:
> I came across a schematic that shows the PLL ground of an IC connected
> to ground through an inductor. The Vcc pin of the device is connected
> to a bunch of caps and an inductor to Vcc.
> I understand and have used an inductor (or a resistor) with a bunch of
> decoupling caps on Vcc for applications like this. But, I've always
> tied the Gnd pin(s) directly to ground. It doesn't make any sense to me
> why you would want to add inductance in the path of any ground. It
> seems you would just add switching noise to your device.
> Can somebody explain whether this is common practice, or whether it was
> a poor design (sorry I don't have more information on the particular
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