[SI-LIST] switch mode power supply noise (class D amps as well)

From: Doug Smith <doug@xxxxxxxxxx>
To: Si-List <si-list@xxxxxxxxxxxxx>
Date: Thu, 23 Oct 2014 16:36:53 -0700
Hi All,

I am going to present a one hour web session next Thursday, October 30th 
on a problem a lot of engineers have encountered.

Here are the details:

Next presentation: Thursday,  October 30th @ 10:00 a.m. Pacific time: 
Switching Circuits in Electronic Systems (Problems and solutions for the 
design engineer)

Switch mode power supplies (at system and board level) and other 
switching devices like class D amplifiers and pulse width modulation 
controlled devices have caused a lot of noise problems over the years 
resulting in a lot of weekends and evenings at work for engineers. This 
webinar will discuss the four modes of noise generation in switching 
circuits and how to deal with them. The fourth mode is not well known 
yet causes many of the problems due to switching circuits and is not 
covered in specifications.

Did you know that switching circuits generate noise that can cause 
intermittent operation of systems with problems occurring once per hour 
or even less frequently? How this can happen will be discussed and ways 
of debugging this type of problem will be covered. Examples will be 
discussed where switching noise generated in one part of a system caused 
problems in remote parts of the system, including one case where a hard 
drive was corrupted from a meter away and the drive was not even 
connected to the noisy supply causing the problem.

Recommendations from system level to PCB level are given, right down to 
the type of inductors/transformers recommended for supplies mounted on PCBs.

Here is an outline: http://emcesd.com/pdf/HFSwitching.pdf
And a registration form: http://emcesd.com/pdf/HFSwitching_regform.pdf

Doug

-- 
University of Oxford Tutor
Department for Continuing Education
Oxford, Oxfordshire, United Kingdom
--------------------------------------------------------------
      ___          _            Doug Smith
       \          / )           P.O. Box 60941
        =========               Boulder City, NV 89006-0941
     _ / \     / \ _            TEL/FAX: 702-570-6108/570-6013
   /  /\  \ ] /  /\  \          Mobile:  408-858-4528
  |  q-----( )  |  o  |         Email:   doug@xxxxxxxxxx
   \ _ /    ]    \ _ /          Web:     http://www.dsmith.org
--------------------------------------------------------------

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[SI-LIST] switch mode power supply noise (class D amps as well)

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