[LinuxUsers] more Re: Sine wave vs shaped square wave

[David Kaiser]

So, then, maybe the question should be:  To what degree or resolution is
the "stepping" or "squareness" permittable.  Is there some calculus
or something that I can use to say "this much" approximation is as
good as a mathematically pure sine wave?

On 6/4/2009, "Todd Lyons" <tlyons at ivenue.com> wrote:

>On Wed, Jun 3, 2009 at 6:34 PM, Jeff Lasman <jplists at nobaloney.net> wrote:
>> Good info here:
>> http://sci.tech-archive.net/Archive/sci.electronics.design/2005-02/5165.html
>> But that was 2005, this is 2009, and UPSes using stepped square waves
>> come with $10,000 equipment warranty.
>> So have things (like design issues) fundamentally changed?
>
>Everything modern uses high frequency switching power supplies (unless
>you're like Gibson and got a PDP-8 :-).  So when you talk about
>stepped square waves, are you talking about PWM (Pulse Width
>Modulated) output?  That's par for the course nowadays.
>
>--
>Regards...      Todd
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