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

[Jeff Lasman]

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?

Jeff
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