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The top part is off topic; scroll down to around the bottom for the circuit and description.
I haven't done the output stage yet; it's next.
Tim
-- Deep Fryer: A very philosophical monk. Website @
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Tube PWM... I finally got around to it
Sep 28, 2007
2 Replies
You will find, I think, some pretty significant nonlinearities in the output stage due to discontinuous conduction.
But please, don't let that stop you, it's an interesting notion.
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com
Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
Very interesting. One note based on me using those Heath scopes decades ago: the little nubs you are seeing are probably related to the scope's triggering circuitry either intentionally or unintentionally screwing up the horizontal sweep. (It is an injection- locked oscillator after all). IIRC if you move the trigger sensitivity up and down then the nubs move too. I never knew if this was intentional or not (after all many of the expensive scopes had an "intensify trigger point" option, maybe Heath had a cheaper way of doing it!)
Tim.
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