Hysteresis Controller with constant switching frequency

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http://www.diyaudio.com/forums/showthread.php?postid=793688#post793688

Wau! What a tread!

In http://www.diyaudio.com/forums/showthread.php?postid=811328#post811328
Analogspiceman complains because has no inductor sense winding but this info is cleary visible on
the page 3 sch of the posted document.
Also on the picture of page 4 is easy to count the turns ratio 20:1.

As far as I understand, every body searches for a constant frequency solution…

What about the use of a PLL control referenced to a crystal oscillator?

One could control the reference of the comparator with the PLL and force a "constant" frequency! :whip:


Some thing like this: http://www.freepatentsonline.com/5160896.pdf
but with PLL instead of multiplier


Olivença é nossa!
Canas a concelho!
 
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