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chriscam 14th June 2010 10:32 AM

pass-d : zen using a switched constant current source
hi there,

While enjoying The Zen Variations - Part 2 I stumbled into the paragraph where Papa says :

The current source can be made as simple as a resistor (or a light bulb), but it is generally advantageous to make it out of something more complex, since using a resistor results in about 8% efficiency or so, and this being power circuit, wasting this much power gets costly and is socially incorrect.
Since about half the output power gets dissipated in the constant current source I wonder if it makes sense to replace it with a - preferably resonant - bucket switcher ?

Searching this forum for switched current source gave no joy which makes me wonder, could this work or does it just sound so horrible no one even bothered to give it a try ?

StevenOH 14th June 2010 01:25 PM

chriscam 14th June 2010 01:46 PM

ahhh, got it, thanks for pointing !

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