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Old 16th October 2012, 10:58 AM   #1
Join Date: Jan 2005
Default Tekko revisits UcD

I was looking around on the hypex web site and decided to revisit UcD, so i just drew this quickly in LTspice based on the example diagram: http://i.imgur.com/PiniW.png

Next is to try it in real life, in the simulation with the values shown, the oscillation frequency landed on around 800kHz.
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Old 17th October 2012, 08:01 AM   #2
Join Date: Jan 2005
Heres a small low power class d running with the UcD concept: IXDD430CI class d - YouTube

And heres an idea of a higher power version using a discrete frontend:
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Old 17th October 2012, 04:18 PM   #3
Macleod is offline Macleod  France
diyAudio Member
Join Date: Dec 2008
Location: Toulouse, south of France
UCD is back!

What changes/improvements are you targeting?
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Old 17th October 2012, 04:42 PM   #4
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Not targeting anything, just experimenting.
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Old 19th October 2012, 07:47 AM   #5
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Here is an idea for another version: http://i.imgur.com/XdQsy.png

The frontend plugs in into the connector on the left and can be anything you desire, for a clocked design, just omit the capacitor and resistor in series in the feedback loop as these two are the phase lead network for a UcD selfosc topology.
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