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Power supplies and their ambushes
Power supplies and their ambushes
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Old 8th January 2005, 10:45 PM   #21
pinkmouse is offline pinkmouse  Europe
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Power supplies and their ambushes
SY

I must admit, that does seem much more sensible to me. Perhaps the US legal system does have its good points after all!
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Old 8th January 2005, 10:51 PM   #22
byteboy is offline byteboy  Netherlands
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Default patent claims

Sorry guys for my previous post, couldn't help myself....

My try to get this topic "on-topic" again:

One of the most important things IMHO for applying for a patent is a deep knowledge of the technology involved to be sure that it is not patented before or worth patenting in the first place.

I cannot imagine, but I'have not studied nor looked it up specifically, that the basic PSU technology discussed isn't patented long time ago and patent free at this moment or "public domain" in any application?

I think the "patent-guru's" at the forum can dig up some "old and grey" patent claims?

Would be nice to see.......
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Old 8th January 2005, 11:46 PM   #23
moamps is offline moamps  Croatia
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Quote:
Originally posted by yldouright
The same conditions apply to this as with my previous patent applications exposed via this public forum. Any and all diyaudio members may use this idea in their designs as long as it is not for profit or part of a commercial product or enterprise. If it is used for commerical purposes, you must obtain my written consent or forfeit all profits persuant from its use.
You're joking, right? The design you have published here is seriously flawed in the sense that it would simply melt down the transformer and/or rectifers.

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Milan
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Old 8th January 2005, 11:48 PM   #24
Keld is offline Keld  Sweden
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Am I missing something here, To me it looks like a short circuit via 2 diodes.
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Old 8th January 2005, 11:49 PM   #25
moamps is offline moamps  Croatia
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Exactly.
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Old 8th January 2005, 11:51 PM   #26
hummhoom is offline hummhoom  Aruba
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I don't see what innovation is worth patenting. There's nothing in that circuit that hasn't been done before.

I also fail to see any way it could reduce the noise. It uses twice as many diodes, with twice the series loss and twice the noise as are required.
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Old 8th January 2005, 11:54 PM   #27
mpmarino is offline mpmarino  United States
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Hummhomm:
Quote:
Class A is like driving with the parking brake on
I like that..good analogy.

But remember, driving with the parking brake on can be a lot of fun, especially when it's cold and snowy!

No thread jack intended
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Old 8th January 2005, 11:57 PM   #28
uli is offline uli  Austria
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Quote:
Originally posted by hummhoom
There's nothing in that circuit that hasn't been done before.

You mean, s..t happens ?

I bet the diodes go first, this guy owns a 8kw xfmr.

Uli

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Old 9th January 2005, 12:08 AM   #29
yldouright is offline yldouright
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moamps, keld and hummhoom
Thanks for taking the time to look over what I presented. Okay, I know what I want to accomplish but perhaps I can't draw it in an understandable fashion so I will try and explain with words. In a transformer with a single center tap and two secondaries, we have two poles on opposite sides of a common center point. The first pole winding to the center point creates the first secondary and the winding from the center point to the opposing pole creates the other secondary. When we use two bridges to create the positive and negative supply, we have one common return point on which to connect both the bridges. The consensus is that we have a short but does it have to be?
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Old 9th January 2005, 12:20 AM   #30
moamps is offline moamps  Croatia
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Quote:
Originally posted by yldouright
.... In a transformer with a single center tap and two secondaries.... When we use two bridges to create the positive and negative supply...
Hi,
I would appreciate it if you could re-draw the design then. Anyways, connecting two bridges to a transformer with a single center tap does not make much sense, if any.

Regards,
Milan
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