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Thule Audio's GND Management by Integrated Amplifier with RC - who can explain
Thule Audio's GND Management by Integrated Amplifier with RC - who can explain
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Old 10th February 2010, 05:04 PM   #1
tiefbassuebertr is offline tiefbassuebertr  Germany
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Default Thule Audio's GND Management by Integrated Amplifier with RC - who can explain

There are two grounds: Analog GND and digital GND (D-GND)
The kind of creation I don't understand and I have never seen by others.

At first look it shows like a symmetrical supply voltage about +/-5VDC.
But there is only one voltage: +5Vdig.

Because no additional secundary winding for independent creating of the +5Vdig is in use, this way was choiced from Anders Thule.
The neg regulator drives a bidirectional diode (normally anti paralleling 1N4148) and creates 0V7DC refer to GND (A-GND). But the actually GND wire for the neg regulator goes here to +5Vdig !!
What about this idea from Anders Thule?

Who can give me a commonly circuit describtion ?
Attached Files
File Type: pdf Thule Audio Bal-ONE GND Man.ckt.pdf (9.0 KB, 117 views)

Last edited by tiefbassuebertr; 10th February 2010 at 05:14 PM.
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Old 10th February 2010, 05:33 PM   #2
tiefbassuebertr is offline tiefbassuebertr  Germany
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Default Thule Audio's Universal Inrush Current Limiter for their Amplifiers - very special?

incorrect place !! go to new thread
http://www.diyaudio.com/forums/solid...y-special.html
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File Type: pdf Thule Audio Inrush current Lim.pdf (13.5 KB, 76 views)

Last edited by tiefbassuebertr; 10th February 2010 at 05:57 PM.
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Old 10th February 2010, 09:03 PM   #3
tiefbassuebertr is offline tiefbassuebertr  Germany
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where is going the statement from "Ultima Thule" reading at 7.56 ?
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Old 4th January 2018, 10:58 AM   #4
tiefbassuebertr is offline tiefbassuebertr  Germany
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Quote:
Originally Posted by tiefbassuebertr View Post
There are two grounds: Analog GND and digital GND (D-GND)
The kind of creation I don't understand and I have never seen by others.

At first look it shows like a symmetrical supply voltage about +/-5VDC.
But there is only one voltage: +5Vdig.

Because no additional secundary winding for independent creating of the +5Vdig is in use, this way was choiced from Anders Thule.
The neg regulator drives a bidirectional diode (normally anti paralleling 1N4148) and creates 0V7DC refer to GND (A-GND). But the actually GND wire for the neg regulator goes here to +5Vdig !!
What about this idea from Anders Thule?

Who can give me a commonly circuit describtion ?
Any news ?
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Old 8th January 2018, 08:10 PM   #5
Boscoe is offline Boscoe  United Kingdom
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So by the looks of it (to me). The positive regulator creates the +5V then, as its reference is that same +5V, the LM337 generates another 0V or GND linked with the original by the paralleled diodes. The diodes are there for protection so the grounds do no move far apart. In my opinion, it's not a good circuit. With the tolerance of the resistors and the parts you could end up with a reasonable voltage difference between the grounds. The circuit isn't that necessary anyway. I've designed FPGA DSPs with 24bit audio DACs on the same ground and PSU and achieved over 120dB noise floor with proper PCB layout.
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