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Old 25th October 2017, 05:59 AM   #1481
ammel68 is offline ammel68  United States
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Super Regulator
Quote:
Originally Posted by EUVL View Post
LM329 is still an active part at LT ??
LM329 - 6.9V Precision Voltage Reference - Linear Technology


Patrick
It may be at LT, but they're quite expensive.
I was referring to the T.I. version of the LM329DZ/NOPB soon to be discoed by them.

UPDATE: This evening I just won an eBay auction for 140 pcs. of LM329DZ made by National Semiconductor. These were obviously made before T.I.'s buyout of National and their change over to all that lead-free garbage.
Now, I have a lifetime supply of LM329s to build as many Jung/Didden Super Regulator as I want.
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Old 6th November 2017, 08:29 AM   #1482
Walkalone is offline Walkalone  Viet Nam
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Dear Jan,
From what i understand from your articles, is it ok for connection from this super reg to load?!
Is there difference between joint Pos return and Neg return together and route to the load and the way that descibe as picture (joint at GND of load)?!
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Old 6th November 2017, 09:24 AM   #1483
jan.didden is offline jan.didden  Europe
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This looks perfectly OK. The point to remember is, that the point where you have the cleanest power is where the sense lines are connected to. The word 'sense' is quite literally: that is where the reg senses the voltage and regulates it.
By using remote sense you also correct for voltage drop due to R and L of the power connecting wires. This doesn't work well for very high frequencies due to the L, so that is why you need the little filter in the sense line, but for (high above) audio it is fine.

Jan
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Last edited by jan.didden; 6th November 2017 at 09:47 AM.
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Old 6th November 2017, 10:10 AM   #1484
Walkalone is offline Walkalone  Viet Nam
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Thanks Jan for your reply,

The design of this super reg that look like a universal design for many purpose more than only for split supply. Can i joint POS return and NEG return at one point and route to GND of load? It will help me saving one wire.
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Old 6th November 2017, 10:50 AM   #1485
jan.didden is offline jan.didden  Europe
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Quote:
Originally Posted by Walkalone View Post
Thanks Jan for your reply,

The design of this super reg that look like a universal design for many purpose more than only for split supply. Can i joint POS return and NEG return at one point and route to GND of load? It will help me saving one wire.
It will save you one wire but the pos reg will try to compensate for voltage drop due to the neg return current and vice versa. Keeping the returns separate is crucial for best performance.

Read my previous post again carefully ;-)

Jan
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Old 6th November 2017, 12:02 PM   #1486
Walkalone is offline Walkalone  Viet Nam
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Thanks again Jan,
It's very clear to understant.
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Old 21st November 2017, 01:55 PM   #1487
Walkalone is offline Walkalone  Viet Nam
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The low noise reference voltage LM329DZ has already EOL, so what can be replaced for this job?!
If i remember correctly, the power supply of a hi-end product which used AD586 to do same work. Plaese note that power supply have similar structure with your supperreg power supply. But the cost of AD586 is too high, more ten $ per each, it's terrible!
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Old 21st November 2017, 02:36 PM   #1488
Mark Johnson is online now Mark Johnson  United States
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Super Regulator
Quote:
Originally Posted by Walkalone View Post
The low noise reference voltage LM329DZ has already EOL, so what can be replaced for this job?!
If i remember correctly, the power supply of a hi-end product which used AD586 to do same work. Plaese note that power supply have similar structure with your supperreg power supply. But the cost of AD586 is too high, more ten $ per each, it's terrible!
Have you had a chance to read post #1469 in this thread? There were numerous follow-on comments in subsequent posts.
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Old 22nd November 2017, 03:38 AM   #1489
Walkalone is offline Walkalone  Viet Nam
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Sorry, i mean i just want to ask about equivalent replacement in the future. Of course i know i can purchase a tons now, but that isn't answer i'm looking for.
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Old 22nd November 2017, 05:57 AM   #1490
kamis is offline kamis  Serbia
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Why is AD825 op-amp the best choice for SR error amp, which specifications ?
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