We beat this dead horse a couple years ago -- the only opamp I couldn't get to work was the beloved LT1028. I did a lot of tests. Repeating myself, the AD797 picked up excitation
from WABC-AM at 770kHz and was very happy to oscillate and beat along with the music/or talk show as the case was at the time.
from WABC-AM at 770kHz and was very happy to oscillate and beat along with the music/or talk show as the case was at the time.
Thanks.
I was afraid the question had already been asked, but wasn't having much luck trying to find the right answer in 189 pages.
I was afraid the question had already been asked, but wasn't having much luck trying to find the right answer in 189 pages.
Super Regulator
I don't understand this, the AD797 (very low noise device) has higher noise than AD825?
Per-anders, when I hover the mouse over that figure, I observe that its filename ends in PSRR. So I suspect it is a plot of Vout/Vin where Vin is an AC signal added to the input of the regulator. In other words, not noise.
Hi Jan, thank you for making this design and sharing with us.
And everyone for their inputs in this thread.
I am about to start building +12v and +3.3v versions.
And was looking at the articles, it looks like the Walt's article is not available any more.
Does anyone know a more current link for reference.
Or may be LT spice files to play with.
Thanks,
Oleg
As far as I know, Walt has closed his website. I offered to host his articles but got no reply.
I think he still provides articles on request via his email, try waltjung@waltjung.org .
Jan
I think he still provides articles on request via his email, try waltjung@waltjung.org .
Jan
*http://waltjung.org* here
I don't think it is everything from the old site, but the TAA articles seem to be there.
I don't think it is everything from the old site, but the TAA articles seem to be there.
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Thank you. Will give it a read 🙂 still need to add AD825 and LM329 to finalize the schematic in LT spice.
waltjung.org access
For those having difficulty accessing waltjung.org, try this link:
index.html
Note the three link options highlighted. The third is the RefsnRegs directory, within which there is a TXT file listing details (A_All_RefsnRegs_Files.txt). Note: You can simply ignore a possible browser security warning. The sublinks provided use HTTPS when accessed.
There is also listed an email link, which is preferred over PMs.
May everyone remain virus free and otherwise healthy!
Walt Jung
For those having difficulty accessing waltjung.org, try this link:
index.html
Note the three link options highlighted. The third is the RefsnRegs directory, within which there is a TXT file listing details (A_All_RefsnRegs_Files.txt). Note: You can simply ignore a possible browser security warning. The sublinks provided use HTTPS when accessed.
There is also listed an email link, which is preferred over PMs.
May everyone remain virus free and otherwise healthy!
Walt Jung
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That's good news indeed Walt! Thanks for continuing to make this available.
Stay healthy,
Jan
Stay healthy,
Jan
Which DC sources are usually used for Super regulator.
I was thinking to try DC Flexi, or may be a bit more filtering caps would make more sense.
With +12v out and ~300-400ma load to run a DAC
Oleg
I was thinking to try DC Flexi, or may be a bit more filtering caps would make more sense.
With +12v out and ~300-400ma load to run a DAC
Oleg
Good question, but what's DC Flexi? A simple Google didn't throw up anything I could understand.
looking to use a super regulator for a raspberry pi psu
for 5.1v 3A is this possible or should i think about another regulator ?
for 5.1v 3A is this possible or should i think about another regulator ?
glennjarrett, one of the most important design variables that influences which regulator topologies are appropriate and which are not,
is one that you did not mention. Namely: worst case minimum DC input voltage.
It might be possible that you could use the LM1084 integrated circuit voltage regulator, if your worst case minimum DC input voltage is high enough. Study the datasheet for more information.
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is one that you did not mention. Namely: worst case minimum DC input voltage.
It might be possible that you could use the LM1084 integrated circuit voltage regulator, if your worst case minimum DC input voltage is high enough. Study the datasheet for more information.
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Even if it could be possible, it's a waste of money. It's all DC-DC regulators after the 5.1v input. Only if you could cut out every one of them, and then use other regulators, but not Jung's.