" it would be useful if we could see a spectrum analysis of the power supply's noise "

Posted by beppe61 (A) on July 13, 2016 at 22:49:36

In Reply to: RE: Power Supply Noise Specsmanship. Caveat emptor.... posted by Lesage on July 12, 2016 at 04:12:37:

Hi !
just to say that I agree with you.
Unfortunately spectra of power supplies are almost never provided.
I found an interesting article from Clifton Labs about this topic
I am attaching the link.
There is a very interesting picture of the 20 MHz spectra of different Power Supplies noise.
I honestly cannot image a more direct and better way to compare different power supplies.
Ok there is also reliability, MTBF, size, cost ... but speaking of residual noise/ripple ... I mean, I understand it even myself !
I love this kind of graphs.
What impresses me is that some very cheap smps have actually very decent performance.
But I am leaning towards good quality linear power supplies. They should have very low noise also beyond the audio band.
But a spectrum analyzer will tell almost everything about the quality of a power supply output. Very impressive instrument indeed.
I asked for some price and the good ones are very expensive.
If not I would buy one immediately.
If you have any source of spectral analysis on low voltage power supplies please share the link.
I would be very interested to know a little more.
Kind regards,
bg

http://www.cliftonlaboratories.com/power_supply_noise.htm (Open in New Window)

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Follow Ups Full Thread

Topic - Power Supply Noise Specsmanship. Caveat emptor.... - AbeCollins 13:02:56 07/11/16 (11)

RE: Power Supply Noise Specsmanship. Caveat emptor.... - soundchekk 05:34:44 07/12/16 (4)

RE: Power Supply Noise Specsmanship. Caveat emptor.... - fmak 13:25:13 07/15/16 (2)

RE: Power Supply Noise Specsmanship. Caveat emptor.... - AbeCollins 12:04:14 07/16/16 (1)

Trolling again - fmak 00:54:19 07/19/16 (0)

RE: Power Supply Noise Specsmanship. Caveat emptor.... - AbeCollins 07:12:38 07/12/16 (0)

RE: Power Supply Noise Specsmanship. Caveat emptor.... - Lesage 04:12:37 07/12/16 (5)

" it would be useful if we could see a spectrum analysis of the power supply's noise " - beppe61 22:49:36 07/13/16 (4)

RE: " it would be useful if we could see a spectrum analysis of the power supply's noise " - Lesage 02:13:45 07/14/16 (3)

RE: " it would be useful if we could see a spectrum analysis of the power supply's noise " - beppe61 03:05:53 07/14/16 (2)

About Audio Power Suplies - fmak 01:34:49 07/16/16 (1)

RE: About Audio Power Suplies - beppe61 08:49:07 07/16/16 (0)

Follow Ups

" it would be useful if we could see a spectrum analysis of the power supply's noise " - beppe61 22:49:36 07/13/16 (4)

RE: " it would be useful if we could see a spectrum analysis of the power supply's noise " - Lesage 02:13:45 07/14/16 (3)

RE: " it would be useful if we could see a spectrum analysis of the power supply's noise " - beppe61 03:05:53 07/14/16 (2)

About Audio Power Suplies - fmak 01:34:49 07/16/16 (1)

RE: About Audio Power Suplies - beppe61 08:49:07 07/16/16 (0)

" it would be useful if we could see a spectrum analysis of the power supply's noise "

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