Super low noise power supply

[Koifarm]

When using small signal preamps for microphone, mc/mm phono preamp or discrete preamp, a low noise power supply is a must.
Walt Jung and Didden have designed a topology that provide these low noise and low impedance over a wide spectrum.

I have used newer/better opamp and as voltage references led’s with lower noise.
The outcome is a super low noise voltage(9…18V) regulator(max.1A).

From linear audio: https://www.linearaudio.net/sites/linearaudio.net/files/v4 jdw.pdf

This schematic has noise <-130db.

Schematic can be adapted for 5V.

I have attached gerber files to order the PCB’s.

Have fun.

 

[pma]

Nice circuit. Do you have some measurements, like output noise spectrum?

 

[Koifarm]

See pictures below.
Spikes in graph are from my noisy room.

Noise from my regulator, measurement limit of my equipment was -130db

I also measured a TPS7A3301

 

[pma]

I see, but what is the reference level in those graphs? 0dBFS refers to what voltage?

 

[Sokel]

I see, but what is the reference level in those graphs? 0dBFS refers to what voltage?

12V if I see the pic right from my phone, it has a little screen attached.

 

[Koifarm]

0.775Vrms

 

[Koifarm]

There is also a thrue hole version.

More to read here : https://zelfbouwaudio.nl/forum/viewtopic.php?t=32175