+1
My friend tested it for his DAC. He compared to SMPS, he thought the shunt regulator have better sound quality.
5 volt Borbely shunt is very similar to his 24 volt shunt , except differential is bipolar transistor, no cascode, and driver is bipolar, shunt and current source still 2SK2013/2SJ313.
V ref 2.5 volts, he used LM 336 - 2.5, but Jung Gled is much quieter. I will take pictures in the next week.
V ref 2.5 volts, he used LM 336 - 2.5, but Jung Gled is much quieter. I will take pictures in the next week.
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It is from Walt Jung. I just copied it 😀 You can find somewhere in this forum. He gave two version. One version using LED and 2 TR and other using zener and 2 TR. He measured it, very low noise but have small drift with temperature. But I think temperature drift is not important to audio application.
Sorry, but WJ uses only a single transistor, this is why I asked.
Mr. Jung's ultra-low noise VREF - the GLED431
Mr. Jung's ultra-low noise VREF - the GLED431
Thank you for this also. I have seen it before, but did not remember it.
The one and two transistor versions correspond to figs 6 and 8 in
the aforementioned article in TAA and so I asked did you actually
compare the two for any practical difference. Walt Jung writes that
the added transistor "provides additional gain for the active diode,
which aids in lowering dynamic impedance".