low pass filter for DSD

[abraxalito]

If the noDAC's powered from 5V then it can't reach 2VRMS. I forget what the maximum modulation for DSD is, is it something around 70%? In which case with a 5V supply you can reach 1.2VRMS. If its 50%, then about 900mV.

 

[merlin el mago]

I guess you want to say the Amanero, if yes it's powered with 3.3V but the Chronus re-clocker it's powered with 5V.

 

[abraxalito]

I think the best way to get maximum signal would be to run balanced output - two filters per channel, one fed in-phase and the other anti-phase digital data. Then buffers, then a transformer between the buffered phases. With a 5V supply you'd have a chance of putting 2VRMS into the trafo.

 

[merlin el mago]

Using a flip-flop degrade the sounds quality.

I'm looking for an total output 2Vrms like any standard output DAC.

 

[merlin el mago]

Here's a variant of the noDAC filter designed for use with an active buffer (Zout is 4.7k). It has a loss of only 0.2dB.

Could I use with active tube amplification?

 

[abraxalito]

Sure, its not fussy about SS or tube.

 

[merlin el mago]

Here's a variant of the noDAC filter designed for use with an active buffer (Zout is 4.7k). It has a loss of only 0.2dB.

Hi abraxalito, could you provide the inductors?

 

[abraxalito]

I could make 38mH and 27mH inductors yes.

 

[merlin el mago]

Please send me PM with prices.