How to calculate a low pass filter for DSD? like other LPF for example if I want a LPF of 50kHz R 32,83 ohms & capacitor 100nF?
No one can help me?
I want to take off the DAC using LPF followed by one hi-gain tube stage, can be done using the poste values for a LPF of 50KHz?
I haven't tried, I want to be sure before to connect something, if I have to try other filter suggestion will welcome.
How steep a filter do *you* think you need?
I have no idea that's the reason I'm asking help.
I suggest a 4th order LC filter for DSD. After all you'll want to aim for something approaching 120dB rejection at the switching frequency, which for DSD64 is 1.4MHz.
I don't want to use my DSD DAC, only the filter + hi-gain tube stage.
Ah, I see. What kind of circuit drives your filter? What is the HF behaviour of your tube stage?
I suggest a 4th order LC filter for DSD. After all you'll want to aim for something approaching 120dB rejection at the switching frequency, which for DSD64 is 1.4MHz.
What Low pass filter: Butterworth or Chebyshev?
What is the corner frecuency necessary?
What kind of filter: series or shunt?
I don't know the HF behaviour of the tube stage