120 dB DAC Design for audio

[colombo2]

Hi,

Has anybody built one of these 120 dB audio DAC?
I have a question about it......

It typically has an interpolation filter and a DS modulator followed by an off-chip filter.

Is the interpolation filter just a simple linear interpolator or does it require some complex interpolation algorithm?

Colombo2

 

[wwfhm2002]

I design a sigma delta DAC which has a 254 taps fir filter and simple interpolation filter. But you can look the 254 taps fir filter and the interpolation(repeat or insert zeros) filter as one interpolator, which is not simple now.

 

[feel_on_on]

254 taps ? ur Delta-Sigma filter have 254 taps? how many order it is ?