cant get output signal from DVDAC (12 bit)

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Anonymous
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Hi

   

I am trying to pass an audio signal as shown in the schematic but the part I have the problem is between the filter to DVDAC(12 bit)
unfortunately I can't make the DVDAC output any normal signal
all the other parts work good
also when I used VDAC8 it worked ok but i need 12 bit resolution from the filter.
(I use the opamp in order to get enough current for the speaker
did I place the capacitor for DVDAC on the right place

   


please help me with that
thanks

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