Use DAC0~3 to output differential audio

Hello Jackie,

Absolutely, see BrettG's post at https://ez.analog.com/message/53930#53930

Since everything in SigmaDSP happens for each sample interval, your differential outputs will remain exactly out of phase.

Best regards,

Bob

Hi Bob,

I see. One sample delay will be added to inverted channel.

So I think I can add a small function block to the none-inverted channel, which does not affect signal but delay one sample clock. Then 2 channels will be balanced. Can you recommend this block? Thanks.

Jackie

Hi Jackie,

The invert block doesn't add any delay, it only multiplies its input by minus-1 and immediately makes the result available to the next block in your signal flow. For example. in the flow shown the two signals cancel exactly, resulting in zero (invisible response) over the whole frequency range:

Thus you need not place any compensating delay in your non-inverting outputs.

Best regards,

Bob

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