Berti
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Hi,
I try to give you a brief overview:
Advantages of Feedforward compared to Feedback: Lower signal swing at the output of the integrators (beneficial for amplifier design), larger first loop filter coefficient (better noise suppression than feedback structure), single DAC only, and depending on the implementation the feedforward structure might recover from instability without additional circuitry.
Disadvantages: The summing node in front of the quantizer.
In general I think that the lower signal swing is the main motivation why feedforward structures are preferred nowadays.
Cheers
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