Hi.
We know that in an RC active integrator (using op amp), to avoid very large gain for dc-input (for which the feedback capacitor behaves like an open-circuit) resulting in the saturation of the output voltage due to small dc-offset at input, a resistor, RF is connected in parallel with the feedback capacitor C as shown in attached Figure.

But, in continuous time Delta Sigma Modulator that uses RC integrator as loop filter, no such resistor is used in parallel to the feedback capacitor (as seen in all such literature/papers). Isn't the same fear of dc-offset present here as well?

Hi Ken,

Many thanks for your reply  :)

Then, can it be said that input offset of constituent op-amps are not of much concern in Delta Sigma Modulator due to the presence of negative-feedback arrangement in the modulator?

Thank you Ken for your help  :)

With regards.
JDP