74 dB SNDR Multi-Loop Sturdy-MASH Delta-Sigma Modulator Using 35 dB Open-Loop Opamp Gain

@article{Maghari200974DS,
  title={74 dB SNDR Multi-Loop Sturdy-MASH Delta-Sigma Modulator Using 35 dB Open-Loop Opamp Gain},
  author={Nima Maghari and Sunwoo Kwon and Un-Ku Moon},
  journal={IEEE Journal of Solid-State Circuits},
  year={2009},
  volume={44},
  pages={2212-2221}
}
This paper presents a new multi-loop delta-sigma modulator which overcomes the necessity of high DC gain opamps that were needed in previous multi-loop modulators. Enabling the use of low gain opamps also allows low-voltage operation due to the reduced number of transistors between the power supply rails. In addition, all the digital filters are removed from the output of this modulator to minimize the overall system requirement. Instead, an in-loop digital addition facilitates the desired… CONTINUE READING
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