A 75 dB SNDR 10-MHz Signal Bandwidth Gm-C-Based Sigma-Delta Modulator With a Nonlinear Feedback Compensation Technique

@article{Huang2015A7D,
  title={A 75 dB SNDR 10-MHz Signal Bandwidth Gm-C-Based Sigma-Delta Modulator With a Nonlinear Feedback Compensation Technique},
  author={Jiageng Huang and Shiliang Yang and George Jie Yuan},
  journal={IEEE Transactions on Circuits and Systems I: Regular Papers},
  year={2015},
  volume={62},
  pages={2216-2226}
}
Wideband ( ≥10 MHz) continuous-time (CT) sigma-delta (ΣΔ) modulators generally use active-RC filters. On the other hand, Gm-C-filters avoid the need of a power-hungry driving stage due to their small loading. At the moment, the major challenge for designing Gm-C-based ΣΔ modulator is the narrow linear input range due to the nonlinear Gm amplifier, which… CONTINUE READING