Bandpass Sigma–Delta Modulator Employing SAW Resonator as Loop Filter

@article{Yu2007BandpassSM,
  title={Bandpass Sigma–Delta Modulator Employing SAW Resonator as Loop Filter},
  author={Rui Yu and Yong Ping Xu},
  journal={IEEE Transactions on Circuits and Systems I: Regular Papers},
  year={2007},
  volume={54},
  pages={723-735}
}
Continuous-time bandpass (BP) sigma-delta modulators (SigmaDeltaMs) employing surface acoustic wave (SAW) resonators as loop filters are presented. Compared with the loop filters realized with Gm-C and LC resonators, the SAW resonator has the advantage of high-Q factor, wide resonant frequency range and accurate resonant frequency without the need for automatic tuning. With the proposed anti-resonance cancellation and loop filter phase compensation techniques, a second- and a fourth-order BP… CONTINUE READING

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