An RC Oscillator With Comparator Offset Cancellation

@article{Paidimarri2016AnRO,
  title={An RC Oscillator With Comparator Offset Cancellation},
  author={Arun Paidimarri and Danielle Griffith and Alice Wang and Gangadhar Burra and Anantha Chandrakasan},
  journal={IEEE Journal of Solid-State Circuits},
  year={2016},
  volume={51},
  pages={1866-1877}
}
A fully-integrated 18.5 kHz RC time-constant-based oscillator is designed in 65 nm CMOS for sleep-mode timers in wireless sensors. A comparator offset cancellation scheme achieves 4× to 25× temperature stability improvement, leading to an accuracy of ±0.18% to ±0.55% over -40 to 90 °C. Sub-threshold operation and low-swing oscillations result in ultra-low power consumption of 130 nW. The architecture also provides timing noise suppression, leading to 10× reduction in long-term Allan deviation… CONTINUE READING

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