A -80dB THD, 4Vpp Switched Capacitor Filter for 1.5V Battery-Operated Systems

@article{Nicollini1994AT,
  title={A -80dB THD, 4Vpp Switched Capacitor Filter for 1.5V Battery-Operated Systems},
  author={G. Nicollini and Angelo Nagari and Pierangelo Confalonieri and C. Crippa},
  journal={ESSCIRC '94: Twientieth European Solid-State Circuits Conference},
  year={1994},
  pages={104-107}
}
A fully-differential 5th order SC filter that operates from power supplies as low as 1.5V featuring a ¿80dB THD at 4Vpp output voltage is presented. A measured p-weighted noise of about 120¿Vrms leads to a dynamic range of 81.5dB. This circuit is used as reconstruction filter for a low voltage 14-bit DAC. The THD performance has been achieved thanks to a deep analysis of many distortion mechanisms and to the disclosure of a new distortion cause in sample data filters. The very low voltage… CONTINUE READING