A 5th order gm-C low-pass filter with ±3% cut-off frequency accuracy and 220MHz to 3.3GHz tuning-range in 28nm LP CMOS

@article{Sabatino2014A5O,
  title={A 5th order gm-C low-pass filter with ±3% cut-off frequency accuracy and 220MHz to 3.3GHz tuning-range in 28nm LP CMOS},
  author={Nicolo Sabatino and Gabriele Minoia and M. Roche and Daniele Baldi and Enrico Temporiti and Andrea Mazzanti},
  journal={ESSCIRC 2014 - 40th European Solid State Circuits Conference (ESSCIRC)},
  year={2014},
  pages={351-354}
}
A 5th order gm-C filter complete with calibration circuits with wide tuning range and cut-off frequency up to the GHz range is presented. To simplify calibrations, integrators are designed to have a relatively low static gain of 32dB, regulated with negative resistors. Transconductance and gain are continuously controlled with a master-slave approach leading to a remarkably stable filter shape and cut-off frequency accuracy within ±3% over a 0°-100° temperature range and ±5% supply variation. A… CONTINUE READING