A 65nm CMOS ping-pong auto-zero resistance-to-frequency converter for resistive bridge sensors

@article{Li2016A6C,
  title={A 65nm CMOS ping-pong auto-zero resistance-to-frequency converter for resistive bridge sensors},
  author={Yong Li and Kuan Chuang Koay and Pak Kwong Chan},
  journal={2016 International Symposium on Integrated Circuits (ISIC)},
  year={2016},
  pages={1-4}
}
A low energy-noise switched-capacitor (SC) interface with low offset for resistive bridge sensor in 65nm CMOS technology is presented. It converts the resistance imbalance of the bridge sensor into a saw-tooth frequency using current-mode sensing technique. Auto-zero (AZ) technique incorporating with ping-pong architecture is proposed to reduce the offset and low-frequency noise of the amplifier. The AZ SC amplifier achieves a temperature coefficient of 0.016 µV/°C from −40 °C to 90 °C whilst… CONTINUE READING