A Low-Power Resistance-to-Frequency Converter Circuit With Wide Frequency Range

@article{Koay2015ALR,
  title={A Low-Power Resistance-to-Frequency Converter Circuit With Wide Frequency Range},
  author={Kuan Chuang Koay and Pak Kwong Chan},
  journal={IEEE Transactions on Instrumentation and Measurement},
  year={2015},
  volume={64},
  pages={3173-3182}
}
A 65-nm CMOS front-end relaxation oscillator-based interface circuit for resistive bridge sensors is presented. It converts the sensor ac input currents into the sawtooth frequencies through the use of the proposed direct current-sensing grounded integrator topology without resorting to any current mirror(s) for coupling or signal processing in current-mode circuit design. Validated by three test setups in experiments, the proposed work shows a sensitivity of 41.5 Hz/nA dedicated to the wide… CONTINUE READING