TY - GEN
T1 - An Energy Efficient Period-modulation-based Current-to-digital Converter for FET-type Sensors
AU - Heo, Wonseok
AU - Seong, Hoyong
AU - Youn, Donghyun
AU - Je, Minkyu
AU - Ha, Sohmyung
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - This paper presents an energy-efficient current-to-digital converter with period modulation (PM) to support gas sensors based on a field-effect transistor (FET). A frequency-locked loop (FLL) converts sensor current signals into a periodic signal, which is then quantized by applying a low-noise on-chip RC oscillator. The RC oscillator with an edge combiner and a digital filter is applied to reduce quantization noise. In addition, a current digital-to-analog converter (I-DAC) at the FLL input is employed to reduce conversion time and energy. This work is implemented standalone to minimize the system costs. The proposed work is implemented in 180-nm CMOS process, achieving a fast conversion time of 4.1 μs and a superior FoMw of 208.4 fJ/c-s.
AB - This paper presents an energy-efficient current-to-digital converter with period modulation (PM) to support gas sensors based on a field-effect transistor (FET). A frequency-locked loop (FLL) converts sensor current signals into a periodic signal, which is then quantized by applying a low-noise on-chip RC oscillator. The RC oscillator with an edge combiner and a digital filter is applied to reduce quantization noise. In addition, a current digital-to-analog converter (I-DAC) at the FLL input is employed to reduce conversion time and energy. This work is implemented standalone to minimize the system costs. The proposed work is implemented in 180-nm CMOS process, achieving a fast conversion time of 4.1 μs and a superior FoMw of 208.4 fJ/c-s.
KW - current-to-digital converter
KW - field-effect transistor (FET)
KW - frequency-locked loop (FLL)
KW - Gas sensor
KW - period modulation (PM)
KW - standalone
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U2 - 10.1109/ISOCC62682.2024.10762614
DO - 10.1109/ISOCC62682.2024.10762614
M3 - Conference contribution
AN - SCOPUS:85213311388
T3 - Proceedings - International SoC Design Conference 2024, ISOCC 2024
SP - 77
EP - 78
BT - Proceedings - International SoC Design Conference 2024, ISOCC 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 21st International System-on-Chip Design Conference, ISOCC 2024
Y2 - 19 August 2024 through 22 August 2024
ER -