TY - GEN
T1 - A 0.6V 54DB SNR Analog Frontend with 0.18% THD for Low Power Sensory Applications in 65NM CMOS
AU - Badami, Komail
AU - Murthy, Kushal Dakshina
AU - Harpe, Pieter
AU - Verhelst, Marian
PY - 2018/10/22
Y1 - 2018/10/22
N2 - This paper reports a complete sensor-to-digital analog frontend based on a highly linear amplifier that uses a dynamic-comparator to translate voltage variations of a sensory signal to the time-domain using pulse-density-modulation, followed by a charge-pump to integrate these time-domain variations back to the voltage-domain. This, highly digital building blocks based voltage-to-time-to-voltage translation, enables a large open-loop gain proportional to the switching - frequency of the dynamic-comparator thus, enabling potential performance improvements with technology-scaling. The output of the closed-loop amplifier (50x voltage-gain) is digitized with an oversampling SAR ADC, thus allowing the complete 0.6V AFE to record a 54dB SNR along with a 0.18% THD at 75% full-scale while consuming only 1.8μW power consumption.
AB - This paper reports a complete sensor-to-digital analog frontend based on a highly linear amplifier that uses a dynamic-comparator to translate voltage variations of a sensory signal to the time-domain using pulse-density-modulation, followed by a charge-pump to integrate these time-domain variations back to the voltage-domain. This, highly digital building blocks based voltage-to-time-to-voltage translation, enables a large open-loop gain proportional to the switching - frequency of the dynamic-comparator thus, enabling potential performance improvements with technology-scaling. The output of the closed-loop amplifier (50x voltage-gain) is digitized with an oversampling SAR ADC, thus allowing the complete 0.6V AFE to record a 54dB SNR along with a 0.18% THD at 75% full-scale while consuming only 1.8μW power consumption.
UR - http://www.scopus.com/inward/record.url?scp=85056854323&partnerID=8YFLogxK
U2 - 10.1109/VLSIC.2018.8502343
DO - 10.1109/VLSIC.2018.8502343
M3 - Conference contribution
AN - SCOPUS:85056854323
T3 - IEEE Symposium on VLSI Circuits, Digest of Technical Papers
SP - 241
EP - 242
BT - 2018 IEEE Symposium on VLSI Circuits, VLSI Circuits 2018
PB - Institute of Electrical and Electronics Engineers
T2 - 32nd IEEE Symposium on VLSI Circuits, VLSI Circuits 2018
Y2 - 18 June 2018 through 22 June 2018
ER -