TY - GEN
T1 - A Calibration-Free 71.7dB SNDR 100MS/s 0.7mW Weighted-Averaging Correlated Level Shifting Pipelined SAR ADC with Speed-Enhancement Scheme
AU - Hung, Tsung Chih
AU - Wang, Jia Ching
AU - Kuo, Tai Haur
PY - 2020/2
Y1 - 2020/2
N2 - With the increasing demand for next-generation communication, the trend of developing wide-bandwidth, high-resolution ADCs has emerged, where pipelined SAR (PIPE-SAR) ADCs [1], [2] have become popular owing to their excellent power-efficiency due to the fewer number of opamps. However, the finite opamp gain error limits the resolution of PIPE-SAR ADCs. Without calibration, this work proposes the weighted-averaging correlated level shifting (WACLS) technique for PIPE-SAR ADCs to theoretically eliminate the finite opamp gain error and operate with a speed-enhancement scheme to overcome the speed-degradation drawback of the prior two-phase CLS-based residue amplification [3], [4]. In addition, a duty-cycle-controlled ring amplifier (ringamp) with quick start-up is proposed for power saving.
AB - With the increasing demand for next-generation communication, the trend of developing wide-bandwidth, high-resolution ADCs has emerged, where pipelined SAR (PIPE-SAR) ADCs [1], [2] have become popular owing to their excellent power-efficiency due to the fewer number of opamps. However, the finite opamp gain error limits the resolution of PIPE-SAR ADCs. Without calibration, this work proposes the weighted-averaging correlated level shifting (WACLS) technique for PIPE-SAR ADCs to theoretically eliminate the finite opamp gain error and operate with a speed-enhancement scheme to overcome the speed-degradation drawback of the prior two-phase CLS-based residue amplification [3], [4]. In addition, a duty-cycle-controlled ring amplifier (ringamp) with quick start-up is proposed for power saving.
UR - http://www.scopus.com/inward/record.url?scp=85083844984&partnerID=8YFLogxK
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U2 - 10.1109/ISSCC19947.2020.9063055
DO - 10.1109/ISSCC19947.2020.9063055
M3 - Conference contribution
AN - SCOPUS:85083844984
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 256
EP - 258
BT - 2020 IEEE International Solid-State Circuits Conference, ISSCC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE International Solid-State Circuits Conference, ISSCC 2020
Y2 - 16 February 2020 through 20 February 2020
ER -