TY - GEN
T1 - A Low-Power 8-to-12-bit Reconfigurable SAR ADC for Portable Ultrasound Systems
AU - Liu, Yang
AU - Shen, Jiaqi
AU - Zhang, Zengyi
AU - Wu, Wenhao
AU - Shi, Chunqi
AU - Huang, Leilei
AU - Liu, Boxiao
AU - Zhang, Runxi
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - A low-power reconfigurable successive approximation register (SAR) analog-to-digital converter (ADC) for portable ultrasound systems is presented. The ADC features a high power-efficiency 8-to-12-bit capacitive digital-to-analog converter (CDAC), and a "1-step"switching scheme is proposed to further reduce the switching energy of CDAC. A body-biasing technique is employed to calibrate the offset of the comparator. The ADC operates at 6.25 MS/s in 9-to-12-bit modes and can operate at 50 MS/s in the 8-bit mode. Designed in a 40-nm CMOS technology, the proposed reconfigurable SAR ADC achieves a post-simulated signal-to-noise and distortion ratio (SNDR) of 49.3/54.9/60.7/67.0/72.0 dB and a spurious-free dynamic range (SFDR) of 65.5/68.0/77.4/82.8/88.9 dB with a power consumption of 55.3/56.3/58.7/60.1/61.6 μW in 8/9/10/11/12-bit resolution modes at 6.25 MHz sampling rate, 49.0 dB SNDR and 65.3 dB SFDR with 332.5 μW power consumption in 8-bit resolution mode at 50 MHz sampling rate.
AB - A low-power reconfigurable successive approximation register (SAR) analog-to-digital converter (ADC) for portable ultrasound systems is presented. The ADC features a high power-efficiency 8-to-12-bit capacitive digital-to-analog converter (CDAC), and a "1-step"switching scheme is proposed to further reduce the switching energy of CDAC. A body-biasing technique is employed to calibrate the offset of the comparator. The ADC operates at 6.25 MS/s in 9-to-12-bit modes and can operate at 50 MS/s in the 8-bit mode. Designed in a 40-nm CMOS technology, the proposed reconfigurable SAR ADC achieves a post-simulated signal-to-noise and distortion ratio (SNDR) of 49.3/54.9/60.7/67.0/72.0 dB and a spurious-free dynamic range (SFDR) of 65.5/68.0/77.4/82.8/88.9 dB with a power consumption of 55.3/56.3/58.7/60.1/61.6 μW in 8/9/10/11/12-bit resolution modes at 6.25 MHz sampling rate, 49.0 dB SNDR and 65.3 dB SFDR with 332.5 μW power consumption in 8-bit resolution mode at 50 MHz sampling rate.
KW - Portable ultrasound system
KW - comparator calibration
KW - reconfigurable SAR ADC
KW - switching scheme
UR - https://www.scopus.com/pages/publications/85184924901
U2 - 10.1109/BioCAS58349.2023.10388564
DO - 10.1109/BioCAS58349.2023.10388564
M3 - 会议稿件
AN - SCOPUS:85184924901
T3 - BioCAS 2023 - 2023 IEEE Biomedical Circuits and Systems Conference, Conference Proceedings
BT - BioCAS 2023 - 2023 IEEE Biomedical Circuits and Systems Conference, Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE Biomedical Circuits and Systems Conference, BioCAS 2023
Y2 - 19 October 2023 through 21 October 2023
ER -