TY - GEN
T1 - A Low Noise Analog Frontend with Wide Temperature and Supply Ranges for Capacitive MEMS Microphones
AU - Liu, Guoao
AU - Hu, Yuanqi
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - In this paper, a front-end interface for capacitive MEMS microphone has been designed and optimised for all PVT corners, which are 1.6V to 3.6V supply voltages, -40°C to 125°C temperature range and comprehensive process variation. It consists of a source follower as the input buffer and a chopper-stabilized amplifier as a calibration stage. To handle the low-noise and high-dynamic-range requirements at the same time, temperature-dependent current biasing and common-mode splitting techniques have been adopted. Verification has been done via post-layout simulations, and the proposed frontend implemented in 0.18-μm CMOS process achieves 68.9dB SNR with 94 dBSPL input and 124 dBSPL AOP at worst scenarios with a typical -38dBV/Pa microphone. Besides, the proposed system eliminates the necessity of LDO, which could further lower the power consumption.
AB - In this paper, a front-end interface for capacitive MEMS microphone has been designed and optimised for all PVT corners, which are 1.6V to 3.6V supply voltages, -40°C to 125°C temperature range and comprehensive process variation. It consists of a source follower as the input buffer and a chopper-stabilized amplifier as a calibration stage. To handle the low-noise and high-dynamic-range requirements at the same time, temperature-dependent current biasing and common-mode splitting techniques have been adopted. Verification has been done via post-layout simulations, and the proposed frontend implemented in 0.18-μm CMOS process achieves 68.9dB SNR with 94 dBSPL input and 124 dBSPL AOP at worst scenarios with a typical -38dBV/Pa microphone. Besides, the proposed system eliminates the necessity of LDO, which could further lower the power consumption.
UR - https://www.scopus.com/pages/publications/85167724505
U2 - 10.1109/ISCAS46773.2023.10181576
DO - 10.1109/ISCAS46773.2023.10181576
M3 - 会议稿件
AN - SCOPUS:85167724505
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - ISCAS 2023 - 56th IEEE International Symposium on Circuits and Systems, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 56th IEEE International Symposium on Circuits and Systems, ISCAS 2023
Y2 - 21 May 2023 through 25 May 2023
ER -