caa a22 4500 606206418 CHVBK 20210128101011.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00034-014-9907-1 doi (NATIONALLICENCE)springer-10.1007/s00034-014-9907-1 A Low Power, High Performance Analog Front-End Circuit for 1V Digital Hearing Aid SoC [Elektronische Daten] [Chengying Chen, Jun Fan, Xiaoyu Hu, Yong Hei] In this paper a low power, high performance analog front-end (AFE) circuit for digital hearing aid SoC is presented. It adopts digital-feedback-gain-control (DFGC) for accurate amplification and the multi-bit Sigma-Delta modulator technique to improve dynamic range with low power consumption. The auto gain control loop with peak-statistics-logic and DFGC can also work in variable gain control mode controlled by digital signal processor. Moreover, data weighted averaging circuit reduces nonlinearity of multi-bit Sigma-Delta technique. The analog front-end is implemented in SMIC 0.13 $$\upmu $$ μ m 1P8M CMOS process. The measurement results show that in 1 V power supply, at 200 mV $$_{\mathrm{p-p}}$$ p - p , between 100 Hz and 8 kHz, the output minimum noise floor is $$-$$ - 120 dBm. And the maximal SNR is 88 dB, SNDR is 81 dB, total power is 180 $$\upmu $$ μ W for a single-channel AFE, which meets the application requirement of hearing aid SoC. Springer Science+Business Media New York, 2014 Hearing aid device nationallicence Low power nationallicence Auto gain control nationallicence Multi-bit quantization nationallicence Data weighted averaging nationallicence Chen Chengying ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut Fan Jun ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut Hu Xiaoyu ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut Hei Yong ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/5(2015-05-01), 1391-1404 0278-081X 34:5<1391 2015 34 34 https://doi.org/10.1007/s00034-014-9907-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9907-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Chengying ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Fan Jun ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Hu Xiaoyu ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Hei Yong ASIC & System Department, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, People's Republic of China aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/5(2015-05-01), 1391-1404 0278-081X 34:5<1391 2015 34 34