An ultra-low-power bioamplifier for implantable large-scale recording of neural activity

Yang Guo Li, Qingyun Ma, Mohammad Rafiqul Haider, Yehia Massoud

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Power dissipation of bioamplifiers has become one of the most critical factors for up-to-date implantable neural recording microsystems as the increasing of recording channels. This paper presents an ultra-low-power bioamplifier which is designed for the very-large-scale integration of neural recordings. To reduce the power, the proposed bioamplifier is designed to work with a 0.5 V power supply and all MOSFETs operate at weak inversion region. Both folded-cascode and wide-swing structures are employed to fully exploit the output swing. By producing a 18/1 bias current ratio between input transistors and load current mirror, the noise performance of the proposed bioamplifier is optimized for the given power dissipation. Designed in a 0.13-μm CMOS process, the proposed bioamplifier consumes only 61.7 nW power to obtain a gain of 23.8 dB and a bandwidth of 3.6 KHz. The input-referred noise over the entire bandwidth is 12.7 μVrms, corresponding to a noise-efficiency factor of 3.1. © 2013 IEEE.
Original languageEnglish (US)
Title of host publication2013 IEEE 14th Annual Wireless and Microwave Technology Conference, WAMICON 2013
StatePublished - Sep 9 2013
Externally publishedYes

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Generated from Scopus record by KAUST IRTS on 2022-09-13


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