Kwak, Joon Young Park, Sung-Yun 2024-01-19T15:34:37Z 2024-01-19T15:34:37Z 2021-09-02 2021-01 2079-9292 https://pubs.kist.re.kr/handle/201004/117617 A continuous-time common-mode feedback (CMFB) circuit for low-power, area-constrained neural recording amplifiers is proposed. The proposed CMFB circuit is compact; it can be realized by simply replacing passive components with transistors in a low-noise folded cascode operational transconductance amplifier (FC-OTA) that is one of the most widely adopted OTAs for neural recording amplifiers. The proposed CMFB also consumes no additional power, i.e., no separate CMFB amplifier is required, thus, it fits well to low-power, area-constrained multichannel neural recording amplifiers. The proposed CMFB is analyzed in the implementation of a fully differential AC-coupled neural recording amplifier and compared with that of an identical neural recording amplifier using a conventional differential difference amplifier-based CMFB in 0.18 mu m CMOS technology post-layout simulations. The AC-coupled neural recording amplifier with the proposed CMFB occupies similar to 37% less area and consumes similar to 11% smaller power, providing 2.67x larger output common mode (CM) range without CM bandwidth sacrifice in the comparison. English MDPI Compact Continuous Time Common-Mode Feedback Circuit for Low-Power, Area-Constrained Neural Recording Amplifiers Article 10.3390/electronics10020145 1 ELECTRONICS, v.10, no.2, pp.1 - 11 ELECTRONICS 10 2 1 11 Y scie scopus 000611106200001 2-s2.0-85099410158 Computer Science, Information Systems Engineering, Electrical & Electronic Physics, Applied Computer Science Engineering Physics Article common-mode feedback folded-cascode operational transconductance amplifier multichannel neural recordings