Compact Continuous Time Common-Mode Feedback Circuit for Low-Power, Area-Constrained Neural Recording Amplifiers

A continuous-time common-mode feedback (CMFB) circuit for low-power, area-constrained neural recording amplifiers is proposed. The proposed CMFB compact; it can be realized by simply replacing passive components with transistors in a low-noise folded cascode operational transconductance amplifier (FC-OTA) that one of the most widely adopted OTAs amplifiers. also consumes no additional power, i.e., separate required, thus, fits well to multichannel analyzed implementation fully differential AC-coupled and compared an identical using conventional difference amplifier-based 0.18 ?m CMOS technology post-layout simulations. occupies ~37% less area ~11% smaller providing 2.67× larger output common mode (CM) range without CM bandwidth sacrifice comparison.