Power-to-Noise Optimization in the Design of Neural Recording Amplifier Based on Current Scaling, Source Degeneration Resistor, and Current Reuse

Autor: Zhen Wang, Xiao Wang, Guijun Shu, Meng Yin, Shoushuang Huang, Ming Yin
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Biosensors, Vol 14, Iss 2, p 111 (2024)
Druh dokumentu: article
ISSN: 2079-6374
DOI: 10.3390/bios14020111
Popis: This article presents the design of a low-power, low-noise neural signal amplifier for neural recording. The structure reduces the current consumption of the amplifier through current scaling technology and lowers the input-referred noise of the amplifier by combining a source degeneration resistor and current reuse technologies. The amplifier was fabricated using a 0.18 μm CMOS MS RF G process. The results show the front-end amplifier exhibits a measured mid-band gain of 40 dB/46 dB and a bandwidth ranging from 0.54 Hz to 6.1 kHz; the amplifier’s input-referred noise was measured to be 3.1 μVrms, consuming a current of 3.8 μA at a supply voltage of 1.8 V, with a Noise Efficiency Factor (NEF) of 2.97. The single amplifier’s active silicon area is 0.082 mm2.
Databáze: Directory of Open Access Journals