Title :
Design of 4-channel analog front-ends for neural signal acquisition
Author :
Hu Shaonan ; Qu Ruoyuan ; Yang Haidong
Author_Institution :
Inf. & Electron. Sch., Beijing Inst. of Technol., Beijing, China
Abstract :
A 4-channel analog front-ends designed for neural signal acquisition is demonstrated in this paper. Each channel consists of a high input impedance, high gain, low noise and high linearity amplifier and a high precision Σ-Δ analog to digital convertor (ADC). The amplifier is realized with a capacitive feedback closed loop op-amp. Fabricated in 180nm CMOS process, the 4-channel system occupies 2.34mm2 while achieving a resolution of 0.9μV and the equivalent input-referred noise of 3.06μV according to the chip test results.
Keywords :
CMOS integrated circuits; analogue-digital conversion; low noise amplifiers; medical signal processing; Σ-Δ analog to digital convertor; 4-channel analog front-ends; 4-channel system; ADC; CMOS process; capacitive feedback; chip test; equivalent input-referred noise; high gain amplifier; high linearity amplifier; loop op-amp; low noise amplifier; neural signal acquisition; size 180 nm; voltage 0.9 muV; Educational institutions; Modulation; Sigma-delta modulation; Signal resolution; Signal to noise ratio; Switches; Σ-ΔADC; CMOS; electorneurographic signal; folded cascade amplifier; multi-channel;
Conference_Titel :
Advanced Research and Technology in Industry Applications (WARTIA), 2014 IEEE Workshop on
Conference_Location :
Ottawa, ON
DOI :
10.1109/WARTIA.2014.6976525
