Design of a micro power amplifier for neural signal recording

Author

Ben Hmida, Ghazi ; Kachouri, Abdennaceur ; Ghariani, Hamadi

Author_Institution

Electr. Eng. Dept., Nat. Eng. Sch. of Sfax, Sfax

fYear

2009

fDate

6-9 April 2009

Firstpage

270

Lastpage

274

Abstract

This paper describes a micro power amplifier for neural signal recording. We describe an amplifier using a differential pair as input stage. Given that neural amplifiers must include differential input pair to achieve a high common-mode rejection ratio (CMRR). The amplifier has been designed in the AMS 0.35 mum, 3-metal, 2-poly, n-well standard CMOS process. The amplifier current consumption is 4.61 muA at plusmn1 V supply, which gives a power consumption of 9.22 muW. The CMRR is 113 dB and the power supply rejection ratio (PSRR > 73 dB). The input referred noise is 14.8 muVrms over 100~10 KHz. The amplifier gives an input DC offset of 196 muV and an output swing of plusmn0.8 V with minimum distortion.

Keywords

CMOS analogue integrated circuits; bioelectric potentials; biomedical electronics; differential amplifiers; integrated circuit design; low-power electronics; neurophysiology; power amplifiers; 3-metal 2-poly n-well standard CMOS process; CMRR; DC offset; amplifier current consumption; common-mode rejection ratio; current 4.61 muA; differential input pair; micropower amplifier design; neural signal recording; power 9.22 muW; power supply rejection ratio; size 0.35 mum; Bioelectric phenomena; Differential amplifiers; Frequency; Low-noise amplifiers; Operational amplifiers; Power amplifiers; Power supplies; Robustness; Signal design; Signal processing; CMRR; DC offset; Neural signal recording; gain; low noise; micro power amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Design & Technology of Integrated Systems in Nanoscal Era, 2009. DTIS '09. 4th International Conference on

Conference_Location

Cairo

Print_ISBN

978-1-4244-4320-8

Electronic_ISBN

978-1-4244-4321-5

Type

conf

DOI

10.1109/DTIS.2009.4938069

Filename

4938069