Title :
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
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;
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
DOI :
10.1109/DTIS.2009.4938069
