Title :
A 77 nW bioamplifier with a tunable bandwidth for neural recording systems
Author :
Kazerouni, Iman Abaspur ; Dehrizi, Hadi Goodarzi ; Isfahani, Sayed Mohammad Mostafavi ; Zou, Zhuo ; Baghaei-Nejad, Majid ; Zheng, Li-Rong
Author_Institution :
Dept. of Electr. & Comput. Eng., Sabzevar Tarbiat Moallem Univ., Sabzevar, Iran
Abstract :
In this paper a low-power low-noise amplifier for neural recording and biomedical applications is presented. The frequency band of the amplifier is tunable. It has a gain of 28.3 dB. The low and the high cut-off frequency can be adjusted from 24 mHz to 30.6 Hz and 4.5 kHz to 7.47 kHz, respectively. The circuit is designed in 0.18μm CMOS process, and it consumes only 77.8 nW at 1.8V supply voltage. The simulation results show a 14.3μV input-referred noise corresponding to 1.32 efficiency factor (NEF). It is a great improvement compared with recent presented works in terms on power consumption and NEF which is vital in neural recording applications.
Keywords :
CMOS integrated circuits; biomedical electrodes; biomedical electronics; low noise amplifiers; low-power electronics; neurophysiology; patient diagnosis; power amplifiers; power consumption; CMOS process; biomedical applications; circuit design; efficiency factor; frequency 24 mHz to 30.6 Hz; frequency 4.5 kHz to 7.47 kHz; low-noise amplifier; low-power amplifier; neural electrodes; neural recording systems; power 77 nW; power 77.8 nW; power consumption; size 0.18 mum; tunable-bandwidth bioamplifier; voltage 1.8 V; voltage 14.3 muV; Bandwidth; Capacitors; Cutoff frequency; Electrodes; Gain; Noise; Power demand; Bioamplifier; Neural recording; Tuneable band width;
Conference_Titel :
Circuits and Systems (APCCAS), 2010 IEEE Asia Pacific Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-7454-7
DOI :
10.1109/APCCAS.2010.5774926
