Title :
A 220nW neural amplifier for multi-channel neural recording systems
Author :
Kim, Jungsuk ; Moo Sung Chae ; Liu, Wentai
Author_Institution :
Dept. of Electr. Eng., Univ. of California at Santa Cruz, Santa Cruz, CA, USA
Abstract :
This paper presents a low-power neural amplifier for multi-channel neural recording systems. To achieve low power consumption and small die area, the single-branch amplifier, based on CMOS inverter, is employed along with a capacitive feedback loop. This amplifier has a gain of 28.9 dB and operates from plusmn0.9 V. The low-frequency cutoff is able to be varied from less than 100 Hz by adjusting the tuning voltage and the high-frequency cutoff is fixed at 11.2 KHz. The input-referred noise of this amplifier is 14.5 muVrms and it consumes a power of 220 nW. This low-power neural amplifier is fabricated in 0.35 mum CMOS process with active die areas of 200 mu times100 mum.
Keywords :
CMOS integrated circuits; amplifiers; invertors; low-power electronics; CMOS inverter; CMOS process; capacitive feedback loop; frequency 11.2 kHz; gain 28.9 dB; low-power neural amplifier; multichannel neural recording systems; neural amplifier; power 220 nW; size 0.35 mum; Circuit analysis; Differential amplifiers; Energy consumption; Feedback loop; Inverters; Operational amplifiers; Power amplifiers; Prosthetics; Rail to rail amplifiers; Voltage;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5117991
