Title :
An implantable CMOS amplifier for nerve signals
Author :
Nielsen, Jannik Hammel ; Lehmann, Torsten
Author_Institution :
Tech. Univ. Denmark, Lyngby, Denmark
fDate :
6/23/1905 12:00:00 AM
Abstract :
In this paper, a low noise high gain CMOS amplifier for minute nerve signals is presented. By using a mixture of weak- and strong inversion transistors, optimal noise suppression in the amplifier is achieved. A continuous-time offset-compensation technique is utilized in order to minimize impact on the amplifier input nodes. The method for signal recovery from noisy nerve signals is presented. A prototype amplifier is realized in a standard digital 0.5 μm CMOS single poly, n-well process. The prototype amplifier features a gain of 80 dB over a 3.6 kHz bandwidth, a CMRR of more than 87 dB and a PSRR greater than 84 dB. The equivalent input referred noise in the bandwidth of interest is 5 nV/√Hz. The amplifier power consumption is 275 μW
Keywords :
CMOS analogue integrated circuits; amplifiers; biomedical electronics; neurophysiology; 0.5 micron; 275 muW; 3.6 kHz; 80 dB; CMRR; PSRR; bandwidth; continuous-time offset compensation; equivalent input referred noise; gain; implantable CMOS amplifier; nerve signal; power consumption; signal recovery; strong inversion transistor; weak inversion transistor; Australia; Bandwidth; Control systems; Electrodes; Implants; Mars; Mechanical sensors; Muscles; Prototypes; Signal processing;
Conference_Titel :
Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on
Print_ISBN :
0-7803-7057-0
DOI :
10.1109/ICECS.2001.957427
