Tunable Low Noise Amplifier Implementation With Low Distortion Pseudo-Resistance for in Vivo Brain Activity Measurement

Author

Karasz, Zoltan ; Fiath, Richard ; Foldesy, Peter ; Rodriguez Vazquez, Angel

Author_Institution

Inst. of Comput. Sci. & Control, Budapest, Hungary

Volume

14

Issue

5

fYear

2014

fDate

May-14

Firstpage

1357

Lastpage

1363

Abstract

This paper presents a low power neural signal amplifier with tunable cut-off frequencies. The presented compact amplifier, which is used for sensing various types of neural signals, reduces the size and the power consumption of the whole circuit. The distinguishing features of this solution are the large time constant, linearity, and small achievable area, which are realized with a configurable series of pseudo resistances. The proof of concept has been manufactured on TSMC 90 nm technology.

Keywords

bioelectric phenomena; biomedical electronics; biomedical measurement; brain; low noise amplifiers; low-power electronics; neurophysiology; TSMC technology; compact amplifier; in vivo brain activity measurement; large time constant; linearity; low distortion pseudoresistance; low power neural signal amplifier; power consumption; size 90 nm; small achievable area; tunable low noise amplifier implementation; Capacitance; Cutoff frequency; Noise; Resistance; Resistors; Sensors; Transistors; Brain-computer interface; LFP; common-mode feedback; fully differential OTA; large time constant; neuro-amplifier; pseudo-resistor;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2013.2294971

Filename

6683008