Tunable low noise amplifier implementation with low distortion pseudo-resistance for in vivo brain activity measurement

Kárász, Zoltán and Földesy, Péter and Fiáth, Richárd and Rodríguez-Vázquez, Angel (2013) Tunable low noise amplifier implementation with low distortion pseudo-resistance for in vivo brain activity measurement. IEEE SENSORS JOURNAL, 14 (5). pp. 1357-1363. ISSN 1530-437X

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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 90nm technology.

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