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A Low Noise Amplifier for Neural Spike Recording Interfaces

Opened Access A Low Noise Amplifier for Neural Spike Recording Interfaces

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Autor: Ruiz Amaya, Jesús
Rodríguez Pérez, Alberto
Delgado Restituto, Manuel 
Fecha: 2015
Publicado en: Sensors, 15, 25313-25335.
Tipo de documento: Artículo
Resumen: This paper presents a Low Noise Amplifier (LNA) for neural spike recording applications. The proposed topology, based on a capacitive feedback network using a two-stage OTA, efficiently solves the triple trade-off between power, area and noise. Additionally, this work introduces a novel transistor-level synthesis methodology for LNAs tailored for the minimization of their noise efficiency factor under area and noise constraints. The proposed LNA has been implemented in a 130 nm CMOS technology and occupies 0.053 mm-sq. Experimental results show that the LNA offers a noise efficiency factor of 2.16 and an input referred noise of 3.8 Vrms for 1.2 V power supply. It provides a gain of 46 dB over a nominal bandwidth of 192 Hz–7.4 kHz and consumes 1.92 W. The performance of the proposed LNA has been validated through in vivo experiments with animal models
Cita: Ruiz Amaya, J., Rodríguez Pérez, A. y Delgado Restituto, M. (2015). A Low Noise Amplifier for Neural Spike Recording Interfaces. Sensors, 15, 25313-25335.
Tamaño: 783.5Kb
Formato: PDF

URI: https://hdl.handle.net/11441/74310

DOI: 10.3390/s151025313

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