Artículo
A 515 nW, 0-18 dB programmable gain analog-to-digital converter for in-channel neural recording interfaces
Autor/es | Rodríguez Pérez, Alberto
Delgado Restituto, Manuel Medeiro Hidalgo, Fernando |
Departamento | Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Fecha de publicación | 2014 |
Fecha de depósito | 2018-05-21 |
Publicado en |
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Resumen | This paper presents a low-area low-power Switched-Capacitor (SC)-based Programmable-Gain Analog-to-Digital Converter (PG-ADC) suitable for in-channel neural recording applications. The PG-ADC uses a novel implementation ... This paper presents a low-area low-power Switched-Capacitor (SC)-based Programmable-Gain Analog-to-Digital Converter (PG-ADC) suitable for in-channel neural recording applications. The PG-ADC uses a novel implementation of the binary search algorithm that is complemented with adaptive biasing techniques for power saving. It has been fabricated in a standard CMOS 130 nm technology and only occupies 0.0326∼mm}2. The PG-ADC has been optimized to operate under two different sampling modes, 27 kS/s and 90 kS/s. The former is tailored for raw data conversion of neural activity, whereas the latter is used for the on-the-fly feature extraction of neural spikes. Experimental results show that, under a voltage supply of 1.2 V, the PG-ADC obtains an ENOB of 7.56 bit (8-bit output) for both sampling modes, regardless of the gain setting. The amplification gain can be programmed from 0 to 18 dB. The power consumption of the PG-ADC at 90 kS/s is 1.52μW with a FoM of 89.49 fJ/conv, whereas at 27 kS/s it consumes 515 nW and obtains a FoM of 98.31 fJ/conv. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Junta de Andalucía |
Identificador del proyecto | TEC2009-08447
TEC2012-33634 TIC-02818 |
Cita | Rodríguez Pérez, A., Delgado Restituto, M. y Medeiro Hidalgo, F. (2014). A 515 nW, 0-18 dB programmable gain analog-to-digital converter for in-channel neural recording interfaces. IEEE Transactions on Biomedical Circuits and Systems, 8, 358-370. |
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