TY - JOUR
T1 - An Inductively-Powered Wireless Neural Recording System With a Charge Sampling Analog Front-End
AU - Lee, Seung Bae
AU - Lee, Byunghun
AU - Kiani, Mehdi
AU - Mahmoudi, Babak
AU - Gross, Robert
AU - Ghovanloo, Maysam
N1 - Funding Information:
This work was supported in part by the National Institutes of Health under Grant 1R21EB018561 and Grant 5R21EB009437 and in part by the Directorate for Biological Sciences through the National Science Foundation under Award ECCS-1408318 and Award IIP-1346416. The associate editor coordinating the review of this paper and approving it for publication was Prof. Danilo Demarchi. (Corresponding author: Maysam Ghovanloo.) The authors would like to thank members of the GT-Bionics Lab for their help in the original design and benchtop testing of the WINeR-7 system.
Publisher Copyright:
© 2016 IEEE.
PY - 2016/1/15
Y1 - 2016/1/15
N2 - An inductively-powered wireless integrated neural recording system (WINeR-7) is presented for wireless and battery-less neural recording from freely-behaving animal subjects inside a wirelessly powered standard homecage. The WINeR-7 system employs a novel wide-swing dual slope charge sampling (DSCS) analog front-end (AFE) architecture, which performs amplification, filtering, sampling, and analog-to-time conversion with minimal interference and small amount of power. The output of the DSCS-AFE produces a pseudodigital pulse-width modulated (PWM) signal. A circular shift register time-division multiplexes (TDM) the PWM pulses to create a TDM-PWM signal, which is fed into an on-chip 915-MHz transmitter (Tx). The AFE and Tx are supplied at 1.8 and 4.2 V, respectively, by a power management block, which includes a high efficiency active rectifier and automatic resonance tuning, operating at 13.56 MHz. The eight-channel system-on-a-chip was fabricated in a 0.35-μm CMOS process, occupying 5 × 2.5 mm2 and consumed 51.4 mW. For each channel, the sampling rate is 21.48 kHz and the power consumption is 19.3 μW. In vivo experiments were conducted on freely-behaving rats in an energized homecage by continuously delivering 51.4 mW to the WINeR-7 system in a closed-loop fashion and recording local field potentials.
AB - An inductively-powered wireless integrated neural recording system (WINeR-7) is presented for wireless and battery-less neural recording from freely-behaving animal subjects inside a wirelessly powered standard homecage. The WINeR-7 system employs a novel wide-swing dual slope charge sampling (DSCS) analog front-end (AFE) architecture, which performs amplification, filtering, sampling, and analog-to-time conversion with minimal interference and small amount of power. The output of the DSCS-AFE produces a pseudodigital pulse-width modulated (PWM) signal. A circular shift register time-division multiplexes (TDM) the PWM pulses to create a TDM-PWM signal, which is fed into an on-chip 915-MHz transmitter (Tx). The AFE and Tx are supplied at 1.8 and 4.2 V, respectively, by a power management block, which includes a high efficiency active rectifier and automatic resonance tuning, operating at 13.56 MHz. The eight-channel system-on-a-chip was fabricated in a 0.35-μm CMOS process, occupying 5 × 2.5 mm2 and consumed 51.4 mW. For each channel, the sampling rate is 21.48 kHz and the power consumption is 19.3 μW. In vivo experiments were conducted on freely-behaving rats in an energized homecage by continuously delivering 51.4 mW to the WINeR-7 system in a closed-loop fashion and recording local field potentials.
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U2 - 10.1109/JSEN.2015.2483747
DO - 10.1109/JSEN.2015.2483747
M3 - Article
AN - SCOPUS:84961710649
SN - 1530-437X
VL - 16
SP - 475
EP - 484
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 2
M1 - 7283536
ER -