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A 4μW, ADPLL-based implantable amperometric biosensor in 65nm CMOS

Agarwal, Abhinav and Gural, Albert and Monge, Manuel and Adalian, Dvin and Chen, Sampson and Scherer, Axel and Emami, Azita (2017) A 4μW, ADPLL-based implantable amperometric biosensor in 65nm CMOS. In: 2017 Symposium on VLSI Circuits. IEEE , Piscataway, NJ, C108-C109. ISBN 978-4-86348-614-0.

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This paper presents a fully implantable, wirelessly powered subcutaneous amperometric biosensor. We propose a novel ultra-low power all-digital phase-locked loop (ADPLL) based potentiostat architecture for electrochemical sensing. The system is wirelessly powered by near-field RF coupling of an on-chip antenna to an external coil at 915 MHz. Bi-directional wireless telemetry supports data transmission from the sensor to the external reader (uplink) via backscattering, and reconfiguration of the sensor chip over the RF downlink. The 1.2×1.2 mm2 prototype is fabricated in TSMC 65nm CMOS process. The potentiostat achieves a 100pA sensitivity over a full scale current range of 0–350nA. The total power consumption of the system is 4μW.

Item Type:Book Section
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Monge, Manuel0000-0001-9799-0693
Emami, Azita0000-0003-2608-9691
Additional Information:© 2017 IEEE.
Record Number:CaltechAUTHORS:20170816-163154635
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Official Citation:A. Agarwal et al., "A 4μW, ADPLL-based implantable amperometric biosensor in 65nm CMOS," 2017 Symposium on VLSI Circuits, Kyoto, Japan, 2017, pp. C108-C109. doi: 10.23919/VLSIC.2017.8008566
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80530
Deposited By: Kristin Buxton
Deposited On:16 Aug 2017 23:40
Last Modified:15 Nov 2021 19:36

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