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A 0.006mm² 1.2μW analogue-to-time converter for asynchronous bio-sensors
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08417925.pdf | Published version | 2.44 MB | Adobe PDF | View/Open |
Title: | A 0.006mm² 1.2μW analogue-to-time converter for asynchronous bio-sensors |
Authors: | Leene, L Constandinou, TG |
Item Type: | Journal Article |
Abstract: | This work presents a low-power analogue-to-time converter (ATC) for integrated bio-sensors. The proposed circuit facilitates the direct conversion of electrode biopotential recordings into time-encoded digital pulses with high efficiency without prior signal amplification. This approach reduces the circuit complexity for multi-channel instrumentation systems and allows asynchronous digital control to maximise the potential power savings during sensor inactivity. A prototype fabricated using a 65nm CMOS technology is demonstrated with measured characteristics. Experimental results show an input-referred noise figure of 3.8μ Vrms for a 11kHz signal bandwidth while dissipating 1.2μ W from a 0.5V supply and occupying 60 ×80μ m² silicon area. This compact configuration is enabled by the proposed asynchronous readout that shapes the mismatch components arising from the multi-bit quantiser and the use of capacitive feedback. |
Issue Date: | 1-Sep-2018 |
Date of Acceptance: | 17-Jun-2018 |
URI: | http://hdl.handle.net/10044/1/61566 |
DOI: | https://dx.doi.org/10.1109/JSSC.2018.2850918 |
ISSN: | 0018-9200 |
Publisher: | Institute of Electrical and Electronics Engineers |
Start Page: | 2604 |
End Page: | 2613 |
Journal / Book Title: | IEEE Journal of Solid-State Circuits |
Volume: | 53 |
Issue: | 9 |
Copyright Statement: | © 2018 The Author(s). This work is licensed under a Creative Commons Attribution 3.0 License. Formore information, see http://creativecommons.org/licenses/by/3.0 |
Sponsor/Funder: | Engineering & Physical Science Research Council (EPSRC) Engineering & Physical Science Research Council (EPSRC) |
Funder's Grant Number: | EP/M020975/1 EP/K015060/1 |
Keywords: | Science & Technology Technology Engineering, Electrical & Electronic Engineering Analog-to-time conversion asynchronous bio-sensor delta-sigma instrumentation low noise low voltage PHASE-NOISE ADC AMPLIFIERS FILTER 0906 Electrical and Electronic Engineering Electrical & Electronic Engineering |
Publication Status: | Published |
Online Publication Date: | 2018-07-23 |
Appears in Collections: | Electrical and Electronic Engineering Faculty of Engineering |