A 0.006mm² 1.2μ W Analogue-to-Time Converter for Asynchronous Bio-Sensors

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Title: A 0.006mm² 1.2μ W Analogue-to-Time Converter for Asynchronous Bio-Sensors
Author(s): 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.
Publication Date: 1-Sep-2018
Date of Acceptance: 17-Jun-2018
URI: http://hdl.handle.net/10044/1/61566
ISSN: 0018-9200
Publisher: Institute of Electrical and Electronics Engineers
Start Page: 1
End Page: 10
Journal / Book Title: IEEE Journal of Solid-State Circuits
Copyright Statement: This paper is embargoed until publication. Once published it will be available fully open access.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/M020975/1
Copyright Statement: This paper is embargoed until publication. Once published it will be available fully open access.
Keywords: 0906 Electrical And Electronic Engineering
Electrical & Electronic Engineering
Publication Status: Accepted
Embargo Date: publication subject to indefinite embargo
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering



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