11 nW Signal Acquisition Platform for Remote Biosensing

Alberto Gancedo Reguilon, Ömer Can Akgün, Wouter A. Serdijn

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
21 Downloads (Pure)


This paper presents the design of an extremely low-energy biosensing platform that utilizes voltage to time conversion and time-mode signal processing to sense and accommodate electrophysiological biosignals that will be later sent remotely using a simple and low power communication scheme. The electrode input is fed to a chain of monostable multivibrators used as analog-to-time converters, which create time pulses whose widths are proportional to the input signal. These pulses are transmitted to an external receiver by means of single-pulse harmonic modulation as the communication scheme, at a carrier frequency of 10 MHz. The platform is designed to be implemented in a standard 0.18μm IC process with an energy dissipation per sample per channel of 42.72 pJ, including communication, operating from a supply voltage of 0.6V with an input referred noise of 12.3 μVrms. The resulting SNR for OSR=256 is 35.19 dB, and the system’s power consumption at a sampling and communication rate of 256 Hz is 10.94 nW.
Original languageEnglish
Title of host publicationBioCAS 2019 - Biomedical Circuits and Systems Conference, Proceedings
Number of pages4
ISBN (Electronic)978-1-5090-0617-5
Publication statusPublished - 1 Oct 2019
EventBiomedical Circuits and Systems Conference 2019 - Nara, Japan
Duration: 17 Oct 201919 Oct 2019


ConferenceBiomedical Circuits and Systems Conference 2019
Abbreviated titleBioCAS 2019
Internet address


  • EEG
  • inductive link
  • low-power CMOS
  • time-mode operation
  • ultra-low energy


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