A 10-bit, 771 nW Time-Mode ADC with a 2-Step TDC for Bio-Signal Acquisition

Emmanouil Kandilakis, Wouter A. Serdijn, Omer Can Akgun

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

34 Downloads (Pure)

Abstract

In this paper, we present the design of a low-voltage, low-power, and small-area time-mode ADC (TM-ADC) for bio-signal sensing applications. The proposed time-mode ADC (TM-ADC) consists of a programmable oversampling ratio (OSR), voltage-controlled ring oscillator (VCRO) based analog-to-time converter (ATC), followed by an asynchronous unfolded SAR coarse TDC and an asynchronous, enhanced-range fine flash TDC. The integrated circuit has been implemented in a standard CMOS 65 nm process and its performance has been evaluated through extracted transient noise simulations. The ADC consumes 771 nW at a sampling rate of 2.2 kHz from a 0.5V supply voltage and achieves 10-bit resolution in a total area of 0.014 mm2. The simulation results indicate DNL and INL values of +0.86/-0.83 and +0.88/-1.79, respectively, an SNDR of 60.7 dB and an ENOB of 9.8 bits for a 10mV peak-to-peak signal 1kHz input signal.
Original languageEnglish
Title of host publicationBioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings
Subtitle of host publicationProceedings
PublisherIEEE
Pages1-6
Number of pages6
ISBN (Electronic)978-1-7281-7204-0
ISBN (Print)978-1-7281-7205-7
DOIs
Publication statusPublished - 2021
Event2021 IEEE Biomedical Circuits and Systems Conference (BioCAS) - Virtual at Berlin, Germany
Duration: 6 Oct 20219 Oct 2021

Publication series

NameBioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings

Conference

Conference2021 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Country/TerritoryGermany
CityVirtual at Berlin
Period6/10/219/10/21

Keywords

  • Bio-signal sensing
  • time-mode operation
  • analog-to-time conversion
  • two-step
  • time-to-digital conversion

Fingerprint

Dive into the research topics of 'A 10-bit, 771 nW Time-Mode ADC with a 2-Step TDC for Bio-Signal Acquisition'. Together they form a unique fingerprint.

Cite this