A 0.98-nW/kHz 33-kHz Fully Integrated Subthreshold-Region Operation RC Oscillator with Forward-Body-Biasing

Philex Ming Yan Fan, Anand Savanth, Benoit Labbe, Pranay Prabhat, James Myers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The lower bound on the power expended by an RC relaxation oscillator is decided by the RC network. This can be minimized by reducing the oscillation swing and increasing R. In the former technique,tighter comparator constraints limit power benefits while the latter technique increases resistor thermal noise bounding long-term jitter. To this end,this letter presents a fully integrated RC oscillator with core voltage aggressively scaled to subthreshold levels. A self-clocked switched-capacitor network is used to minimize voltage drop-out power loss. Full forward-body-biasing technique helps reduce device on-resistance. Additionally,temperature coefficient compensation for time constant is accomplished by poly resistors and a VTH-tracking reference scheme which avoids the use of diffusion resistors. This design is silicon-proven on 65-nm CMOS (0.0356-mm2 area). The implementation has a 33-kHz clock with 32.2 nW at 1.2 V. Line sensitivity is within +0.7/-0.6% per volt across 16 samples for 1 to 1.5 V. Temperature sensitivity was measured to be 56 ppm/°C from 0 °C to 85 °C and measured Allan deviation <100 ppm for averaging interval of τ = 400 s and <40 ppm for τ = 3000 s.

Original languageEnglish
Title of host publicationESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages175-178
Number of pages4
ISBN (Electronic)9781728115504
DOIs
Publication statusPublished - 2019 Sep
Event45th IEEE European Solid State Circuits Conference, ESSCIRC 2019 - Cracow, Poland
Duration: 2019 Sep 232019 Sep 26

Publication series

NameESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference

Conference

Conference45th IEEE European Solid State Circuits Conference, ESSCIRC 2019
Country/TerritoryPoland
CityCracow
Period19-09-2319-09-26

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electronic, Optical and Magnetic Materials
  • Hardware and Architecture
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A 0.98-nW/kHz 33-kHz Fully Integrated Subthreshold-Region Operation RC Oscillator with Forward-Body-Biasing'. Together they form a unique fingerprint.

Cite this