A 250 kHz resistive frequency-locked on-chip oscillator with 24.7 ppm/°C temperature stability and 2.73 ppm long-term stability

Sheng Kai Chang, Zhi Ting Tsai, Kuang Wei Cheng

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

Abstract

This work presents a resistive frequency-locked loop on-chip oscillator with a double chopper stabilization technique to improve the temperature stability and long-term stability. The negative feedback topology achieves both a low temperature coefficient (TC) and good energy efficiency. A prototype device is fabricated in 0.18-μm CMOS technology and exhibits a 24.7 ppm/ºC temperature stability and 2.73 ppm long-term stability while consuming just 293 nW under an oscillation frequency of 250 kHz. The use of the double chopper stabilization technique effectively eliminates the TC-sensitive non-idealities, including the current mismatch and offset voltage of the amplifier. Moreover, the low-frequency flicker noise is also mitigated; resulting in a 16X improvement in the long-term stability.

Original languageEnglish
Title of host publication2020 IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728133201
Publication statusPublished - 2020
Event52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Virtual, Online
Duration: 2020 Oct 102020 Oct 21

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2020-October
ISSN (Print)0271-4310

Conference

Conference52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020
CityVirtual, Online
Period20-10-1020-10-21

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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