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A 0.4V 4.8μW 16MHz CMOS crystal oscillator achieving 74-fold startup-time reduction using momentary detuning
Ka-Meng Lei1; Pui-In Mak1; R. P. Martins1,2
2017-09-25
Conference NameIEEE International Symposium on Circuits and Systems (ISCAS)
Source PublicationProceedings - IEEE International Symposium on Circuits and Systems
Pages2791-2794
Conference DateMAY 28-31, 2017
Conference PlaceBaltimore, MD
CountryUSA
PublisherIEEE
Abstract

For ultra-low-power radios, the long startup time of the crystal oscillator dominates their on-off latency and limits their power efficiency. This paper describes the design of a 65nm CMOS 16MHz crystal oscillator, featuring a momentary detuning scheme to accelerate the startup transient. Specifically, during the startup phase, the bias current (266μA) and loading capacitors (8.5pF each) are enlarged concurrently such that the equivalent negative resistance of the oscillation loop can be momentarily enhanced, resulting in 74-fold reduction of the startup time (37ms → 0.5ms), while consuming just 53.2nJ at 0.4V. Also, a time-based controller automatically drives the oscillator into the steady state, which entails a smaller bias current (12μA) to sustain the oscillation, and smaller loading capacitors (5pF) to recover the proper oscillating frequency. The simulated phase noise exhibits -128.2dBc/Hz at 1kHz offset, resulting in a FoM of 265.5dBc/Hz.

KeywordCmos Crystal Oscillator Fast Startup Low-power Low-voltage Ultra-low-power
DOIhttp://doi.org/10.1109/ISCAS.2017.8051002
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000439261800211
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Citation statistics
Document TypeConference paper
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.The State Key Laboratory of Analog and Mixed-Signal VLSI and FST-ECE, University of Macau, Macao, China
2.On leave from Instituto Superior Técnico, Universidade de Lisboa, Portugal
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Ka-Meng Lei,Pui-In Mak,R. P. Martins. A 0.4V 4.8μW 16MHz CMOS crystal oscillator achieving 74-fold startup-time reduction using momentary detuning[C]:IEEE,2017:2791-2794.
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