A low-power fast start-up crystal oscillator with an autonomous dynamically adjusted load

Ming Ding (Corresponding author), Yao Hong Liu, Pieter Harpe, Christian Bachmann, Kathleen Philips, Arthur van Roermund

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Samenvatting

An energy-efficient fast start-up method for crystal oscillators is presented, which enables aggressive duty-cycled operation of IoT radios to minimize overall power consumption. A digitally controlled crystal oscillator using the proposed start-up technique in 90-nm CMOS is presented. Thanks to the dynamically adjusted load, the negative resistance is boosted, achieving a 13 × start-up time reduction and an overall power of 95μ W for a 24-MHz crystal oscillator at 1 V. A fully autonomous feedback loop detects the oscillators envelop and adjusts the load capacitance at start-up. Thanks to the low-power start-up circuits, both the start-up time and the start-up energy are reduced. In addition, the robustness and versatility of the proposed method is verified by measuring quartz crystals with different frequencies and quality factors, as well as measuring against temperature, supply voltage, and load capacitance variations.

Originele taal-2Engels
Artikelnummer8544016
Pagina's (van-tot)1382-1392
Aantal pagina's11
TijdschriftIEEE Transactions on Circuits and Systems I: Regular Papers
Volume66
Nummer van het tijdschrift4
DOI's
StatusGepubliceerd - 1 apr 2019

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