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Kim, Seong-Jin
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A 1.08-nW/kHz 13.2-ppm/°C Self-Biased Timer Using Temperature-Insensitive Resistive Current

Author(s)
Jung, JaehongKim, Ik-HwanKim, Seong-JinLee, YoonmyungChun, Jung-Hoon
Issued Date
2018-08
DOI
10.1109/JSSC.2018.2824307
URI
https://scholarworks.unist.ac.kr/handle/201301/24364
Fulltext
https://ieeexplore.ieee.org/document/8367798/
Citation
IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.53, no.8, pp.2311 - 2318
Abstract
This paper proposes a 32.7 kHz self-biased wake-up timer using temperature-insensitive resistive current. A dual-loop structure with supply-regulation loop and frequency-locked loop determines the regulated voltages at both ends of a temperature-compensated resistor and cancels out the amplifier offset voltages, thus generating temperature-insensitive resistive current for the switched capacitor. Moreover, a self-biasing scheme in low-power design reduces the power variation across the temperature range and eliminates the necessity of a sub-μA reference current generator. The proposed timer with its start-up circuit generates <12 ms lock time, which is 20 times less than what obtained without a start-up circuit, and exhibits a long-term frequency stability of 10 ppm and a temperature coefficient of 13.2 ppm/°C with an energy efficiency of 1.08 nW/kHz.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
ISSN
0018-9200
Keyword (Author)
Allan deviationlow poweroscillatorsRC-time constanttemperature sensitivitywake-up timer
Keyword
OSCILLATORNW

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