A 0.9V-VDD sub-nW resistor-less duty-cycled CMOS voltage reference in 65nm for IoT

M. Liu, A. van Roermund, P. Harpe

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This paper presents a 0.9V-VDD sub-nW CMOS voltage reference based on dynamic operation with the absence of large resistors, hence occupying small chip area. The proposed voltage reference is based on the threshold voltage difference between high-Vt and normal-Vt transistors. Switched capacitors are used instead of resistors to reduce chip area and to enable dynamic operation. Moreover, the dynamic operation can achieve a low average power while still supporting a large active power, needed to overcome leakage side-effects during the active period. A current biasing scheme is introduced to guarantee a proper operating point and to stabilize performance as well as power consumption over a large temperature range from -40 to 125°C. The simulated voltage reference in 65nm CMOS consumes 0.33nW at room temperature and maintains sub-nW throughout the temperature range with 2.34% active time. At 5 corners, the reference voltage Huctuates with 3% at room temperature and the temperature coefficient varies from 5.3∼31.3ppm/°C. The resistor-less voltage reference only occupies a chip area of 4600μm2. The sub-nW power consumption, small chip area and low temperature coefficient in wide temperature range make this design an eligible voltage reference solution to low-power systems like IoT.

Originele taal-2Engels
TitelIEEE International Symposium on Circuits and Systems
SubtitelFrom Dreams to Innovation, ISCAS 2017 - Conference Proceedings
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
Aantal pagina's4
ISBN van elektronische versie978-1-4673-6853-7
StatusGepubliceerd - 25 sep. 2017
Evenement2017 IEEE International Symposium on Circuits and Systems (ISCAS) - Baltimore, MD, USA, Baltimore, Verenigde Staten van Amerika
Duur: 28 mei 201731 mei 2017
Congresnummer: 50


Congres2017 IEEE International Symposium on Circuits and Systems (ISCAS)
Verkorte titelISCAS 2017
Land/RegioVerenigde Staten van Amerika


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