A 51-nW 32.7-kHz CMOS relaxation oscillator with half-period pre-charge compensation scheme for ultra-low power systems
In: EI, 2016
Online
Konferenz
Zugriff:
This paper presents a temperature and supply voltage variation-tolerant CMOS relaxation oscillator which is suitable for ultra-low power systems. A low-power low-cost half-period pre-charge compensation scheme is proposed to eliminate influences of the delay of the comparator and the RS latch on the frequency stability of the relaxation oscillator. In a clock period consisting of four working stages including normal charge, discharge, pre-charge and hold stage, the threshold voltage of comparators is adjusted dynamically. A 32.7-kHz relaxation oscillator with the proposed half-period pre-charge compensation scheme is implemented in a TSMC 0.18-��m CMOS process, occupying a silicon area of 0.048 mm2. Simulation results show that the proposed relaxation oscillator consumes 51-nW at room temperature from 0.6-V power supply, and temperature stability of 43.1 ppm/��C from -55 ��C to 125 ��C and ��0.60% frequency variation with supply voltage from 0.5 V to 1.0 V are achieved. ? 2016 IEEE. ; EI ; 830-833 ; 2016-July
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A 51-nW 32.7-kHz CMOS relaxation oscillator with half-period pre-charge compensation scheme for ultra-low power systems
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| Autor/in / Beteiligte Person: | Zheng, Yongan ; Zhou, Lili ; Tian, Fan ; He, Mingxiao ; Liao, Huailin ; Key Laboratory of Microelectronic Devices and Circuits (MOE), Institute of Microelectronics, Peking University, Beijing, 100871, China |
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| Zeitschrift: | EI, 2016 |
| Veröffentlichung: | 2016 IEEE International Symposium on Circuits and Systems, ISCAS, 2016 |
| Medientyp: | Konferenz |
| ISBN: | 978-1-4799-5340-0 (print) ; 1-4799-5340-7 (print) |
| DOI: | 10.1109/ISCAS.2016.7527369 |
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