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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
	Zheng, Yongan ; Zhou, Lili ; Tian, Fan ; He, Mingxiao ; Liao, Huailin
	2016
关键词	CMOS delay compensation dynamic threshold half-period pre-charge relaxation oscillator ultra-low power
英文摘要	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-mu m CMOS process, occupying a silicon area of 0.048 mm(2). 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/degrees C from -55 degrees C to 125 degrees C and +/- 0.60% frequency variation with supply voltage from 0.5 V to 1.0 V are achieved.; CPCI-S(ISTP); liaohl@pku.edu.cn; 830-833
语种	英语
出处	IEEE International Symposium on Circuits and Systems (ISCAS)
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459956]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zheng, Yongan,Zhou, Lili,Tian, Fan,et al. A 51-nW 32.7-kHz CMOS Relaxation Oscillator with Half-Period Pre-Charge Compensation Scheme for Ultra-Low Power Systems. 2016-01-01.

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