Temperature Insensitive Current Reference for the 6.27 MHz Oscillator

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Title:	Temperature Insensitive Current Reference for the 6.27 MHz Oscillator
Authors:	Yang, Wei-bin;Huang, Zheng-yi;Cheng, Ching-tsan;Lo, Yu-lung
Contributors:	淡江大學電機工程學系
Keywords:	current reference;ring oscillator
Date:	2011-12-14
Issue Date:	2012-03-19 16:05:51 (UTC+8)
Publisher:	NanYang Technological University; IEEE Singapore Section
Abstract:	This paper describes a circuit, which generates temperature-independent bias currents. In this paper, low- temperature coefficient reference is presented. The circuit is firstly employed to generate a current reference with temperature compensation, then combining the opposite characteristic curve current reference to minimize the variation of temperature. The proposed circuit has been design by a 0.18um CMOS technology process and using computer simulation to evaluate the thermal drift of the reference current. This current reference is used to provide a stable current for a current controlled oscillator(CCO). The proposed CCO achieves temperature coefficients of 22.3 ppm/c in the temperature range between -25 and 75c.
Relation:	2011 13th International Symposium on Integrated Circuits (ISIC), Singapore, pp.559-562
DOI:	10.1109/ISICir.2011.6131924
Appears in Collections:	[Graduate Institute & Department of Electrical Engineering] Proceeding

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