A New Temperature Independent Current Controlled Oscillator

doi:10.1109/ISPACS.2011.6146192

淡江大學機構典藏 > 工學院 > 電機工程學系暨研究所 > 會議論文 > Item 987654321/75310

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题名:	A New Temperature Independent Current Controlled Oscillator
作者:	Huang, Zheng-yi;Chiang, Jen-shiun;Yang, Wei-bin;Wang, Chi-hsiung
贡献者:	淡江大學電機工程學系
关键词:	current controlled ring oscillator;temperature independent current reference
日期:	2011-12
上传时间:	2012-03-19 16:12:03 (UTC+8)
出版者:	Intelligence Signal Processing and Communication Systems
摘要:	This paper describes a circuit, which generates a low temperature-dependent 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, supply current to the current controlled ring oscillator (CCO). Because of the oscillation frequency of CCO is proportional to temperature, the current is designed to be inversely proportional to temperature to compensate the temperature variation of CCO. There are four different oscillation frequency with temperature compensation has been completed, they are 10MHz, 20MHz, 30MHz and 40MHz respectively. 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. The temperature coefficient of the proposed CCO is 24 ppm/℃ in the temperature range between -25 and 75℃ at 10MHz. In the 20MHz, 30MHz and 40MHz oscillation frequency, the temperature coefficients are 32 ppm/℃, 38 ppm/℃ and 34 ppm/℃ respectively.
關聯:	Intelligent Signal Processing and Communications Systems (ISPACS), 2011 International Symposium on, pp.1-4
DOI:	10.1109/ISPACS.2011.6146192
显示于类别:	[電機工程學系暨研究所] 會議論文

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