Magnetic-to-digital converters using single-amplifier-based second-order delta-sigma modulators

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Title:	Magnetic-to-digital converters using single-amplifier-based second-order delta-sigma modulators
Authors:	郭建宏;Kuo, Chien-hung;Chen Shr-lung;Liu Shen-iuan
Contributors:	淡江大學電機工程學系
Date:	2004-04
Issue Date:	2010-03-26 21:42:58 (UTC+8)
Publisher:	Piscataway: Institute of Electrical and Electronics Engineers (IEEE)
Abstract:	In this paper, two magnetic-to-digital converters (MDCs) using single-amplifier-based second-order delta-sigma modulators (DSMs) are presented to detect the dc magnetic field. The proposed second-order DSM required only a single-operational amplifier to achieve the second-order noise shaping. Both the proposed circuits have been fabricated in a 0.5-μm CMOS DPDM process, and the resolution of 11 bits can be achieved. The measured sensitivities are 1.486 and 0.459 mV/mT, and the minimum detectable magnetic fields are 0.6 mT and 0.4 mT for the MDC with and without the pre-amplifier, respectively. Both the measured nonlinearities are smaller than 1.3% within the range of ± 100 mT.
Relation:	IEEE Sensors Journal 4(2), pp.226-231
DOI:	10.1109/JSEN.2004.823685
Appears in Collections:	[Graduate Institute & Department of Electrical Engineering] Journal Article

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