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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/70341

    Title: CMOS oversampling ΔΣ magnetic to digital converters
    Authors: Ho, Lee-an;Chen, Shr-lung;Kuo, Chien-hung;Liu, Shen-iuan
    Contributors: 淡江大學電機工程學系
    Date: 2001-05
    Issue Date: 2011-10-23 21:11:38 (UTC+8)
    Publisher: IEEE
    Abstract: In this paper, two CMOS oversampling delta-sigma (ΔΣ) magnetic-to-digital converters (MDCs) are proposed. The first MDC consists of the magnetic operational amplifier (MOP) and a first-order switched-capacitor (SC) ΔΣ modulator. The second one directly uses the MOP to realize a first-order SC ΔΣ modulator. They can convert the external magnetic field into digital form. Both circuits were fabricated in a 0.5-μm CMOS double-poly double-metal (DPDM) process and operated at a 5-V supply voltage and the nominal sampling rate of 2.5 MHz. The dynamic ranges of these converters are at least ±100 mT. The gain errors within ±100 mT are less than 3% and the minimum detectable magnetic field can reach as small as 1 mT. The resolutions are 100 μT for both of the two MDCs. The measured sensitivities are 1.327 mv/mT and 0.45 mv/mT for the first and the second MDC, respectively.
    Relation: The 2001 IEEE International Symposium on Circuits and Systems,pp.1582 - 1586
    DOI: 10.1109/4.953488
    Appears in Collections:[Graduate Institute & Department of Electrical Engineering] Proceeding

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