Please use this identifier to cite or link to this item: http://rportal.lib.ntnu.edu.tw:80/handle/77345300/32208
Title: CMOS oversampling ΔΣ magnetic-to-digital converters
Authors: 國立臺灣師範大學電機工程學系
Chien-Hung Kuo
Shr-Lung Chen
Lee-An Ho
Shen-Iuan Liu
Issue Date: 1-Oct-2001
Publisher: IEEE Solid-State Circuits Society
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
URI: http://rportal.lib.ntnu.edu.tw/handle/77345300/32208
ISSN: 0018-9200�
Other Identifiers: ntnulib_tp_E0610_01_009
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