Magnetic-to-Digital Converters Using Single-Amplifier-Based Second-Order Delta-Sigma Modulators

Chien Hung Kuo; Shr Lung Chen; Shen Iuan Liu

doi:10.1109/JSEN.2004.823685

Magnetic-to-Digital Converters Using Single-Amplifier-Based Second-Order Delta-Sigma Modulators

Chien Hung Kuo^*
, Shr Lung Chen
, Shen Iuan Liu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

In this paper, two magnetic-to-digital converters (MDCs) using single-amplifler-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.

Original language	English
Pages (from-to)	226-231
Number of pages	6
Journal	IEEE Sensors Journal
Volume	4
Issue number	2
DOIs	https://doi.org/10.1109/JSEN.2004.823685
Publication status	Published - 2004 Apr
Externally published	Yes

Keywords

CMOS
Delta-sigma modulator (DSM)
Magnetic sensor

ASJC Scopus subject areas

Instrumentation
Electrical and Electronic Engineering

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10.1109/JSEN.2004.823685

Cite this

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title = "Magnetic-to-Digital Converters Using Single-Amplifier-Based Second-Order Delta-Sigma Modulators",

abstract = "In this paper, two magnetic-to-digital converters (MDCs) using single-amplifler-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.",

keywords = "CMOS, Delta-sigma modulator (DSM), Magnetic sensor",

author = "Kuo, \{Chien Hung\} and Chen, \{Shr Lung\} and Liu, \{Shen Iuan\}",

year = "2004",

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doi = "10.1109/JSEN.2004.823685",

language = "English",

volume = "4",

pages = "226--231",

journal = "IEEE Sensors Journal",

issn = "1530-437X",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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}

TY - JOUR

T1 - Magnetic-to-Digital Converters Using Single-Amplifier-Based Second-Order Delta-Sigma Modulators

AU - Kuo, Chien Hung

AU - Chen, Shr Lung

AU - Liu, Shen Iuan

PY - 2004/4

Y1 - 2004/4

N2 - In this paper, two magnetic-to-digital converters (MDCs) using single-amplifler-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.

AB - In this paper, two magnetic-to-digital converters (MDCs) using single-amplifler-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.

KW - CMOS

KW - Delta-sigma modulator (DSM)

KW - Magnetic sensor

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U2 - 10.1109/JSEN.2004.823685

DO - 10.1109/JSEN.2004.823685

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JO - IEEE Sensors Journal

JF - IEEE Sensors Journal

IS - 2

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Magnetic-to-Digital Converters Using Single-Amplifier-Based Second-Order Delta-Sigma Modulators

Abstract

Keywords

ASJC Scopus subject areas

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