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 journalArticlepeer-review

2 Citations (Scopus)


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 languageEnglish
Pages (from-to)226-231
Number of pages6
JournalIEEE Sensors Journal
Issue number2
Publication statusPublished - 2004 Apr
Externally publishedYes


  • CMOS
  • Delta-sigma modulator (DSM)
  • Magnetic sensor

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


Dive into the research topics of 'Magnetic-to-Digital Converters Using Single-Amplifier-Based Second-Order Delta-Sigma Modulators'. Together they form a unique fingerprint.

Cite this