Paper Title:
Circuit Design for Alternating Current Field Measurement Make Use of Lock-in Amplifier
  Abstract

In ACFM, the measured signal is very weak and always inevitably includes the noises and the unwanted signal. Make use of lock-in amplifier technology to have designed a disturbance magnetic field testing circuit which includes eliminating 2.5 volt DC circuit, amplifying and filtering circuit, phase-shifting circuit and switching voltage multiplier. This circuits designed can performe the measurement and do-nosing for weak magnetic signal of ACFM. The experiment indicated that make use of lock-in amplifier technology to design and optimize ACFM detection circuit is an effective method

  Info
Periodical
Edited by
Zhou Mark
Pages
1107-1112
DOI
10.4028/www.scientific.net/AMM.52-54.1107
Citation
S. K. Ren, Y. Yang, Z. J. Li, "Circuit Design for Alternating Current Field Measurement Make Use of Lock-in Amplifier", Applied Mechanics and Materials, Vols. 52-54, pp. 1107-1112, 2011
Online since
March 2011
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