信息与电子工程2012，Vol.10Issue(2)：213-216,4.
一种磁通门传感器的选频放大电路设计
Design of a frequency selective amplifier circuit used in fluxgate
摘要
Abstract
Frequency selective amplifier circuit is a multiple loop feedback bandpass filter, which consists of one operational amplifier, resistors and capacitors in the signal processing circuit of traditional fluxgate. Although it bears the advantages of simple structure, high reliability and low cost, it is difficult for the resistors and capacitors in the circuit to be integrated due to their large numerical values. For the purpose of miniaturization, basing on the existing fluxgate probe mode] in Hspcie, this paper presents a bandpass switched-capacitor filter employing cascaded biquad module to realize the function of frequency selection and amplification. The application of complementary switching technology and dynamic range scaling technology has improved the accuracy of the filter. The simulation results based on Hspice show thai the proposed bandpass switched-capacitor filter can select and enlarge the harmonic wave much more better than the traditional analog bandpass filter implemented by CMOS technology under 3 V power supply.关键词
磁通门/选频放大电路/开关电容滤波器/双二阶Key words
fluxgate/ frequency selective amplifier circuit/ switched-capacitor filter/ biquad分类
电子信息工程引用本文复制引用
崔智军..一种磁通门传感器的选频放大电路设计[J].信息与电子工程,2012,10(2):213-216,4.基金项目
安康学院重点学科支持资助项目(AYZD201001) （AYZD201001）
安康学院高层次人才科研专项资助项目(AYQDZR201114) （AYQDZR201114）
安康学院大学生科技创新资助项目(2011AKXYDXS01) （2011AKXYDXS01）
