一种激光在线气体分析仪中数字双相锁相放大器

Digital double-phase lock-in amplifier for laser online gas analyzer

  • Inventors: ZHOU JIAN
  • Assignees: 周健
  • Publication Date: December 25, 2013
  • Publication Number: CN-103475326-A

Abstract

本发明公开了一种激光在线气体分析仪中数字双相锁相放大器,包括输入信号,输入信号将信号输入到相敏检波,相敏检波连接参考信号,相敏检波通过低通滤波器连接可编程增益放大器,可编程增益放大器的输入端连接偏置输入,所述可编程增益放大器的输出连接ADC转换模块。本发明结构简单,既解决了纯模拟锁相的电路冗余和复杂,也解决了数字锁相进行的数字相关运算中引发的大存储和大运算问题。
The invention discloses a digital double-phase lock-in amplifier for a laser online gas analyzer. The digital double-phase lock-in amplifier comprises an input signal. The input signal inputs signals to phase sensitive detections which are connected with a reference signal. Each phase sensitive detection is connected with a programmable gain amplifier. An input end of each programmable gain amplifier is connected with a bias input. Outputs of programmable gain amplifiers are connected with an ADC (analog to digital converter) conversion module. The digital double-phase lock-in amplifier is simple in structure, and the problems that pure analog phase locking circuits are redundant and complex and digital related calculation of digital phase locking causes large storage and calculation are solved.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    CN-101060311-AOctober 24, 2007中山大学一种数字锁相放大器
    CN-101989840-AMarch 23, 2011雷凌科技股份有限公司Operational amplifier capable of eliminating direct current voltage deviation
    CN-103257110-AAugust 21, 2013江苏天瑞仪器股份有限公司Signal transmission method for laser online gas analysis and transmission device thereof
    CN-1885043-ADecember 27, 2006中国科学院电子学研究所小型锁相放大器的数字控制电路及方法
    CN-203522661-UApril 02, 2014周健Digital two-phase lock-in amplifier of laser online gas analyzer
    JP-2010164413-AJuly 29, 2010Shimadzu Corp, 株式会社島津製作所ガス濃度測定装置

NO-Patent Citations (4)

    Title
    徐博: "工业气体激光在线监测仪的研制", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, 15 March 2013 (2013-03-15)
    邢佳: "基于系统比例测量的非接触式微弱电流检测系统及其应用", 《中国优秀硕士学位论文全文数据库信息科技辑》, 15 January 2011 (2011-01-15), pages 43 - 48
    闫行: "微弱电流信号检测系统的设计", 《中国优秀硕士学位论文全文数据库信息科技辑》, 15 October 2011 (2011-10-15)
    闫行等: "基于传感器微弱电流矢量检测电路的设计", 《自动化与仪表》, vol. 26, no. 1, 31 January 2011 (2011-01-31), pages 13 - 15

Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-104092442-BFebruary 22, 2017广东顺德中山大学卡内基梅隆大学国际联合研究院, 中山大学一种模拟数字混合结构的锁相放大器及其锁相放大方法