Optimization of low pass filter design in lock-in amplifier

Huaxiang Wang; Zhang Cao

Optimization of low pass filter design in lock-in amplifier

Huaxiang Wang^*
, Zhang Cao

^*Corresponding author for this work

Tianjin University

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

5 Scopus citations

Abstract

For online imaging systems, the lock-in amplifier (LIA) with the low pass filter (LPF) is the main obstacle for faster performance. When designing the LPF based on ideal Op Amps, the coupling effects of non-ideal Op Amps are omitted, resulting in dissatisfactory performance of LPF. The influence of non-ideal Op Amps on performance of LPF is studied and a software package in MATLAB^® environment is developed to calculate the optimum R and C and improve the speed of lock-in amplifiers in online process tomography systems, so as to fasten the image reconstructing speed.

Original language	English
Pages (from-to)	684-688+704
Journal	Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument
Volume	26
Issue number	7
State	Published - Jul 2005
Externally published	Yes

Keywords

Linear model
Lock-in amplifier
Low pass filter(LPF)
MATLAB
Non-ideal Op amplifier
Optimum parameters

Cite this

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title = "Optimization of low pass filter design in lock-in amplifier",

abstract = "For online imaging systems, the lock-in amplifier (LIA) with the low pass filter (LPF) is the main obstacle for faster performance. When designing the LPF based on ideal Op Amps, the coupling effects of non-ideal Op Amps are omitted, resulting in dissatisfactory performance of LPF. The influence of non-ideal Op Amps on performance of LPF is studied and a software package in MATLAB{\textregistered} environment is developed to calculate the optimum R and C and improve the speed of lock-in amplifiers in online process tomography systems, so as to fasten the image reconstructing speed.",

keywords = "Linear model, Lock-in amplifier, Low pass filter(LPF), MATLAB, Non-ideal Op amplifier, Optimum parameters",

author = "Huaxiang Wang and Zhang Cao",

year = "2005",

month = jul,

language = "英语",

volume = "26",

pages = "684--688+704",

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T1 - Optimization of low pass filter design in lock-in amplifier

AU - Wang, Huaxiang

AU - Cao, Zhang

PY - 2005/7

Y1 - 2005/7

N2 - For online imaging systems, the lock-in amplifier (LIA) with the low pass filter (LPF) is the main obstacle for faster performance. When designing the LPF based on ideal Op Amps, the coupling effects of non-ideal Op Amps are omitted, resulting in dissatisfactory performance of LPF. The influence of non-ideal Op Amps on performance of LPF is studied and a software package in MATLAB® environment is developed to calculate the optimum R and C and improve the speed of lock-in amplifiers in online process tomography systems, so as to fasten the image reconstructing speed.

AB - For online imaging systems, the lock-in amplifier (LIA) with the low pass filter (LPF) is the main obstacle for faster performance. When designing the LPF based on ideal Op Amps, the coupling effects of non-ideal Op Amps are omitted, resulting in dissatisfactory performance of LPF. The influence of non-ideal Op Amps on performance of LPF is studied and a software package in MATLAB® environment is developed to calculate the optimum R and C and improve the speed of lock-in amplifiers in online process tomography systems, so as to fasten the image reconstructing speed.

KW - Linear model

KW - Lock-in amplifier

KW - Low pass filter(LPF)

KW - MATLAB

KW - Non-ideal Op amplifier

KW - Optimum parameters

UR - https://www.scopus.com/pages/publications/23744476014

M3 - 文章

AN - SCOPUS:23744476014

SN - 0254-3087

VL - 26

SP - 684-688+704

JO - Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument

JF - Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument

IS - 7

ER -

Optimization of low pass filter design in lock-in amplifier

Abstract

Keywords

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