Instrumentation amplifier implements second-order active low-pass filter with high gain factor

被引：5

作者：

Blomqvist, Kim H. ^{[1
]}

Eskelinen, Pekka ^{[1
]}

Sepponen, Raimo E. ^{[1
]}

机构：

[1] Aalto Univ, Dept Elect, Aalto 00076, Finland

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2011年 / 22卷 / 05期

关键词：

active filter; 2-pole; in amp; high gain; dc voltage subtraction;

D O I：

10.1088/0957-0233/22/5/057002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A single-ended second-order active low-pass filter can simultaneously provide high gain factor and dc voltage subtraction. This makes it possible to reduce the number of components and signal processing stages needed in an application where small voltage changes are measured on the top of large dc voltage masked by a large amplitude oscillating carrier. The filter described in this paper is constructed from a conventional 3-op-amp instrumentation amplifier and five passive circuit elements.

引用

页数：3

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*AN DEV INC, 2007, AD8221 AN DEV INC

[2] A feasibility study of altered spatial distribution of losses induced by eddy currents in body composition analysis [J].