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Development of a bioimpedance spectrometer based on AD8302
Author(s):
Yang Yuxiang
,
Wang Jue
,
Niu Feilong
,
Wang Hongwu
Pages:
168
-
170
Year:
2006
Issue:
z1
Journal:
CHINESE JOURNAL OF SCIENTIFIC INSTRUMENT
Keyword:
增益相位检测
;
AD8302
;
生物阻抗频谱
;
测量
;
Abstract:
对正弦信号幅值和相位的准确检测是生物阻抗频谱测量中的关键和难点.AD8302是AD公司首款可同时测量两输入信号之间幅度比和相位差的单片集成芯片.本文针对目前生物阻抗频谱测量中的难点,设计了一种基于AD8302的便携式生物阻抗频谱测量仪.文中详细介绍了AD8302的特点和具体的电路设计方法.实测结果表明:在20kHz~1MHz的频率范围内,阻抗幅值的相对误差小于0.36%,相位的绝对误差小于0.26°,实现了生物阻抗频谱的准确测量.
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