Note: Temperature effects in the modified Howland current source for electrical bioimpedance spectroscopy.
Note: Temperature effects in the modified Howland current source for electrical bioimpedance spectroscopy.
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注：用于生物阻抗谱的改良 Howland 电流源中的温度影响。
DOI：
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发表时间：
2017
影响因子：
1.6
通讯作者：
P. Bertemes
中科院分区：
文献类型：
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作者：
S. Fernandez Santos;P. Bertemes
本研究的目的是展示改进的Howland电流源（MHCS）如何受到温度变化的影响。测试温度范围为20 ~ 70℃，频率范围为100hz ~ 1mhz。测量了输出电流、输出阻抗、总谐波失真和振荡等参数。测量是在温度控制的环境中进行的。结果表明，MHCS在低于70℃的温度下是稳定的。为了防止高温下的振荡，应该仔细考虑具有低温漂移和匹配电阻的运算放大器。
The aim of this study is to show how the modified Howland current source (MHCS) is affected by temperature changes. The source has been tested in a temperature range from 20 to 70 °C and frequency range from 100 Hz to 1 MHz. Parameters like output current, output impedance, total harmonic distortion, and oscillation have been measured. The measurements were made inside a temperature controlled environment. It was showed that the MHCS is stable at temperatures below 70 °C. Operational amplifiers with a low temperature drift and matching resistor should be carefully considered in order to prevent oscillations at high temperatures.