Current injection electrodes for electrical impedance tomography.
Current injection electrodes for electrical impedance tomography.
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DOI：
10.1088/0967-3334/25/4/001
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发表时间：
2004-08
影响因子：
3.2
通讯作者：
S. Armstrong;D. Jennings
中科院分区：
文献类型：
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作者：
S. Armstrong;D. Jennings
电流传送器已被确定为电阻抗断层成像系统的电流注入电极内的可能组件，其中需要精确的电流生成或注入电流的精确测量。通过仿真研究了几种电路配置，以确定最适合满足EIT系统的规格。采用电流传送器的双极（浮置源）电路配置已被设计，它实现了大于12 mA的输出电流而不饱和，在一个可接受的体阻抗范围。在超过1 MHz的频率上进行了仿真，输出相移小于0.15度（高达250 kHz）和0.6度（高达1 MHz）。
Current conveyors have been identified as a possible component within the current injection electrodes of an electrical impedance tomography system, where accurate current generation or precise measurement of the current injected is required. Several circuit configurations have been investigated through simulation to determine the most suitable to meet the specifications of the EIT system. A bipolar (floating source) circuit configuration employing the use of current conveyors has been designed, which achieves greater than 12 mA output current without saturation, over an accepted body impedance range. Simulations were performed over frequencies in excess of 1 MHz, and the output phase shift was less than 0.15 degrees up to 250 kHz, and 0.6 degrees up to 1 MHz.