A CMOS current driver with built-in common-mode signal reduction capability for EIT
A CMOS current driver with built-in common-mode signal reduction capability for EIT
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具有内置 EIT 共模信号降低功能的 CMOS 电流驱动器
DOI：
10.1109/esscirc.2017.8094567
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
A. Demosthenous
中科院分区：
文献类型：
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作者：
Yuehua Wu;D. Jiang;P. Langlois;R. Bayford;A. Demosthenous
介绍了一种用于可穿戴式多频电阻抗断层扫描（EIT）的集成式全差分电流驱动器。集成电路（IC）包括一个宽带电流驱动器（高达500khz）作为电流源的主端，和一个具有共模反馈配置的差分电压接收器作为电流吸收的从端。该IC采用0.18 μm CMOS工艺制造。它在±1.65 V电源下工作，占用的总晶片面积小于0.05 mm2。电流驱动器在500 kHz时的测量输出阻抗为750 kΩ，在500 kHz时提供32 dB的共模信号衰减。介绍了集成电路在可穿戴式EIT肺部监测系统中的应用。
This paper presents an integrated fully differential current driver for wearable multi-frequency electrical impedance tomography (EIT). The integrated circuit (IC) comprises a wideband current driver (up to 500 kHz) functioning as the master for current sourcing, and a differential voltage receiver with common-mode feedback configuration as the slave for current sinking. The IC is fabricated in a 0.18-μm CMOS technology. It operates from ±1.65 V power supplies and occupies a total die area of less than 0.05 mm2. The current driver has a measured output impedance of 750 kΩ at 500 kHz and provides a common-mode signal reduction of 32 dB at 500 kHz. The application of the IC in a wearable EIT lung monitoring system is presented.