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首页> 外文会议>Biomedical Circuits and Systems Conference, 2009. BioCAS 2009 >A functional monitoring system for electrical safety of biochips
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A functional monitoring system for electrical safety of biochips

机译：用于生物芯片电气安全的功能监控系统

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摘要

A safe electrical connection between an integrated circuit and the human body is required for the recording of physiological signals such as ECG, ENG, or EMG. The recording chip is typically connected to the patient through a blocking capacitor, which prevents the flow of DC currents in the event of circuit failure. However, in systems with a high integration density blocking capacitors become inconvenient due to their large size and the effect on the signal transfer function. Therefore, a fully integratable functional monitoring scheme is proposed which involves applying a test signal to the amplifier input and detecting its presence at the output. In the event of failure the resulting change in the output voltage is detected and the chip can be switched into a safe state. Test signal addition and extraction circuits are proposed and analyzed. Simulated results are presented to confirm the correct operation in the context of a typical recording front-end.
机译：记录生理信号（例如ECG，ENG或EMG）需要在集成电路和人体之间建立安全的电连接。记录芯片通常通过隔离电容器连接到患者，该隔离电容器在电路故障的情况下防止直流电流的流动。然而，在具有高集成密度的系统中，由于阻塞电容器的大尺寸以及对信号传递功能的影响，阻塞电容器变得不方便。因此，提出了一种完全可集成的功能监视方案，该方案包括将测试信号施加到放大器输入并检测其在输出端的存在。发生故障时，可以检测到输出电压的变化，并且可以将芯片切换到安全状态。提出并分析了测试信号的加减电路。给出了模拟结果，以确认典型记录前端环境中的正确操作。

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