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介绍了单片集成MEA系统和用于该系统的神经元信号探测电路和激励电路,基本单元电路是低功耗、低噪声、高增益和小版图尺寸的运算放大器.详细讨论了探测电路、激励电路和基本单元运算放大器的设计.神经元信号探测电路版图面积290μm×400μm,功耗2.02mW,等效输入噪声17.72nV/Hz,增益60.5dB,输出电压摆幅-2.48～+2.5V.激励电路版图面积130μm×290μm,功耗740μW,输出电压摆幅-2.5～2.04V.参数表明这2种电路适用于单片集成MEA系统.探测电路和单片集成MEA系统已经流片.探测电路的测试结果表明电路工作正常.
The monolithic integrated MEA system and the neuron signal detection circuit and excitation circuit for this system are introduced.The basic unit circuit is an op amp with low power consumption, low noise, high gain and small layout size.It discusses the detection circuit in detail, Circuit and basic unit operational amplifier.The neuron signal detection circuit layout area 290μm × 400μm, power consumption 2.02mW, the equivalent input noise of 17.72nV / Hz, the gain of 60.5dB, the output voltage swing -2.48 ~ +2.5 V. Excitation Circuit layout area of 130μm × 290μm, power consumption 740μW, the output voltage swing -2.5 ~ 2.04V. Parameters show that these two kinds of circuits for integrated single-chip MEA system. Detection circuit and monolithic integrated MEA system has been film. Detection circuit Test results show that the circuit is working properly.