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本文提出了一款1V、22µW的32通道可植入EEG记录IC，集成了放大、滤波和10位ADC，用于颅内脑电图监测。解决了多通道、低功耗植入式传感器接口的挑战，适用于癫痫手术前的颅内EEG记录及其他植入式应用。
Epilepsy is one of the most common neurological disorders and affects more than 50 million individuals worldwide. Neurosurgery is an option for patients and intracranial EEG monitoring needs to be performed before surgery, which requires a multi-channel implantable EEG device. This paper presents a 1V 32channel reconfigurable sensor interface IC for intracranial EEG recording. The power consumption of the overall system including amplification, filtering, and 10b ADC is 22µW, which makes it suitable for other implantable applications such as deep-brain stimulation. According to [1], the input-referred noise for an implantable EEG device should be less than 1.5µVrms. A chopper-stabilized instrumentation amplifier [1-2] is not used in our design. The system architecture of the chip is shown in Fig. 6.7.1. It consists of 32 analog front-end blocks, a 32-to-1 multiplexer, a 10b SAR-ADC and a reference generator. Each of the analog blocks is implemented using 3 cascaded stages. The first st
Xiaodan Zou, Wen-Sin Liew, Libin Yao, Yong Lian
National University of Singapore, Singapore