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介绍了一款用于消化道酸碱度监测的专用接口集成电路芯片。该电路包含了信号放大电路、模数转化电路等,可以同时测量温度信号。芯片采用0.18μm CMOS工艺实现,芯片大小仅为0.6mm×0.4mm,配合酸碱度传感电极和无线收发模块可制成消化道无线监测智能胶囊。对该芯片进行测试,结果显示,电路工作状态良好,可精确地采集信号,酸碱度检测的精度可以达到±0.1pH,温度检测精度可达±0.2℃。
A special integrated circuit chip for pH monitoring of gastrointestinal tract was introduced. The circuit contains a signal amplifier circuit, analog-digital conversion circuit, etc., can simultaneously measure the temperature signal. Chip using 0.18μm CMOS technology, the chip size is only 0.6mm × 0.4mm, with the pH sensor electrode and wireless transceiver module can be made of gastrointestinal tract wireless monitoring smart capsule. The chip test results show that the circuit work in good condition, accurate signal acquisition, pH accuracy of detection can reach ± 0.1pH, temperature detection accuracy of ± 0.2 ℃.