摘要
设计了一种利用延伸栅极型晶体管(EGFET)检测溶液pH值的电路,包括信号采集、信号转换与处理、放大电路设计、模数转换器(ADC)及软件设计部分。实测结果表明:设计的电路在溶液pH值4~10范围内输出电压的灵敏度为39.68 m V/pH。与传统的pH玻璃电极相比,设计的传感器具有响应速度快、易于封装、对光和温度不敏感、稳定性好等特点。
A detection circuit of extended-gate field-effect-transistors（EGFET）-based pH senors is designed,including signal acquisition,signal conversion and processing,amplifier circuit design,ADC converter,and software design.The experimental result shows that the sensitivity of output voltage of circuit is 39.68 m V/pH ranging from pH = 4 to pH = 10. Compared with conventional pH glass electrodes,EGFET-based pH sensors have the characteristics of fast response,easy for encapsulation,insensitive to light and temperature,and good stability,and so on.
作者
耿亮
惠泽基
张孝冬
韩宝如
廖建军
GENG Liang;HUI Ze-ji;ZHANG Xiao-dong;HAN Bao-ru;LIAO Jian-jun(Institute of Tropical Agriculture and Forestry,Hainan University,Haikou 570228,China;College of Medical Informatics,Medical University of Chongqing,Chongqing 400016,China)
出处
《传感器与微系统》
CSCD
2018年第11期96-98,102,共4页
Transducer and Microsystem Technologies
关键词
延伸栅极型晶体管
PH传感器
检测电路
extended-gate field-effect-transistors （EGFET）
pH sensor
detection circuit
